CN109141908A - A kind of application method of engine testsand - Google Patents
A kind of application method of engine testsand Download PDFInfo
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- CN109141908A CN109141908A CN201811164311.6A CN201811164311A CN109141908A CN 109141908 A CN109141908 A CN 109141908A CN 201811164311 A CN201811164311 A CN 201811164311A CN 109141908 A CN109141908 A CN 109141908A
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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
- G01M15/14—Testing gas-turbine engines or jet-propulsion engines
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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
- G01M15/02—Details or accessories of testing apparatus
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Abstract
A kind of application method of engine testsand, includes the following steps: S100), simulation storehouse pressure adjust；S200), engine charge stagnation pressure and oxygen content are adjusted；S300), engine charge total temperature is adjusted；S400), engine charge stagnation pressure is adjusted；S500), engine ignition；S600), the simulation test of N emulation mode point；S700), step S600 is repeated until after all emulation mode experimental tests, engine misses, close engine fuel supply flow rate regulating valve, oxygen supply flow control valve, after engine charge supply pressure regulating valve and alcohol supply flow rate regulating valve, injector active flow supply pressure regulating valve is closed.The application method of engine testsand of the invention, adjustment speed is fast, saves the regulating time of the simulation of test bay engine charge and the simulation of flying height environmental pressure, reduces experimentation cost, avoid energy waste.
Description
Technical field
The present invention relates to test measurement technical field, especially a kind of application method of engine testsand.
Background technique
Aero-engine need to do altitude simulation test on ground before being taken a flight test, when engine test, it is desirable that one group of ginseng
Number, including inlet total pressure, Induction air flow, air inlet oxygen content, inlet total temperature, engine oil oil mass, air environment pressure,
Referred to as state point, at the same reach setting value and stablize after, record its performance and parameter or examine its performance, available engine examination
Ride technology, for engine charge simulation, flight environment of vehicle pressure simulation there is no mature technology, simultaneously for emulation mode when
Reach stable state also without accurate theoretical determination method, causes test simulation effect poor, the test period is long, at high cost, resource
It is serious to waste situation.
Summary of the invention
Technology of the invention solves the problems, such as: overcoming the deficiencies of the prior art and provide a kind of use of engine testsand
Method.
The technical solution of the invention is as follows: a kind of application method of engine testsand, the engine testsand packet
Include supply source, temperature simulation unit, boiler-plate and exhaust injector；Supply source includes fuel delivery source, and oxygen supply source starts
Machine air inlet supply source, alcohol supply source and injector active flow supply source；Temperature simulation unit includes tube body and shell, tube body
It is first medium channel in enclosure interior, tube body, the space between the outer wall of tube body and the inner wall of shell forms second and is situated between
Matter channel；It is located in boiler-plate by spreadsheet engine；Fuel delivery source is connected to by pipeline with by spreadsheet engine, oxygen supply source and
Engine charge supply source passes through pipeline respectively and is connected to the entrance in second medium channel, and the outlet in second medium channel passes through pipe
Road is connected to by the air inlet of spreadsheet engine, and alcohol supply source passes through the entrance of pipeline and first medium channel after igniter
Connection, the outlet in first medium channel are in communication with the outside, and injector active flow supply source is connected by pipeline and exhaust injector
Logical, exhaust injector passes through boiler-plate close to by the exhaust pipe of spreadsheet engine；It is connected to fuel delivery source and the pipe by spreadsheet engine
Road is provided with engine fuel supply flow rate regulating valve, is connected on the pipeline of the entrance in oxygen supply source and second medium channel
It is provided with oxygen supply flow control valve, is connected on engine charge supply source and the pipeline of the entrance in second medium channel and is provided with
Alcohol is provided on the pipeline of the entrance in engine charge supply pressure regulating valve, connection alcohol supply source and first medium channel
Supply flow rate regulating valve is connected on the pipeline of injector active flow supply source and exhaust injector and is provided with injector active gas
Flow supply pressure regulating valve；
The application method of the engine testsand, includes the following steps:
S100), simulation storehouse pressure is adjusted
Injector active flow supply pressure is adjusted according to the environmental pressure of the engine flight height of the first emulation mode point
Force regulating valve keeps the pressure in boiler-plate identical as the environmental pressure of engine flight height of the first emulation mode point；
S200), engine charge stagnation pressure and oxygen content are adjusted
Engine charge supply pressure regulating valve and oxygen are adjusted according to the inlet total pressure of the first emulation mode point and oxygen content
Supply flow rate regulating valve makes the stagnation pressure and oxygen content and the first emulation mode point of the second medium by second medium channel outlet
The inlet total pressure of engine is identical with oxygen content；
S300), engine charge total temperature is adjusted
Alcohol supply flow rate regulating valve and initial igniter are adjusted according to the inlet total temperature of the first emulation mode point, lights wine
Essence makes alcohol burn, and the alcohol of burning exchanges heat in the second medium in first medium channel and second medium channel, makes by second
The total temperature of the second medium of medium channel outlet is identical as the inlet total temperature of the first emulation mode point engine；
S400), engine charge stagnation pressure is adjusted
Engine charge supply pressure regulating valve is adjusted according to the inlet total pressure of the first emulation mode point, makes to be situated between by second
The stagnation pressure of the second medium of matter channel outlet is identical as the inlet total pressure of the first emulation mode point engine；
S500), engine ignition
Engine fuel supply flow rate regulating valve is adjusted according to the fuel demand amount of engine the first emulation mode point, makes to fire
The fuel oil of oily supply source supply is identical as the fuel demand amount of engine the first emulation mode point, and engine ignition carries out first
The simulation test of emulation mode point to the state point simulation test terminates；
S600), the simulation test of N emulation mode point
Injector active flow supply pressure regulating valve is adjusted respectively, adjusts oxygen supply flow control valve, engine charge
Supply pressure regulating valve, alcohol supply flow rate regulating valve and engine fuel supply flow rate regulating valve, make the pressure in boiler-plate
It is identical as the environmental pressure of engine flight height of N emulation mode point, the second medium of second medium channel outlet it is total
Pressure, total temperature and oxygen content are identical as the inlet total pressure of N emulation mode point engine, total temperature and oxygen content, and fuel delivery source supplies
The fuel oil given is identical as the fuel demand of N emulation mode point engine；Wherein, N >=2 start the simulation of engine nth state point
Test to the state point simulation test terminates；
S700), step S600 is repeated until after all emulation mode experimental tests, engine misses close engine
Fuel delivery flow control valve, oxygen supply flow control valve, engine charge supply pressure regulating valve and alcohol supply flow rate tune
After saving valve, injector active flow supply pressure regulating valve is closed.
Further, the engine testsand includes engine fuel supply shut-off valve, oxygen supply shut-off valve and alcohol
Shut-off valve is supplied, in the use process of engine testsand, opens engine before opening engine fuel supply flow rate regulating valve
Fuel delivery shut-off valve opens oxygen supply shut-off valve before opening oxygen supply flow control valve, opens alcohol supply flow rate regulating valve
Preceding unlatching alcohol supplies shut-off valve；Engine fuel supply shut-off valve is closed after closing engine fuel supply flow rate regulating valve,
Oxygen supply shut-off valