CN106441916A - Exhaust apparatus for exhaust simulation test of exhaust nozzle of supersonic engine - Google Patents
Exhaust apparatus for exhaust simulation test of exhaust nozzle of supersonic engine Download PDFInfo
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- CN106441916A CN106441916A CN201610786167.4A CN201610786167A CN106441916A CN 106441916 A CN106441916 A CN 106441916A CN 201610786167 A CN201610786167 A CN 201610786167A CN 106441916 A CN106441916 A CN 106441916A
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- tail room
- tail
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- expansion segment
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/10—Testing internal-combustion engines by monitoring exhaust gases or combustion flame
- G01M15/102—Testing internal-combustion engines by monitoring exhaust gases or combustion flame by monitoring exhaust gases
- G01M15/106—Testing internal-combustion engines by monitoring exhaust gases or combustion flame by monitoring exhaust gases using pressure sensors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
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- Exhaust Gas After Treatment (AREA)
Abstract
The invention discloses an exhaust apparatus for an exhaust simulation test of an exhaust nozzle of a supersonic engine. The exhaust apparatus comprises a tail chamber and an ejector, the tail chamber comprises a fixed large tail chamber and a replaceable small tail chamber, the fixed large tail chamber comprises a tail chamber convergence segment, a tail chamber equal-diameter segment, and a tail chamber expansion segment, the replaceable small tail chamber comprises a small tail chamber flange and a small tail chamber cylinder body, the small tail chamber cylinder body is arranged in the tail chamber convergence segment, the fixed large tail chamber is provided with a circulating cooling water device and a cooling water spraying device, the ejector comprises a low-pressure chamber, a transition segment, a blending convergence segment, a blending equal-diameter segment and a blending expansion segment, the inner part of the low-pressure chamber is fixedly connected with a circular ring diversion and guiding device, an ejection airflow conveying pipeline, an ejection airflow convergence segment and an ejection airflow expansion segment, and cross sections of an outlet of the low-pressure chamber and an outlet of the ejection airflow expansion segment are located in the same vertical plane. According to the exhaust apparatus, test requirements for simulating high-altitude flight states of different supersonic engines on the ground can be met.
Description
Technical field
The present invention relates to a kind of exhaust apparatus, especially a kind of exhaust of supersonic speed nozzle exhaust simulated test
Device.
Background technology
When in ground simulation supersonic speed engine high-altitude flight state, generally first engine is arranged on altitude simulation cabin
Interior, residing height when stratochamber being carried out be evacuated pressure and the engine high-altitude flight making in altitude simulation cabin using air-extractor
The environmental pressure of degree is identical, then carries out engine ignition, carries out high-altitude flight simulated test, will remain in process of the test
Pressure in altitude simulation cabin is identical with the environmental pressure of residing height during engine high-altitude flight, and this is accomplished by immediately by Supersonic
The gas that fast engine is discharged discharges altitude simulation cabin, in prior art, is generally evacuated using injector or vacuum tank, and
Altitude simulation pressure out of my cabin is usually 0.11MPa, and the environmental pressure of supersonic speed engine flight height is then only atmospheric pressure
0.1 times of power, or even 0.01 times, the pressure ratio of gas extraction system will reach 10 to 100, and the flow of corresponding gas extraction system import is every
Second then up to more than ten kilograms even up to a hundred kilograms, so big pressure ratio and by draught jet capacity, only lean on the supercharging of injector it is necessary to
Three arrive level Four series connection, if adopting vacuum tank, the volume of vacuum tank up to go up ten thousand stere it can be seen that, no matter individually
Using injector or vacuum tank as air-extractor, it is required to huge structure, not only inefficiency, expense is also sufficiently expensive;
Secondly, engine testsand generally need to carry out high-altitude flight simulation to various engines, and different engines, the chi of engine
Very little, nozzle size, engine export flow are all different, using a set of air-extractor it is impossible to meet various engines
Test requirements document;In prior art, generally it is evacuated using injector, injector is with higher pressure injection airflow injection low pressure
(or no press) by injection air-flow, complete the device that the suction of injection air-flow is carried out by injection air-flow blending injection or conveying, due to
Injector without motion part, using reliability, is widely used in engine testsand gas extraction system;And offer injection air-flow is drawn
Penetrating portion and the geometry in blending portion of blending injection, position relationship is the key factor determining injector performance, and prior art
In for engine testsand gas extraction system injector, do not form ripe, rational injection portion and blending portion each other
Geometry, position relationship, lead to the injection degraded performance of injector, reduce the efficiency of test, increased experimentation cost simultaneously;
Additionally, the gas discharged of the engine of high-altitude flight is high-temperature gas, its temperature generally more than 350 DEG C, as engine row
In metallic conduit internal flow, due to the attribute of metal heat-expansion shrinkage, pipeline axial expansion to the high-temperature gas going out can occur, when
After high-temperature medium flows over, recover normal temperature with metallic conduit, metallic conduit can shorten to original length, and existing support of pipelines is no
Method absorbs the axial length change that metallic conduit causes due to expanding with heat and contract with cold, and then leads to support of pipelines deformation even to be ruptured,
Pipeline also can deform with altitude simulation cabin fixed connection place or even rupture simultaneously.
Content of the invention
The invention aims to overcoming the defect of above-mentioned prior art presence and providing a kind of supersonic speed engine
Jet pipe is vented the exhaust apparatus of simulated test to meet the examination in ground simulation high-altitude flight state for the different supersonic speed engines
Test requirement.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of supersonic speed nozzle is vented the exhaust apparatus of simulated test, according to nozzle exiting exhaust gas
Flow direction, described exhaust apparatus includes the tail room being coaxially fixedly connected sequentially and injector;Described tail room includes fixing big tail
Room and replaceable little tail room, according to nozzle exiting exhaust gas flow direction, the big tail room of described fixation include coaxial successively
The tail room converging portion being fixedly connected by flange, the straight section such as tail room and tail room expansion segment, described replaceable little tail room includes coaxially
The little tail room flange being fixedly connected and little tail room cylinder, what described little tail room cylinder was coaxial with described tail room converging portion is arranged on institute
State in the converging portion of tail room, the flange of described little tail room flange and described tail room converging portion entrance connects;The big tail room of described fixation with
The tail room support being arranged in altitude simulation cabin is fixedly connected, the straight section outlet(discharge) flange such as described tail room with expand bellows one end
Flange connects, and the described other end expanding bellows is fixedly connected with altitude simulation cabin;Described tail room converging portion, tail room etc. are straight
Section, tail room expansion segment and replaceable little tail room are hollow revolving body;There is the engine of nozzle and described tail room
Converging portion is arranged in altitude simulation cabin, and described engine is supersonic speed engine;Described tail room converging portion, the straight section such as tail room and
Tail room expansion segment is equipped with recirculated cooling water device and cooling water water injector;According to by the flow direction of injection air-flow, described
Injector includes the low-pressure chamber being sequentially coaxially fixedly connected, changeover portion, blends converging portion, the straight section such as blending, blends expansion segment, institute
State low-pressure chamber and include low pressure room housing and the flange being fixedly connected with low pressure room housing two ends, described low pressure interior is according to by injection
The flow direction of air-flow is sequentially coaxially fixedly connected with annulus shunting guiding device, injection airflow pipeline, and injection air-flow is received
Hold back section, injection air-flow expansion segment, described annulus shunting guiding device entrance is fixedly connected with injection air-flow inlet manifold, outlet and
The entrance of injection airflow pipeline is fixedly connected, described low pressure room housing, changeover portion, blends converging portion, the straight section such as blending, mixes
Mixed expansion segment, injection airflow pipeline, injection air-flow converging portion, injection air-flow expansion segment is hollow revolving body, described draws
The center line penetrating airflow pipeline is overlapped with the center line of described low pressure room housing, and described low-pressure chamber exports and described injection gas
In same vertical plane, described low-pressure chamber is connected with injector fixed support for the outlet of stream expansion segment, the straight section such as described blending
It is connected with injector travel(l)ing rest;The outlet of described tail room expansion segment is fixedly connected with the entrance of low-pressure chamber, and described blending is expanded
Section is arranged on altitude simulation out of my cabin.
Further, described annulus shunting guiding device one end is fixedly connected with deflection cone, the center line of described deflection cone
The center line shunting guiding device with described annulus overlaps, and the summit of described deflection cone is on described low-pressure chamber entrance section.
Further, described tail room converging portion includes tail room converging portion recirculated water and enters water ring, and tail room converging portion recirculated water is arranged
Water ring, tail room converging portion circulates water ring, tail room converging portion water ring, tail room converging portion inner core, tail room converging portion outer tube;Described tail
It is fixedly connected by axially arranged tail room converging portion reinforcing bar between room converging portion inner core and tail room converging portion outer tube, described tail room
Converging portion recirculated water enters the flange that water ring one end exported with tail room converging portion and is fixedly connected, and the other end is solid with tail room converging portion outer tube
Fixed connect, described tail room converging portion recirculated water draining ring one end is fixedly connected with the flange of tail room converging portion import, the other end and
Tail room converging portion outer tube is fixedly connected, and described tail room converging portion recirculated water enters between water ring and tail room converging portion recirculated water draining ring
It is provided with tail room converging portion circulation water ring and tail room converging portion water ring, described tail room converging portion circulation water ring and tail room converging portion
Water ring is arranged alternately in the axial direction successively, is provided with nozzle, described nozzle sequentially passes through in the converging portion water ring of described tail room
Tail room converging portion outer tube and described tail room converging portion inner core, described tail room converging portion recirculated water enters water ring and the circulation of tail room converging portion
On the circumference that water draining ring is located, tail room converging portion outer tube is respectively arranged with recirculated water inlet opening and recirculated water osculum, circulation
Water passes through described recirculated water inlet opening and enters the interlayer between described tail room converging portion inner core and tail room converging portion outer tube and pass through
Interlayer enters tail room converging portion recirculated water draining ring and by described recirculated water draining after converging portion circulation water circulation in tail room moves
Hole is discharged;Described tail room converging portion recirculated water enters water ring, and tail room converging portion recirculated water draining ring is provided with circulating water pipe joint,
Cooling water spray pipe joint is provided with the converging portion water ring of described tail room.
The straight sections such as described tail room include the straight section recirculated water such as tail room and enter water ring, the straight section recirculated water draining ring such as tail room, tail room
Circulate water ring, the straight section water ring such as tail room, the straight section inner core such as tail room, the straight section outer tube such as tail room Deng straight section;The straight sections such as described tail room
It is fixedly connected by straight section reinforcing bars such as axially arranged tail rooms between the straight section outer tube such as inner core and tail room, the straight section such as described tail room follows
Ring water is entered water ring one end and is fixedly connected with the flange of the straight section imports such as tail room, and the other end is fixedly connected with straight section outer tube such as tail rooms,
The flange that the straight section recirculated water draining ring one end such as described tail room is exported with straight sections such as tail rooms is fixedly connected, and the other end and tail room etc. are straight
Section outer tube is fixedly connected, and the straight section recirculated water such as described tail room enters and is provided with tail between the straight section recirculated water draining ring such as water ring and tail room
The straight sections such as room circulate the straight section water ring such as water ring and tail room, and the straight section such as the described tail room circulation straight section water ring such as water ring and tail room exists
It is arranged alternately successively in axial direction, in the straight section water ring such as described tail room, is provided with nozzle, it is straight that described nozzle sequentially passes through tail room etc.
The section straight section inner core such as outer tube and described tail room, the straight section recirculated water such as described tail room enters the straight section recirculated water draining ring such as water ring and tail room
On the circumference being located, the straight section outer tube such as tail room is respectively arranged with recirculated water inlet opening and recirculated water osculum, and recirculated water passes through institute
State the interlayer between the straight section outer tube such as straight section inner core and tail room such as the recirculated water inlet opening described tail room of entrance and pass through interlayer in tail
The straight sections such as room circulation water circulation is entered the straight section recirculated water draining rings such as tail room and is discharged by described recirculated water osculum after moving;Institute
State the straight section recirculated water such as tail room and enter water ring, the straight section recirculated water draining ring such as tail room is provided with circulating water pipe joint, described tail room
Deng cooling water spray pipe joint is provided with straight section water ring.
Described tail room expansion segment includes tail room expansion segment recirculated water and enters water ring, tail room expansion segment recirculated water draining ring, tail room
Expansion segment circulates water ring, tail room expansion segment water ring, tail room expansion segment inner core, tail room expansion segment outer tube;Described tail room expansion segment
It is fixedly connected by axially arranged tail room expansion segment reinforcing bar between inner core and tail room expansion segment outer tube, described tail room expansion segment follows
Ring water is entered water ring one end and is fixedly connected with the flange of tail room expansion segment import, and the other end is fixedly connected with tail room expansion segment outer tube,
The flange that described tail room expansion segment recirculated water draining ring one end is exported with tail room expansion segment is fixedly connected, and the other end is expanded with tail room
Section outer tube is fixedly connected, and described tail room expansion segment recirculated water enters and is provided with tail between water ring and tail room expansion segment recirculated water draining ring
Room expansion segment circulation water ring and tail room expansion segment water ring, described tail room expansion segment circulation water ring and tail room expansion segment water ring exist
It is arranged alternately successively in axial direction, in the expansion segment water ring of described tail room, is provided with nozzle, described nozzle sequentially passes through the expansion of tail room
Section outer tube and described tail room expansion segment inner core, described tail room expansion segment recirculated water enters water ring and tail room expansion segment recirculated water draining ring
On the circumference being located, tail room expansion segment outer tube is respectively arranged with recirculated water inlet opening and recirculated water osculum, and recirculated water passes through institute
State the interlayer between recirculated water inlet opening entrance described tail room expansion segment inner core and tail room expansion segment outer tube and pass through interlayer in tail
Room expansion segment circulation water circulation is entered tail room expansion segment recirculated water draining ring after moving and is discharged by described recirculated water osculum;Institute
State tail room expansion segment recirculated water and enter water ring, tail room expansion segment recirculated water draining ring is provided with circulating water pipe joint, described tail room
Cooling water spray pipe joint is provided with expansion segment water ring.
Further, described tail room support includes tail room bracket holder, tail room scaffold bracket, tail room support guide holder,
Tail room support base plate, tail room support upper roller guide plate, tail room support bottom roller guide plate, tail room support roll wheel assembly, tail room
Support fixed support;Described tail room bracket holder is fixedly connected with described tail room scaffold bracket, described tail room bracket holder
It is provided with the through hole corresponding with the flange hole of the straight section entrances such as described tail room;The described tail room bracket holder being fixedly connected and
Tail room scaffold bracket lower end is fixedly connected with tail room support base plate, and described tail room support plate upper surface is fixedly installed tail room and props up
Frame guide holder, described tail room support guide holder is 2, each described tail room support guide holder is provided with pin-and-hole, alignment pin divides
Chuan Guo 2 described tail room support guide holders not connected the pin-and-hole on 2 described tail room support guide holders;Described tail room support bottom
Plate lower surface is provided with tail room support upper roller guide plate, and described tail room support fixed support bottom is fixedly installed on altitude simulation
In cabin, described tail room support fixed support upper surface is fixedly connected with described tail room support bottom roller guide plate lower surface;Described
Tail room support roll wheel assembly is arranged between described tail room support upper roller guide plate and described tail room support bottom roller guide plate,
Described tail room support roll wheel assembly includes tail room support roller and tail room Support frame, and described tail room support roller is arranged on tail room
In Support frame, set between the described tail room bracket holder being fixedly connected and tail room scaffold bracket and described tail room support base plate
It is equipped with tail room support reinforcement.
Described injector travel(l)ing rest includes injector travel(l)ing rest upper bracket, injector travel(l)ing rest base plate, injector
Travel(l)ing rest upper roller guide plate, injector travel(l)ing rest bottom roller guide plate, injector travel(l)ing rest roll wheel assembly, injector
Travel(l)ing rest lower carriage;Described injector travel(l)ing rest upper bracket is fixedly connected with straight sections such as blending, described injector activity
Frame plate upper surface is fixedly connected with injector travel(l)ing rest upper bracket;Described injector travel(l)ing rest base plate lower surface is provided with
Injector travel(l)ing rest upper roller guide plate, described injector travel(l)ing rest fixed support upper surface and described injector activity
Frame bottom roller guide plate lower surface is fixedly connected;Described injector travel(l)ing rest roll wheel assembly is arranged on described injector activity
Between frame upper roller guide plate and described injector travel(l)ing rest bottom roller guide plate, described injector travel(l)ing rest base plate and drawing
It is fixedly connected by turnbuckle between emitter travel(l)ing rest lower carriage;Described injector travel(l)ing rest roll wheel assembly includes injection
Device travel(l)ing rest roller and injector travel(l)ing rest framework, described injector travel(l)ing rest roller is arranged on injector travel(l)ing rest
In framework;It is provided with reinforcement between described injector travel(l)ing rest upper bracket and described injector travel(l)ing rest base plate;Described
Injector travel(l)ing rest fixed support bottom is fixed with ground by foundation bolt.
Further, a diameter of D of described tail room converging portion entrancew, convergency is αwr;The diameter of the straight sections such as described tail room
Dwkp, length is Lwkp;A diameter of D of described tail room expansion segment outletwc, the angle of flare is αwc;Described Dw, Dwkp, LwkpMeet following
Equation group:
Lwkp=4Dwkp(7);
In above-mentioned equation group:Mw:Tail room converging portion entrance Mach number;k:Specific heat ratio;π(Mw):Tail room converging portion entrance Mach
The corresponding static pressure of number and stagnation pressure ratio;Pw:The corresponding static pressure of tail room converging portion entrance Mach number, unit is pa;Pt5:Tail room is restrained
The section corresponding stagnation pressure of entrance Mach number, unit is pa;Dw:The diameter of tail room converging portion entrance, unit is mm;d4kp:Engine larynx
Road diameter, unit is mm;After the corresponding normal shock wave of tail room converging portion entrance Mach number with normal shock wave before overall pressure tatio;q
(Mw):The corresponding velocity coeffficient of tail room converging portion entrance Mach number;Dwkp:The diameter of the straight sections such as tail room, unit is mm;Lwkp:Tail
The length of the straight sections such as room, unit is mm;
Wherein, real environment when the corresponding static pressure of tail room converging portion entrance Mach number and supersonic speed engine high-altitude flight
Pressure is identical, the outlet Mach of the nozzle of the corresponding stagnation pressure of tail room converging portion entrance Mach number and supersonic speed engine
The corresponding stagnation pressures of number are identical, and the nozzle exit Mach number of supersonic speed engine is more than 1, the starting of supersonic speed engine
Tail nozzle exit Mach number, the corresponding stagnation pressure of nozzle exit Mach number of supersonic speed engine, supersonic speed is started
Real environmental pressure during machine high-altitude flight, specific heat ratio and engine throat diameter are the intrinsic known ginseng of supersonic speed engine
Number, the parameter in above-mentioned equation group:Mw, k, π (Mw), Pw, Pt5, Ww, d4kp,q(Mw), Dwkp, LwkpIt is engine testsand
In all tests engine in, the maximum corresponding parameter of engine of nozzle rate of discharge.
Described convergency meets:0 < αwr≤12°;The described angle of flare meets 0 < αwc≤12°.
Further, a diameter of D of described replaceable little tail roomwx, described DwxMeet following equations group:
In above-mentioned equation group:Mwx:Replaceable little tail chamber inlet Mach number;π(Mwx):Replaceable little tail chamber inlet Mach number
Corresponding static pressure and stagnation pressure ratio;Pwx:The corresponding static pressure of replaceable little tail chamber inlet Mach number, unit is pa;Pt5x:Replaceable
The corresponding stagnation pressure of little tail chamber inlet Mach number, unit is pa;Dwx:Replaceable little tail chamber inlet diameter, unit is mm;d4kpx:Send out
Engine in the engine of all tests in motivation test bay, in addition to the maximum engine of nozzle rate of discharge
Engine throat diameter, unit be mm;
Wherein, the corresponding static pressure of replaceable little tail chamber inlet Mach number and real ring during supersonic speed engine high-altitude flight
Border pressure is identical, the outlet of the corresponding stagnation pressure of replaceable little tail chamber inlet Mach number and the nozzle of supersonic speed engine
The corresponding stagnation pressure of Mach number is identical, and the nozzle exit Mach number of supersonic speed engine is more than 1, supersonic speed engine
Nozzle exit Mach number, the corresponding stagnation pressure of nozzle exit Mach number of supersonic speed engine, supersonic speed
Real environmental pressure during engine high-altitude flight, in the engine of all tests in specific heat ratio and engine testsand, removes
The engine throat diameter of the engine beyond the maximum engine of nozzle rate of discharge is solid for supersonic speed engine
Some known parameters, the parameter in above-mentioned equation group:Mwx, π (Mwx), Pwx, Pt5x, Dwx, d4kpx, it is institute in engine testsand
Have in the engine of test, the corresponding ginseng of supersonic speed engine in addition to the maximum engine of nozzle rate of discharge
Number.
Further, the throat diameter of injection air-flow is Dakp1, a diameter of D of described injection air-flow expansion segmenta2, described
Dakp1And Da2Meet following equations group:
Pam1=Ptb1(16)
In above-mentioned equation group:Dakp1:The throat diameter of injection air-flow, unit is mm;Sakp1:The face of the venturi of injection air-flow
Long-pending, unit is mm2;Ga1:The flow of injection air-flow, unit is kg/s;Tta1:The temperature of injection air-flow, unit is K;Ptakp1:Draw
The stagnation pressure emanated in stream venturi, unit is Mpa;Ptam1:Injection air-flow corresponds in injection air-flow expansion segment outlet Mach number
Stagnation pressure, unit be Mpa;δ1:Injection air-flow is in the total pressure recovery coefficient of injection air-flow expansion segment;Pam1:Injection air-flow is in injection
The corresponding static pressure of air-flow expansion segment outlet Mach number, unit is Mpa;Ma1:Injection air-flow exports in injection air-flow expansion segment
Section Mach number;π(Ma1):Injection air-flow is in the corresponding static pressure of injection air-flow expansion segment outlet Mach number and overall pressure tatio;k:
Specific heat ratio;Ptb1:By injection air-flow stagnation pressure, unit is Mpa;Gb1:By the flow of injection air-flow, unit is kg/s;n1:Injection system
Number;Da2:The diameter of injection air-flow expansion segment, unit is mm;Sa2:The area of injection air-flow expansion segment, unit is mm2;q(Ma1):
Injection air-flow is in the corresponding velocity coeffficient of injection air-flow expansion segment outlet Mach number;Wherein, injection air-flow is in injection air-flow
Expansion segment outlet Mach number is more than 1, and described injection air-flow is in injection air-flow expansion segment outlet Mach number by known
Determine by injection air-flow stagnation pressure with by the flow of injection air-flow, described mass ratio of induced-to-inducing air is gone out in injection air-flow expansion segment by injection air-flow
The stagnation temperature of mouthful section Mach number and known injection air-flow and being determined by the stagnation temperature of injection air-flow.
Further, a diameter of D of the straight section such as described blendingckp1, length is Lckp1;Blend a diameter of D of converging portionc11,
Convergency is α1, length is Lc11;The described a diameter of D blending expansion segmenta2, the angle of flare is α2, length is Lc12;Described Dckp1,
Lckp1, Dc11, α11, Lc11, Dc12, α12, Lc12Meet following equations group:
Sckp1=Sakp1×fackp1(22)
Lckp1=4 × Dckp1(23)
Sc11=1.95 × Sckp1(25)
Dc11=Dc12(26)
In above-mentioned equation group:Dckp1:The diameter of the straight sections such as blending, unit is mm;Sckp1:The area of the straight sections such as blending, unit
For mm2;fackp1:The area ratio of straight section and the venturi of injection air-flow such as blend;Lckp1:The length of the straight sections such as blending, unit is mm;
Dc11:Blend the diameter of converging portion, unit is mm;Sc11:Blend the area of converging portion, unit is mm2;Dc12:Blend expansion segment
Diameter, unit is mm;Lc11:Blend the length of converging portion, unit is mm;α11:Blend the convergency of converging portion, unit is ° Lc12:
Blend the length of expansion segment, unit is mm;α12:Blend expansion segment the angle of flare, unit be °;Wherein, straight section and the injection such as blending
The area of the straight sections such as airflow injection air-flow determines in injection air-flow expansion segment outlet Mach number than by injection air-flow.
Further, the described convergency blending converging portion meets:4°≤α11≤ 5 °, the described angle of flare blending expansion segment
Meet:4°≤α12≤5°.
Further, a diameter of D of described low pressure room housing1, the diameter of described low pressure room housing meets equation:D1=
1.05×Dc11, wherein, D1Unit be mm;The length of described changeover portion is S1, the length of described changeover portion meets equation:S1=
D1-Dc11, wherein, S1Unit be mm.
Setting of the present invention for the tail room of engine testsand gas extraction system after, when engine export maximum flow
Test engine when being tested, the supersonic gas that nozzle outlet is discharged flow into tail room converging portion, pass through
The tail cell structure of Laval nozzle shape dress, by a series of Shock Wave, is finally reduced to subsonic speed, tail room converging portion enters a kind of horse raised north of the Grean Wall
Stagnation pressure P after the corresponding normal shock wave of conspicuous numbertw, the static pressure P in the corresponding altitude simulation cabin of tail room converging portion entrance Mach numberWAnd tail
The pressure ratio of roomMeet formula (29)-(31);
When test engine in addition to the test engine except engine export maximum flow is tested, engines tail
The supersonic gas that nozzle exit is discharged flow in corresponding replaceable little tail room, by the tail room of class Laval nozzle shape
Structure, by a series of Shock Wave, after being finally reduced to the corresponding normal shock wave of the replaceable little tail chamber inlet Mach number of subsonic speed
Stagnation pressure Ptwx, the static pressure P in the corresponding altitude simulation cabin of replaceable little tail chamber inlet Mach numberWxAnd the pressure ratio of tail room
Meet formula (32)-(35);
Wherein,For after the corresponding normal shock wave of replaceable little tail chamber inlet Mach number with normal shock wave before overall pressure tatio.
Compared with prior art, supersonic speed nozzle of the present invention is vented the exhaust apparatus tool of simulated test
There are following Advantageous Effects:
(1) pass through the tail room analogue technique of class Laval nozzle shape, under serial Shock Wave, by nozzle
Kinetic energy stagnation is got off effectively, pressure ratio more than 1 improves follow-up air-extractor and passively flows to a mouthful static pressure, reduces follow-up pumping
Pressure ratio needed for equipment, and then decrease the injector series of follow-up air-extractor or the volume of vacuum tank, reduce cost;
(2) replaceable little tail cell structure, a kind of a kind of engine little tail of corresponding replacing of nozzle size are set
Room, meets the demand of sizes engine test;
(3) by way of combining using circulating cooling and water-spraying control in fixing big tail room, improve cooling effectiveness;
(4) injector in exhaust apparatus of the present invention, by arranging changeover portion, and the outlet by low-pressure chamber
With the outlet of injection air-flow expansion segment in same vertical plane, specify that the diameter of the straight sections such as injection air-flow, injection gas simultaneously
Stream expansion segment diameter, the straight section diameter such as blending, length;Blend converging portion diameter, convergency, length;Blend expansion segment diameter, expand
Subtended angle, length;Injection air-flow expansion segment diameter, low-pressure chamber diameter, the geometrical relationship between transition section length and/or numerical value, carry
The high injection performance of injector;
(5) pass through tail room travel(l)ing rest, injector travel(l)ing rest and expansion bellows that setting has roll wheel assembly, inhale
Receive the axial length change that metallic conduit causes due to expanding with heat and contract with cold.
Brief description
The invention will be further described with reference to the accompanying drawings and detailed description.
Fig. 1 is the schematic diagram of the exhaust apparatus that supersonic speed nozzle of the present invention is vented simulated test.
Fig. 2 is the tail chamber interior structural representation of the exhaust apparatus that supersonic speed nozzle of the present invention is vented simulated test
Figure.
Fig. 3 is the tail outdoor structural representation of the exhaust apparatus that supersonic speed nozzle of the present invention is vented simulated test
Figure.
Fig. 4 is the sectional view in Fig. 2 along A-A.
Fig. 5 is the structure of the tail room converging portion of exhaust apparatus that supersonic speed nozzle of the present invention is vented simulated test
Schematic diagram.
Fig. 6 is the zoomed-in view in A portion in Fig. 5.
Fig. 7 is the zoomed-in view in B portion in Fig. 5.
Fig. 8 is the sectional view in Fig. 5 along B-B.
Fig. 9 is the zoomed-in view in C portion in Fig. 8.
Figure 10 is the knot of the straight sections such as the tail room of exhaust apparatus that supersonic speed nozzle of the present invention is vented simulated test
Structure schematic diagram.
Figure 11 is the zoomed-in view in D portion in Figure 10.
Figure 12 is the zoomed-in view in E portion in Figure 10.
Figure 13 is the knot of the tail room expansion segment of exhaust apparatus that supersonic speed nozzle of the present invention is vented simulated test
Structure schematic diagram.
Figure 14 is the zoomed-in view in F portion in Figure 13.
Figure 15 is the zoomed-in view in G portion in Figure 13.
Figure 16 is the replaceable little tail room of exhaust apparatus that supersonic speed nozzle of the present invention is vented simulated test
Structural representation.
Figure 17 is the tail room travel(l)ing rest of exhaust apparatus that supersonic speed nozzle of the present invention is vented simulated test
Front view.
Figure 18 is the tail room travel(l)ing rest of exhaust apparatus that supersonic speed nozzle of the present invention is vented simulated test
Left view.
Figure 19 is the tail room travel(l)ing rest of exhaust apparatus that supersonic speed nozzle of the present invention is vented simulated test
Tail room roll wheel assembly schematic diagram.
Figure 20 is the schematic diagram of the injector of exhaust apparatus that supersonic speed nozzle of the present invention is vented simulated test.
Figure 21 is the sectional view in Figure 20 along C-C.
Figure 22 is the schematic diagram of the low-pressure chamber of exhaust apparatus that supersonic speed nozzle of the present invention is vented simulated test.
Figure 23 is the injector travel(l)ing rest of the exhaust apparatus that supersonic speed nozzle of the present invention is vented simulated test
Front view.
Figure 24 is the injector travel(l)ing rest of the exhaust apparatus that supersonic speed nozzle of the present invention is vented simulated test
Left view.
Figure 25 is the injector travel(l)ing rest of the exhaust apparatus that supersonic speed nozzle of the present invention is vented simulated test
The schematic diagram of roll wheel assembly.
Specific embodiment
Referring to Fig. 1-2 5, a kind of supersonic speed nozzle is vented the exhaust apparatus of simulated test, according to engines tail
Jet pipe 3 exiting exhaust gas flow direction, described exhaust apparatus includes the tail room being coaxially fixedly connected sequentially and injector 100, described
Tail room includes fixing big tail room and replaceable little tail room 50, according to nozzle 3 exiting exhaust gas flow direction, described fixation
Big tail room includes coaxially passing sequentially through the tail room converging portion 20 that flange is fixedly connected, the straight section such as tail room 30 and tail room expansion segment 40,
Described replaceable little tail room 50 includes the little tail room flange 52 being fixedly and coaxially connected and little tail room cylinder 51, described little tail room cylinder
51 are arranged on described tail room converging portion 20 in coaxial with described tail room converging portion 20, described little tail room flange 52 and described tail room
The flange of converging portion 20 entrance connects;The big tail room of described fixation is fixing with the tail room support 70 being arranged in altitude simulation cabin 1 even
Connect, straight section 30 outlet(discharge) flange such as described tail room with expand bellows 4 one end flange is connected, described expansion bellows 4 another
End is fixedly connected with altitude simulation cabin 1;The straight sections 30 such as described tail room converging portion 20, tail room, tail room expansion segment 40 and replaceable little
Tail room 50 is hollow revolving body;There is the engine 2 of nozzle 3 and described tail room converging portion 20 is arranged on high-altitude mould
Intend in cabin 1, described engine 2 is supersonic speed engine;Described tail room converging portion 20, the straight section such as tail room 30 and tail room expansion segment 40
It is equipped with recirculated cooling water device and cooling water water injector;According to by the flow direction of injection air-flow, described injector 100 wraps
Include the low-pressure chamber 110 being sequentially coaxially fixedly connected, changeover portion 120, blend converging portion 130, the straight section 140 such as blending, blend expansion
Section 150, described low-pressure chamber 110 includes low pressure room housing 112 and the flange being fixedly connected with low pressure room housing 112 two ends, described
Sequentially coaxially it is fixedly connected with annulus shunting guiding device 113, injection according to by the flow direction of injection air-flow in low-pressure chamber 110
Airflow pipeline 117, injection air-flow converging portion 114, injection air-flow expansion segment 115, described annulus shunting guiding device 113 enters
Mouth is fixedly connected with injection air-flow inlet manifold 111, and outlet is fixedly connected with the entrance of injection airflow pipeline 117, described
Low pressure room housing 112, changeover portion 120, blend converging portion 130, the straight section 140 such as blending, blend expansion segment 150, injection air-flow is defeated
Send pipeline 117, injection air-flow converging portion 114, injection air-flow expansion segment 115 is hollow revolving body, described injection air-flow conveying
The center line of pipeline 117 is overlapped with the center line of described low pressure room housing 112, and described low-pressure chamber 110 outlet is drawn with described
Emanate the outlet flowing expansion segment 115 in same vertical plane, described low-pressure chamber 110 is connected with injector fixed support 160, institute
State the straight sections such as blending 140 to be connected with injector travel(l)ing rest 170;The outlet of described tail room expansion segment 40 is entered with low-pressure chamber 110
Mouth is fixedly connected, and described blending expansion segment 150 is arranged on outside altitude simulation cabin 1,.
Preferably, described annulus shunting guiding device 113 one end is fixedly connected with deflection cone 116, described deflection cone 116
The center line that center line shunts guiding device 113 with described annulus overlaps, and the summit of described deflection cone 116 is in described low-pressure chamber
On 110 entrance sections.
Preferably, described tail room converging portion 20 includes tail room converging portion recirculated water and enters water ring 21, tail room converging portion recirculated water
Draining ring 22, tail room converging portion circulates water ring 23, tail room converging portion water ring 24, tail room converging portion inner core 25, tail room converging portion
Outer tube 26;Pass through axially arranged tail room converging portion reinforcing bar between described tail room converging portion inner core 25 and tail room converging portion outer tube 26
27 are fixedly connected, and described tail room converging portion recirculated water enters the flange that water ring 21 one end exported with tail room converging portion 20 and is fixedly connected,
The other end is fixedly connected with tail room converging portion outer tube 26, described tail room converging portion recirculated water draining ring 22 one end and tail room converging portion
The flange of 20 imports is fixedly connected, and the other end is fixedly connected with tail room converging portion outer tube 26, and described tail room converging portion recirculated water enters
It is provided with tail room converging portion circulation water ring 23 and the spray of tail room converging portion between water ring 21 and tail room converging portion recirculated water draining ring 22
Water ring 24, described tail room converging portion circulation water ring 23 and tail room converging portion water ring 24 are arranged alternately in the axial direction successively, described
It is provided with nozzle 60, described nozzle 60 sequentially passes through tail room converging portion outer tube 26 and described tail room in tail room converging portion water ring 24
Converging portion inner core 25, described tail room converging portion recirculated water enters the circumference that water ring 21 and tail room converging portion recirculated water draining ring 22 are located
On, tail room converging portion outer tube 26 is respectively arranged with recirculated water inlet opening and recirculated water osculum, and recirculated water passes through described recirculated water
Inlet opening is entered the interlayer between described tail room converging portion inner core 25 and tail room converging portion outer tube 26 and is received in tail room by interlayer
Enter tail room converging portion recirculated water draining ring 22 after holding back section circulation water ring 23 flowing and discharged by described recirculated water osculum;Institute
State tail room converging portion recirculated water and enter water ring 21, tail room converging portion recirculated water draining ring 22 is provided with circulating water pipe joint 5, described
Cooling water spray pipe joint 6 is provided with tail room converging portion water ring 24;
The straight sections 30 such as described tail room include the straight section recirculated water such as tail room and enter water ring 31, the straight section recirculated water draining ring such as tail room
32, the straight section such as tail room circulates water ring 33, the straight section water ring such as tail room 34, the straight section inner core such as tail room 35, the straight section outer tube such as tail room 36;
Pass through the straight section reinforcing bars 37 such as axially arranged tail room fixing between the straight section outer tube such as straight section inner core 35 and tail room such as described tail room 36
Connect, the straight section recirculated water such as described tail room is entered water ring 31 one end and is fixedly connected with the flange of the straight sections such as tail room 30 import, the other end
It is fixedly connected with straight section outer tube 36 such as tail rooms, the straight section recirculated water draining ring such as described tail room 32 one end is exported with the straight sections such as tail room 30
Flange be fixedly connected, the other end is fixedly connected with straight section outer tube 36 such as tail rooms, and the straight section recirculated water such as described tail room enters water ring 31
It is provided with the straight sections such as the tail room circulation straight section water ring such as water ring 33 and tail room 34 and the straight section recirculated water draining ring 32 such as tail room between,
The straight sections such as the described tail room circulation straight section water ring such as water ring 33 and tail room 34 is arranged alternately in the axial direction successively, and described tail room etc. is straight
It is provided with nozzle 60, described nozzle 60 sequentially passes through in the straight section such as the straight section outer tube such as tail room 36 and described tail room in section water ring 34
Cylinder 35, the straight section recirculated water such as described tail room enters on the circumference at the straight section recirculated water draining ring such as water ring 31 and tail room 32 place, tail room
It is respectively arranged with recirculated water inlet opening and recirculated water osculum Deng straight section outer tube 36, recirculated water is entered by described recirculated water inlet opening
Enter the interlayer between the straight section outer tube such as straight section inner core 35 and tail room such as described tail room 36 and circulated in straight sections such as tail rooms by interlayer
Enter the straight section recirculated water draining rings 32 such as tail room after water ring 33 flowing and discharged by described recirculated water osculum;Described tail room etc.
Straight section recirculated water enters water ring 31, and the straight section recirculated water draining ring such as tail room 32 is provided with circulating water pipe joint 5, and described tail room etc. is straight
Cooling water spray pipe joint 6 is provided with section water ring 34;
Described tail room expansion segment 40 includes tail room expansion segment recirculated water and enters water ring 41, tail room expansion segment recirculated water draining ring
42, tail room expansion segment circulates water ring 43, tail room expansion segment water ring 44, tail room expansion segment inner core 45, tail room expansion segment outer tube 46;
Pass through axially arranged tail room expansion segment reinforcing bar 47 fixing between described tail room expansion segment inner core 45 and tail room expansion segment outer tube 46
Connect, described tail room expansion segment recirculated water is entered water ring 41 one end and is fixedly connected with the flange of tail room expansion segment 40 import, the other end
It is fixedly connected with tail room expansion segment outer tube 46, described tail room expansion segment recirculated water draining ring 42 one end is exported with tail room expansion segment 40
Flange be fixedly connected, the other end is fixedly connected with tail room expansion segment outer tube 46, and described tail room expansion segment recirculated water enters water ring 41
It is provided with tail room expansion segment circulation water ring 43 and tail room expansion segment water ring 44 and tail room expansion segment recirculated water draining ring 42 between,
Described tail room expansion segment circulation water ring 43 and tail room expansion segment water ring 44 are arranged alternately in the axial direction successively, the expansion of described tail room
It is provided with nozzle 60, described nozzle 60 sequentially passes through in tail room expansion segment outer tube 46 and described tail room expansion segment in section water ring 44
Cylinder 45, described tail room expansion segment recirculated water enters on the circumference that water ring 41 and tail room expansion segment recirculated water draining ring 42 are located, tail room
Expansion segment outer tube 46 is respectively arranged with recirculated water inlet opening and recirculated water osculum, and recirculated water is entered by described recirculated water inlet opening
Enter the interlayer between described tail room expansion segment inner core 45 and tail room expansion segment outer tube 46 and circulated in tail room expansion segment by interlayer
Enter tail room expansion segment recirculated water draining ring 42 after water ring 43 flowing and discharged by described recirculated water osculum;Described tail room is expanded
Open section recirculated water and enter water ring 41, tail room expansion segment recirculated water draining ring 42 is provided with circulating water pipe joint 5, the expansion of described tail room
Cooling water spray pipe joint 6 is provided with section water ring 44.
Preferably, described tail room support 70 includes tail room bracket holder 71, tail room scaffold bracket 72, and tail room support guides
Seat 73, tail room support base plate 76, tail room support upper roller guide plate 77, tail room support bottom roller guide plate 78, tail room support rolls
Wheel assembly 79, tail room support fixed support 80;Described tail room bracket holder 71 is fixedly connected with described tail room scaffold bracket 72,
Described tail room bracket holder 71 is provided with the through hole corresponding with the flange hole of straight section 30 entrances such as described tail room;Described fixation
The tail room bracket holder 71 connecting is fixedly connected with tail room support base plate 76 with tail room scaffold bracket 72 lower end, and described tail room is propped up
Frame base plate 76 upper surface is fixedly installed tail room support guide holder 73, and described tail room support guide holder 73 is 2, each described tail
Pin-and-hole 74 is provided with room support guide holder 73, alignment pin 75 is each passed through the pin-and-hole on 2 described tail room support guide holders 73
2 described tail room support guide holders 73 are connected by 74;Described tail room support base plate 76 lower surface is provided with tail room support upper roller
Guide plate 77, described tail room support fixed support 80 bottom is fixedly installed in altitude simulation cabin 1, fixing of described tail room support
Frame 80 upper surface is fixedly connected with described tail room support bottom roller guide plate 78 lower surface;Described tail room support roll wheel assembly 79 sets
Put between described tail room support upper roller guide plate 77 and described tail room support bottom roller guide plate 78, described tail room support rolls
Wheel assembly 79 includes tail room support roller 81 and tail room Support frame 82, and described tail room support roller 81 is arranged on tail room stand frame
In frame 82, between the described tail room bracket holder 71 being fixedly connected and tail room scaffold bracket 72 and described tail room support base plate 76
It is provided with tail room support reinforcement 83;
Described injector travel(l)ing rest 170 includes injector travel(l)ing rest upper bracket 171, injector travel(l)ing rest base plate
172, injector travel(l)ing rest upper roller guide plate 173, injector travel(l)ing rest bottom roller guide plate 174, injector activity
Frame roll wheel assembly 175, injector travel(l)ing rest lower carriage 177;Described injector travel(l)ing rest upper bracket 171 and the straight sections such as blending
140 are fixedly connected, and described injector travel(l)ing rest base plate 172 upper surface is fixedly connected with injector travel(l)ing rest upper bracket 171;
Described injector travel(l)ing rest base plate 172 lower surface is provided with injector travel(l)ing rest upper roller guide plate 173, described injector
Travel(l)ing rest fixed support 177 upper surface is fixedly connected with described injector travel(l)ing rest bottom roller guide plate 174 lower surface;Institute
State injector travel(l)ing rest roll wheel assembly 175 and be arranged on described injector travel(l)ing rest upper roller guide plate 173 and described injection
Between device travel(l)ing rest bottom roller guide plate 174, described injector travel(l)ing rest base plate 172 and injector travel(l)ing rest lower carriage
It is fixedly connected by turnbuckle 176 between 177;Described injector travel(l)ing rest roll wheel assembly 175 includes injector activity
Frame roller 178 and injector travel(l)ing rest framework 179, described injector travel(l)ing rest roller 178 is arranged on injector activity
In frame framework 179;It is provided between described injector travel(l)ing rest upper bracket 171 and described injector travel(l)ing rest base plate 172
Reinforcement 180;Described injector travel(l)ing rest fixed support 177 bottom is fixed with ground by foundation bolt.
Preferably, a diameter of D of described tail room converging portion 20 entrancew, convergency is αwr;The straight sections 30 such as described tail room straight
Footpath Dwkp, length is Lwkp;A diameter of D of described tail room expansion segment 40 outletwc, the angle of flare is αwc;Described Dw, Dwkp, LwkpMeet
Following equations group:
Lwkp=4Dwkp(7);
In above-mentioned equation group:Mw:Tail room converging portion entrance Mach number;k:Specific heat ratio;π(Mw):Tail room converging portion entrance Mach
The corresponding static pressure of number and stagnation pressure ratio;Pw:The corresponding static pressure of tail room converging portion entrance Mach number, unit is pa;Pt5:Tail room is restrained
The section corresponding stagnation pressure of entrance Mach number, unit is pa;Dw:The diameter of tail room converging portion entrance, unit is mm;d4kp:Engine larynx
Road diameter, unit is mm;After the corresponding normal shock wave of tail room converging portion entrance Mach number with normal shock wave before overall pressure tatio;q
(Mw):The corresponding velocity coeffficient of tail room converging portion entrance Mach number;Dwkp:The diameter of the straight sections such as tail room, unit is mm;Lwkp:Tail
The length of the straight sections such as room, unit is mm;
Wherein, real environment when the corresponding static pressure of tail room converging portion entrance Mach number and supersonic speed engine high-altitude flight
Pressure is identical, the outlet Mach of the nozzle of the corresponding stagnation pressure of tail room converging portion entrance Mach number and supersonic speed engine
The corresponding stagnation pressures of number are identical, and the nozzle exit Mach number of supersonic speed engine is more than 1, the starting of supersonic speed engine
Tail nozzle exit Mach number, the corresponding stagnation pressure of nozzle exit Mach number of supersonic speed engine, supersonic speed is started
Real environmental pressure during machine high-altitude flight, specific heat ratio and engine throat diameter are the intrinsic known ginseng of supersonic speed engine
Number, the parameter in above-mentioned equation group:Mw, k, π (Mw), Pw, Pt5, Ww, d4kp,q(Mw), Dwkp, LwkpIt is engine testsand
In all tests engine in, the maximum corresponding parameter of engine of nozzle rate of discharge;
Described convergency meets:0 < αwr≤12°;The described angle of flare meets 0 < αwc≤12°.
Preferably, a diameter of D of described replaceable little tail room 50wx, described DwxMeet following equations group:
In above-mentioned equation group:Mwx:Replaceable little tail chamber inlet Mach number;π(Mwx):Replaceable little tail chamber inlet Mach number
Corresponding static pressure and stagnation pressure ratio;Pwx:The corresponding static pressure of replaceable little tail chamber inlet Mach number, unit is pa;Pt5x:Replaceable
The corresponding stagnation pressure of little tail chamber inlet Mach number, unit is pa;Dwx:Replaceable little tail chamber inlet diameter, unit is mm;d4kpx:Send out
Engine in the engine of all tests in motivation test bay, in addition to the maximum engine of nozzle rate of discharge
Engine throat diameter, unit be mm;
Wherein, the corresponding static pressure of replaceable little tail chamber inlet Mach number and real ring during supersonic speed engine high-altitude flight
Border pressure is identical, the outlet of the corresponding stagnation pressure of replaceable little tail chamber inlet Mach number and the nozzle of supersonic speed engine
The corresponding stagnation pressure of Mach number is identical, and the nozzle exit Mach number of supersonic speed engine is more than 1, supersonic speed engine
Nozzle exit Mach number, the corresponding stagnation pressure of nozzle exit Mach number of supersonic speed engine, supersonic speed
Real environmental pressure during engine high-altitude flight, in the engine of all tests in specific heat ratio and engine testsand, removes
The engine throat diameter of the engine beyond the maximum engine of nozzle rate of discharge is solid for supersonic speed engine
Some known parameters, the parameter in above-mentioned equation group:Mwx, π (Mwx), Pwx, Pt5x, Dwx, d4kpx, it is institute in engine testsand
Have in the engine of test, the corresponding ginseng of supersonic speed engine in addition to the maximum engine of nozzle rate of discharge
Number.
Preferably, the throat diameter of injection air-flow is Dakp1, a diameter of D of described injection air-flow expansion segment 115a2, described
Dakp1And Da2Meet following equations group:
Pam1=Ptb1(16)
In above-mentioned equation group:Dakp1:The throat diameter of injection air-flow, unit is mm;Sakp1:The face of the venturi of injection air-flow
Long-pending, unit is mm2;Ga1:The flow of injection air-flow, unit is kg/s;Tta1:The temperature of injection air-flow, unit is K;Ptakp1:Draw
The stagnation pressure emanated in stream venturi, unit is Mpa;Ptam1:Injection air-flow corresponds in injection air-flow expansion segment outlet Mach number
Stagnation pressure, unit be Mpa;δ1:Injection air-flow is in the total pressure recovery coefficient of injection air-flow expansion segment;Pam1:Injection air-flow is in injection
The corresponding static pressure of air-flow expansion segment outlet Mach number, unit is Mpa;Ma1:Injection air-flow exports in injection air-flow expansion segment
Section Mach number;π(Ma1):Injection air-flow is in the corresponding static pressure of injection air-flow expansion segment outlet Mach number and overall pressure tatio;k:
Specific heat ratio;Ptb1:By injection air-flow stagnation pressure, unit is Mpa;Gb1:By the flow of injection air-flow, unit is kg/s;n1:Injection system
Number;Da2:The diameter of injection air-flow expansion segment, unit is mm;Sa2:The area of injection air-flow expansion segment, unit is mm2;q(Ma1):
Injection air-flow is in the corresponding velocity coeffficient of injection air-flow expansion segment outlet Mach number;Wherein, injection air-flow is in injection air-flow
Expansion segment outlet Mach number is more than 1, and described injection air-flow is in injection air-flow expansion segment outlet Mach number by known
Determine by injection air-flow stagnation pressure with by the flow of injection air-flow, described mass ratio of induced-to-inducing air is gone out in injection air-flow expansion segment by injection air-flow
The stagnation temperature of mouthful section Mach number and known injection air-flow and being determined by the stagnation temperature of injection air-flow.
Preferably, a diameter of D of the straight section 140 such as described blendingckp1, length is Lckp1;Blend a diameter of of converging portion 130
Dc11, convergency is α1, length is Lc11;The described a diameter of D blending expansion segment 150a2, the angle of flare is α2, length is Lc12;Institute
State Dckp1, Lckp1, Dc11, α11, Lc11, Dc12, α12, Lc12Meet following equations group:
Sckp1=Sakp1×fackp1(22)
Lckp1=4 × Dckp1(23)
Sc11=1.95 × Sckp1(25)
Dc11=Dc12(26)
In above-mentioned equation group:Dckp1:The diameter of the straight sections such as blending, unit is mm;Sckp1:The area of the straight sections such as blending, unit
For mm2;fackp1:The area ratio of straight section and the venturi of injection air-flow such as blend;Lckp1:The length of the straight sections such as blending, unit is mm;
Dc11:Blend the diameter of converging portion, unit is mm;Sc11:Blend the area of converging portion, unit is mm2;Dc12:Blend expansion segment
Diameter, unit is mm;Lc11:Blend the length of converging portion, unit is mm;α11:Blend the convergency of converging portion, unit is ° Lc12:
Blend the length of expansion segment, unit is mm;α12:Blend expansion segment the angle of flare, unit be °;Wherein, straight section and the injection such as blending
The area of the straight sections such as airflow injection air-flow determines in injection air-flow expansion segment outlet Mach number than by injection air-flow.
Preferably, the described convergency blending converging portion meets:4°≤α11≤ 5 °, the described angle of flare blending expansion segment is completely
Foot:4°≤α12≤5°;Preferably, the angle of flare of the described convergency blending converging portion and blending expansion segment is 4.4 °.
Preferably, a diameter of D of described low pressure room housing 1121, the diameter of described low pressure room housing 112 meets equation:D1
=1.05 × Dc11, wherein, D1Unit be mm;The length of described changeover portion 120 is S1, the length satisfaction of described changeover portion 120
Equation:S1=D1-Dc11, wherein, S1Unit be mm.
Setting of the present invention for the tail room of engine testsand gas extraction system after, when engine export maximum flow
Test engine when being tested, the supersonic gas that nozzle outlet is discharged flow into tail room converging portion, pass through
The tail cell structure of Laval nozzle shape dress, by a series of Shock Wave, is finally reduced to subsonic speed, tail room converging portion enters a kind of horse raised north of the Grean Wall
Stagnation pressure P after the corresponding normal shock wave of conspicuous numbertw, the static pressure P in the corresponding altitude simulation cabin of tail room converging portion entrance Mach numberWAnd tail
The pressure ratio of roomMeet formula (29)-(31);
When test engine in addition to the test engine except engine export maximum flow is tested, engines tail
The supersonic gas that nozzle exit is discharged flow in corresponding replaceable little tail room, by the tail room of class Laval nozzle shape
Structure, by a series of Shock Wave, is finally reduced to subsonic speed, after the corresponding normal shock wave of replaceable little tail chamber inlet Mach number
Stagnation pressure Ptwx, the static pressure P of the corresponding stratochamber of replaceable little tail chamber inlet Mach numberWxAnd the pressure ratio of tail roomMeet
Formula (32)-(35);
Wherein,For after the corresponding normal shock wave of replaceable little tail chamber inlet Mach number with normal shock wave before overall pressure tatio.
The operation principle that supersonic speed nozzle of the present invention is vented the exhaust apparatus of simulated test is:First,
Gases at high pressure in high-pressure air source enter injection air-flow input section by injection airflow pipeline, by the height in high-pressure air source
Calm the anger body by the gas injection in altitude simulation cabin to simulated altitude out of my cabin so that the pressure in simulated altitude cabin reaches supersonic speed
The true environment pressure of engine flight height;Then, open to be arranged on and be used for cooling down nozzle on fixing big tail room
The equipment water jetting cooler of exiting exhaust gas, simultaneously by supersonic speed engine ignition, is simulated test, supersonic speed nozzle
The gas discharged sequentially passes through tail room and injector thus discharging altitude simulation cabin, and the pressure ratio more than 1 improves injector and enters
Mouth passively flows to a mouthful static pressure, reduces the pressure ratio of injector, and then decreases the quantity of injector;High pressure in high-pressure air source
Gas enters injection air-flow input section by injection airflow pipeline, and described gases at high pressure are through class Laval nozzle shape
Injection air-flow converging portion, the straight section such as injection air-flow, form supersonic speed high pressure draught after injection air-flow expansion segment, and then injection edge is led
The low pressure that flow cone enters from low pressure chamber inlet by injection air-flow, the supersonic speed injection air-flow of high pressure and low pressure by injection air-flow
In the blending converging portion of class Laval nozzle shape, the straight section such as blending, blend expansion segment and be sufficiently mixed, improve by injection air-flow
Static pressure thus the air in simulated altitude cabin being entered muffling device, sterilizing equipment decontaminating apparatus or being directly discharged in air.
Finally illustrate, above example is merely to illustrate technical scheme and unrestricted, although with reference to relatively
Good embodiment has been described in detail to the present invention, it will be understood by those of skill in the art that can be to the technology of the present invention
Scheme is modified and equivalent substitute, the objective without deviating from technical solution of the present invention and scope, and it all should be covered in the present invention
Right in the middle of.
Claims (10)
1. a kind of supersonic speed nozzle is vented the exhaust apparatus of simulated test it is characterised in that spraying according to engines tail
Pipe (3) exiting exhaust gas flow direction, described exhaust apparatus includes the tail room being coaxially fixedly connected sequentially and injector (100), institute
State tail room and include fixing big tail room and replaceable little tail room (50), according to nozzle (3) exiting exhaust gas flow direction, institute
State fixing big tail room to include coaxially passing sequentially through tail room converging portion (20) that flange is fixedly connected, the straight section such as tail room (30) and tail room
Expansion segment (40), described replaceable little tail room (50) includes little tail room flange (52) and the little tail room cylinder being fixedly and coaxially connected
(51) what, described little tail room cylinder (51) was coaxial with described tail room converging portion (20) is arranged in described tail room converging portion (20),
The flange of described little tail room flange (52) and described tail room converging portion (20) entrance connects;The big tail room of described fixation be arranged on height
Tail room support (70) in empty boiler-plate (1) is fixedly connected, straight section (30) outlet(discharge) flange such as described tail room with expand bellows (4)
The flange of one end connects, and the described other end expanding bellows (4) is fixedly connected with altitude simulation cabin (1);The convergence of described tail room
Straight section (30), tail room expansion segment (40) and the replaceable little tail rooms (50) such as section (20), tail room are hollow revolving body;Have and start
The engine (2) of tail jet pipe (3) and described tail room converging portion (20) are arranged in altitude simulation cabin (1), described engine (2)
For supersonic speed engine;It is cold that described tail room converging portion (20), the straight section such as tail room (30) and tail room expansion segment (40) are equipped with circulation
But water installations and cooling water water injector;According to by the flow direction of injection air-flow, described injector (100) is included sequentially coaxially
The low-pressure chamber (110) being fixedly connected, changeover portion (120), blend converging portion (130), the straight section (140) such as blending, blend expansion segment
(150), described low-pressure chamber (110) includes low pressure room housing (112) and the method being fixedly connected with low pressure room housing (112) two ends
Orchid, fills according to being sequentially coaxially fixedly connected with annulus shunting water conservancy diversion by the flow direction of injection air-flow in described low-pressure chamber (110)
Put (113), injection airflow pipeline (117), injection air-flow converging portion (114), injection air-flow expansion segment (115), described circle
Ring shunting guiding device (113) entrance is fixedly connected with injection air-flow inlet manifold (111), exports and injection airflow pipeline
(117) entrance is fixedly connected, described low pressure room housing (112), changeover portion (120), blends converging portion (130), and blending etc. is straight
Section (140), blends expansion segment (150), injection airflow pipeline (117), injection air-flow converging portion (114), injection air-flow expands
Open section (115) and be hollow revolving body, the center line of described injection airflow pipeline (117) and described low pressure room housing
(112) center line overlaps, the outlet of described low-pressure chamber (110) outlet and described injection air-flow expansion segment (115)
In same vertical plane, described low-pressure chamber (110) is connected with injector fixed support (160), described blend etc. straight section (140) with draw
Emitter travel(l)ing rest (170) connects;The outlet of described tail room expansion segment (40) is fixedly connected with the entrance of low-pressure chamber (110), institute
State blending expansion segment (150) and be arranged on altitude simulation cabin (1) outward.
2. exhaust apparatus according to claim 1 is it is characterised in that described annulus shunting guiding device (113) one end is solid
Surely it is connected with deflection cone (116), the center line of described deflection cone (116) shunts the center of guiding device (113) with described annulus
Line overlaps, and the summit of described deflection cone (116) is on described low-pressure chamber (110) entrance section.
3. exhaust apparatus according to claim 1 is it is characterised in that described tail room converging portion (20) includes tail room converging portion
Recirculated water enters water ring (21), tail room converging portion recirculated water draining ring (22), tail room converging portion circulation water ring (23), tail room converging portion
Water ring (24), tail room converging portion inner core (25), tail room converging portion outer tube (26);Described tail room converging portion inner core (25) and tail room
It is fixedly connected by axially arranged tail room converging portion reinforcing bar (27) between converging portion outer tube (26), described tail room converging portion circulates
Water enters the flange that water ring (21) one end exported with tail room converging portion (20) and is fixedly connected, the other end and tail room converging portion outer tube (26)
It is fixedly connected, described tail room converging portion recirculated water draining ring (22) one end is fixing with the flange of tail room converging portion (20) import even
Connect, the other end is fixedly connected with tail room converging portion outer tube (26), described tail room converging portion recirculated water enters water ring (21) and tail room is received
Hold back and between section recirculated water draining ring (22), be provided with tail room converging portion circulation water ring (23) and tail room converging portion water ring (24), institute
State tail room converging portion circulation water ring (23) and tail room converging portion water ring (24) is arranged alternately in the axial direction successively, described tail room is received
Hold back and in a section water ring (24), be provided with nozzle (60), described nozzle (60) sequentially passes through tail room converging portion outer tube (26) and described tail
Room converging portion inner core (25), described tail room converging portion recirculated water enters water ring (21) and tail room converging portion recirculated water draining ring (22) institute
Circumference on, tail room converging portion outer tube (26) is respectively arranged with recirculated water inlet opening and recirculated water osculum, and recirculated water passes through
Described recirculated water inlet opening enters the interlayer between described tail room converging portion inner core (25) and tail room converging portion outer tube (26) and leads to
Cross interlayer and enter tail room converging portion recirculated water draining ring (22) after tail room converging portion circulation water ring (23) flowing and by described
Recirculated water osculum is discharged;Described tail room converging portion recirculated water enters water ring (21), on tail room converging portion recirculated water draining ring (22)
It is provided with circulating water pipe joint (5), described tail room converging portion water ring (24) is provided with cooling water spray pipe joint (6);
The straight section such as described tail room (30) includes the straight section recirculated waters such as tail room and enters water ring (31), the straight section recirculated water draining ring such as tail room
(32), the straight section such as tail room circulation water ring (33), the straight section water ring such as tail room (34), the straight section inner core such as tail room (35), tail room etc. is straight
Section outer tube (36);Pass through axially arranged tail room etc. between the straight section outer tube such as the straight section inner core such as described tail room (35) and tail room (36)
Straight section reinforcing bar (37) is fixedly connected, and the straight section recirculated water such as described tail room enters water ring (31) one end and straight section (30) imports such as tail room
Flange is fixedly connected, and the other end is fixedly connected with straight section outer tube (36) such as tail rooms, the straight section recirculated water draining ring such as described tail room
(32) flange that one end is exported with the straight sections such as tail room (30) is fixedly connected, and the other end is fixing with straight section outer tube (36) such as tail rooms even
Connect, the straight section recirculated water such as described tail room enters and is provided with tail room etc. between straight section recirculated water draining ring such as water ring (31) and tail room (32)
The straight section water ring (34) such as straight section circulation water ring (33) and tail room, the straight section such as the straight section such as described tail room circulation water ring (33) and tail room
Water ring (34) is arranged alternately in the axial direction successively, is provided with nozzle (60) in the straight section water ring such as described tail room (34), described
Nozzle (60) sequentially passes through the straight section inner core such as the straight section outer tube such as tail room (36) and described tail room (35), and the straight section such as described tail room circulates
Water enters on the circumference that straight section recirculated water draining ring such as water ring (31) and tail room (32) are located, and the straight section outer tube such as tail room (36) sets respectively
It is equipped with recirculated water inlet opening and recirculated water osculum, recirculated water passes through described recirculated water inlet opening and enters in the straight sections such as described tail room
Interlayer between the cylinder straight section outer tube such as (35) and tail room (36) and by interlayer after the straight sections such as tail room circulation water ring (33) flow
Enter straight sections recirculated water draining ring (32) such as tail room and discharged by described recirculated water osculum;The straight section recirculated waters such as described tail room
Enter water ring (31), straight section recirculated water draining ring such as tail room (32) is provided with circulating water pipe joint (5), the straight section such as described tail room sprays
Cooling water spray pipe joint (6) is provided with water ring (34);
Described tail room expansion segment (40) includes tail room expansion segment recirculated water and enters water ring (41), tail room expansion segment recirculated water draining ring
(42), tail room expansion segment circulation water ring (43), tail room expansion segment water ring (44), tail room expansion segment inner core (45), tail room is expanded
Section outer tube (46);Pass through axially arranged tail room between described tail room expansion segment inner core (45) and tail room expansion segment outer tube (46) to expand
Open section reinforcing bar (47) to be fixedly connected, described tail room expansion segment recirculated water enters water ring (41) one end and expansion segment (40) import of tail room
Flange is fixedly connected, and the other end is fixedly connected with tail room expansion segment outer tube (46), described tail room expansion segment recirculated water draining ring
(42) flange that one end is exported with tail room expansion segment (40) is fixedly connected, and the other end is fixing with tail room expansion segment outer tube (46) even
Connect, described tail room expansion segment recirculated water enters to be provided with tail room between water ring (41) and tail room expansion segment recirculated water draining ring (42) and expands
Open section circulation water ring (43) and tail room expansion segment water ring (44), described tail room expansion segment circulation water ring (43) and tail room expansion segment
Water ring (44) is arranged alternately in the axial direction successively, is provided with nozzle (60) in described tail room expansion segment water ring (44), described
Nozzle (60) sequentially passes through tail room expansion segment outer tube (46) and described tail room expansion segment inner core (45), and described tail room expansion segment circulates
Water enters on the circumference that water ring (41) and tail room expansion segment recirculated water draining ring (42) are located, and tail room expansion segment outer tube (46) sets respectively
It is equipped with recirculated water inlet opening and recirculated water osculum, recirculated water passes through described recirculated water inlet opening and enters in the expansion segment of described tail room
Cylinder (45) and tail room expansion segment outer tube (46) between interlayer and by interlayer tail room expansion segment circulation water ring (43) flow after
Enter tail room expansion segment recirculated water draining ring (42) and discharged by described recirculated water osculum;Described tail room expansion segment recirculated water
Enter water ring (41), tail room expansion segment recirculated water draining ring (42) is provided with circulating water pipe joint (5), described tail room expansion segment sprays
Cooling water spray pipe joint (6) is provided with water ring (44).
4. exhaust apparatus according to claim 1 is it is characterised in that described tail room support (70) inclusion tail room support is fixed
Frame (71), tail room scaffold bracket (72), tail room support guide holder (73), tail room support base plate (76), tail room support upper roller is led
To plate (77), tail room support bottom roller guide plate (78), tail room support roll wheel assembly (79), tail room support fixed support (80);
Described tail room bracket holder (71) is fixedly connected with described tail room scaffold bracket (72), and described tail room bracket holder (71) sets
It is equipped with the through hole corresponding with the flange hole of straight section (30) entrances such as described tail room;The described tail room bracket holder being fixedly connected
(71) it is fixedly connected with tail room support base plate (76) with tail room scaffold bracket (72) lower end, described tail room support base plate (76) upper table
Face is fixedly installed tail room support guide holder (73), and described tail room support guide holder (73) is 2, and each described tail room support is led
Pin-and-hole (74) is provided with seat (73), alignment pin (75) is each passed through the pin-and-hole on 2 described tail rooms support guide holder (73)
(74) 2 described tail rooms support guide holder (73) are connected;Described tail room support base plate (76) lower surface is provided with tail room support
Upper roller guide plate (77), described tail room support fixed support (80) bottom is fixedly installed in altitude simulation cabin (1), described tail
Room support fixed support (80) upper surface is fixedly connected with described tail room support bottom roller guide plate (78) lower surface;Described tail room
Support roll wheel assembly (79) is arranged on described tail room support upper roller guide plate (77) and described tail room support bottom roller guide plate
(78), between, described tail room support roll wheel assembly (79) includes tail room support roller (81) and tail room Support frame (82), described
Tail room support roller (81) is arranged in tail room Support frame (82), described tail room bracket holder (71) being fixedly connected and tail
It is provided with tail room support reinforcement (83) between room scaffold bracket (72) and described tail room support base plate (76);
Described injector travel(l)ing rest (170) includes injector travel(l)ing rest upper bracket (171), injector travel(l)ing rest base plate
(172), injector travel(l)ing rest upper roller guide plate (173), injector travel(l)ing rest bottom roller guide plate (174), injector
Travel(l)ing rest roll wheel assembly (175), injector travel(l)ing rest lower carriage (177);Described injector travel(l)ing rest upper bracket (171)
It is fixedly connected with straight sections (140) such as blending, on described injector travel(l)ing rest base plate (172) upper surface and injector travel(l)ing rest
Support (171) is fixedly connected;Described injector travel(l)ing rest base plate (172) lower surface is provided with injector travel(l)ing rest upper roller
Guide plate (173), described injector travel(l)ing rest fixed support (177) upper surface and described injector travel(l)ing rest bottom roller are led
It is fixedly connected to plate (174) lower surface;Described injector travel(l)ing rest roll wheel assembly (175) is arranged on described injector activity
Between frame upper roller guide plate (173) and described injector travel(l)ing rest bottom roller guide plate (174), described injector activity
It is fixedly connected by turnbuckle (176) between frame base plate (172) and injector travel(l)ing rest lower carriage (177);Described injection
Device travel(l)ing rest roll wheel assembly (175) includes injector travel(l)ing rest roller (178) and injector travel(l)ing rest framework (179),
Described injector travel(l)ing rest roller (178) is arranged in injector travel(l)ing rest framework (179);Described injector travel(l)ing rest
It is provided with reinforcement (180) between upper bracket (171) and described injector travel(l)ing rest base plate (172);Described injector activity
Support fixed support (177) bottom is fixed with ground by foundation bolt.
5. exhaust apparatus according to claim 1 is it is characterised in that a diameter of D of described tail room converging portion (20) entrancew,
Convergency is αwr;The diameter D of the straight section such as described tail room (30)wkp, length is Lwkp;The diameter that described tail room expansion segment (40) exports
For Dwc, the angle of flare is αwc;Described Dw, Dwkp, LwkpMeet following equations group:
Lwkp=4Dwkp(7);
In above-mentioned equation group:Mw:Tail room converging portion entrance Mach number;k:Specific heat ratio;π(Mw):Tail room converging portion entrance Mach number pair
The static pressure answered and stagnation pressure ratio;Pw:The corresponding static pressure of tail room converging portion entrance Mach number, unit is pa;Pt5:Tail room converging portion enters
The mouth corresponding stagnation pressure of Mach number, unit is pa;Dw:The diameter of tail room converging portion entrance, unit is mm;d4kp:Engine venturi is straight
Footpath, unit is mm;After the corresponding normal shock wave of tail room converging portion entrance Mach number with normal shock wave before overall pressure tatio;q(Mw):Tail
The corresponding velocity coeffficient of room converging portion entrance Mach number;Dwkp:The diameter of the straight sections such as tail room, unit is mm;Lwkp:The straight sections such as tail room
Length, unit be mm;
Wherein, real environmental pressure when the corresponding static pressure of tail room converging portion entrance Mach number and supersonic speed engine high-altitude flight
Identical, the exit Mach number pair of the nozzle of the corresponding stagnation pressure of tail room converging portion entrance Mach number and supersonic speed engine
The stagnation pressure answered is identical, and the nozzle exit Mach number of supersonic speed engine is more than 1, the engines tail of supersonic speed engine
Nozzle exit Mach number, the corresponding stagnation pressure of nozzle exit Mach number of supersonic speed engine, supersonic speed engine is high
Real environmental pressure during empty flight, specific heat ratio and engine throat diameter are the intrinsic known parameters of supersonic speed engine,
Parameter in above-mentioned equation group:Mw, k, π (Mw), Pw, Pt5, Ww, d4kp,q(Mw), Dwkp, LwkpIt is in engine testsand
In the engine of all tests, the maximum corresponding parameter of engine of nozzle rate of discharge;
Described convergency meets:0 < αwr≤12°;The described angle of flare meets 0 < αwc≤12°.
6. exhaust apparatus according to claim 5 is it is characterised in that a diameter of D of described replaceable little tail room (50)wx,
Described DwxMeet following equations group:
In above-mentioned equation group:Mwx:Replaceable little tail chamber inlet Mach number;π(Mwx):Replaceable little tail chamber inlet Mach number is corresponding
Static pressure and stagnation pressure ratio;Pwx:The corresponding static pressure of replaceable little tail chamber inlet Mach number, unit is pa;Pt5x:Replaceable little tail room
The corresponding stagnation pressure of entrance Mach number, unit is pa;Dwx:Replaceable little tail chamber inlet diameter, unit is mm;d4kpx:Engine tries
In the engine of all tests in ride, the starting of engine in addition to the maximum engine of nozzle rate of discharge
Machine throat diameter, unit is mm;
Wherein, the corresponding static pressure of replaceable little tail chamber inlet Mach number and real environment pressure during supersonic speed engine high-altitude flight
Power is identical, the outlet Mach of the corresponding stagnation pressure of replaceable little tail chamber inlet Mach number and the nozzle of supersonic speed engine
The corresponding stagnation pressures of number are identical, and the nozzle exit Mach number of supersonic speed engine is more than 1, the starting of supersonic speed engine
Tail nozzle exit Mach number, the corresponding stagnation pressure of nozzle exit Mach number of supersonic speed engine, supersonic speed is started
Real environmental pressure during machine high-altitude flight, in the engine of all tests in specific heat ratio and engine testsand, except starting
The engine throat diameter of the engine beyond the engine of tail nozzle exit maximum flow is that supersonic speed engine is intrinsic
Known parameters, the parameter in above-mentioned equation group:Mwx, π (Mwx), Pwx, Pt5x, Dwx, d4kpx, it is all examinations in engine testsand
The corresponding parameter of supersonic speed engine in the engine tested, in addition to the maximum engine of nozzle rate of discharge.
7. exhaust apparatus according to claim 1 is it is characterised in that the throat diameter of injection air-flow is Dakp1, described injection
A diameter of D of air-flow expansion segment (115)a2, described Dakp1And Da2Meet following equations group:
Pam1=Ptb1(16)
In above-mentioned equation group:Dakp1:The throat diameter of injection air-flow, unit is mm;Sakp1:The area of the venturi of injection air-flow, single
Position is mm2;Ga1:The flow of injection air-flow, unit is kg/s;Tta1:The temperature of injection air-flow, unit is K;Ptakp1:Injection air-flow
Stagnation pressure in venturi, unit is Mpa;Ptam1:Injection air-flow in the corresponding stagnation pressure of injection air-flow expansion segment outlet Mach number,
Unit is Mpa;δ1:Injection air-flow is in the total pressure recovery coefficient of injection air-flow expansion segment;Pam1:Injection air-flow expands in injection air-flow
Open the corresponding static pressure of section outlet Mach number, unit is Mpa;Ma1:Injection air-flow is in injection air-flow expansion segment outlet horse
Conspicuous number;π(Ma1):Injection air-flow is in the corresponding static pressure of injection air-flow expansion segment outlet Mach number and overall pressure tatio;k:Specific heat ratio;
Ptb1:By injection air-flow stagnation pressure, unit is Mpa;Gb1:By the flow of injection air-flow, unit is kg/s;n1:Mass ratio of induced-to-inducing air;Da2:Draw
Emanate and flow the diameter of expansion segment, unit is mm;Sa2:The area of injection air-flow expansion segment, unit is mm2;q(Ma1):Injection air-flow
In the corresponding velocity coeffficient of injection air-flow expansion segment outlet Mach number;Wherein, injection air-flow goes out in injection air-flow expansion segment
Mouthful section Mach number is more than 1, described injection air-flow in injection air-flow expansion segment outlet Mach number by known by injection gas
Flow stagnation pressure and determined by the flow of injection air-flow, described mass ratio of induced-to-inducing air is by injection air-flow in injection air-flow expansion segment outlet horse
The stagnation temperature of conspicuous number and known injection air-flow and being determined by the stagnation temperature of injection air-flow, by the stagnation pressure of injection air-flow, flow, stagnation temperature with
The stagnation pressure that tail room expansion segment (40) exports, flow, stagnation temperature is identical.
8. exhaust apparatus according to claim 7 is it is characterised in that a diameter of D of the straight section such as described blending (140)ckp1,
Length is Lckp1;Blend a diameter of D of converging portion (130)c11, convergency is α1, length is Lc11;Described blending expansion segment (150)
A diameter of Da2, the angle of flare is α2, length is Lc12;Described Dckp1, Lckp1, Dc11, α11, Lc11, Dc12, α12, Lc12Meet following side
Journey group:
Sckp1=Sakp1×fackp1(22)
Lckp1=4 × Dckp1(23)
Sc11=1.95 × Sckp1(25)
Dc11=Dc12(26)
In above-mentioned equation group:Dckp1:The diameter of the straight sections such as blending, unit is mm;Sckp1:The area of straight section such as blend, unit is
mm2;fackp1:The area ratio of straight section and the venturi of injection air-flow such as blend;Lckp1:The length of the straight sections such as blending, unit is mm;
Dc11:Blend the diameter of converging portion, unit is mm;Sc11:Blend the area of converging portion, unit is mm2;Dc12:Blend expansion segment
Diameter, unit is mm;Lc11:Blend the length of converging portion, unit is mm;α11:Blend the convergency of converging portion, unit is ° Lc12:
Blend the length of expansion segment, unit is mm;α12:Blend expansion segment the angle of flare, unit be °;Wherein, straight section and the injection such as blending
The area of the straight sections such as airflow injection air-flow determines in injection air-flow expansion segment outlet Mach number than by injection air-flow.
9. exhaust apparatus according to claim 8 is it is characterised in that the convergency of described blending converging portion meets:4°≤
α11≤ 5 °, the described angle of flare blending expansion segment meets:4°≤α12≤5°.
10. exhaust apparatus according to claim 8 is it is characterised in that a diameter of D of described low pressure room housing (112)1, institute
The diameter stating low pressure room housing (112) meets equation:D1=1.05 × Dc11, wherein, D1Unit be mm;Described changeover portion
(120) length is S1, the length of described changeover portion (120) meets equation:S1=D1-Dc11, wherein, S1Unit be mm.
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CN109718679A (en) * | 2018-12-25 | 2019-05-07 | 中国航天空气动力技术研究院 | A kind of mixed stable voltage chamber device |
CN112098060A (en) * | 2020-08-19 | 2020-12-18 | 西北工业大学 | Method for measuring average Mach number of nozzle outlet |
CN112610331A (en) * | 2020-12-16 | 2021-04-06 | 中国人民解放军国防科技大学 | Negative pressure adjustable injection type compressor simulation test device |
CN113432879A (en) * | 2021-06-23 | 2021-09-24 | 中国航发沈阳发动机研究所 | Injection device |
CN113670627A (en) * | 2021-08-13 | 2021-11-19 | 上海坦泽环保集团有限公司 | Rocket engine ground test tail flame noise reduction injection cylinder |
CN113820138A (en) * | 2021-10-11 | 2021-12-21 | 上海坦泽环保集团有限公司 | Engine ground test environment control system |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN109718679A (en) * | 2018-12-25 | 2019-05-07 | 中国航天空气动力技术研究院 | A kind of mixed stable voltage chamber device |
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CN112610331A (en) * | 2020-12-16 | 2021-04-06 | 中国人民解放军国防科技大学 | Negative pressure adjustable injection type compressor simulation test device |
CN112610331B (en) * | 2020-12-16 | 2021-12-31 | 中国人民解放军国防科技大学 | Negative pressure adjustable injection type compressor simulation test device |
CN113432879A (en) * | 2021-06-23 | 2021-09-24 | 中国航发沈阳发动机研究所 | Injection device |
CN113670627A (en) * | 2021-08-13 | 2021-11-19 | 上海坦泽环保集团有限公司 | Rocket engine ground test tail flame noise reduction injection cylinder |
CN113670627B (en) * | 2021-08-13 | 2024-04-26 | 上海坦泽环保集团有限公司 | Noise-reducing ejector cylinder for ground test tail flame of rocket engine |
CN113820138A (en) * | 2021-10-11 | 2021-12-21 | 上海坦泽环保集团有限公司 | Engine ground test environment control system |
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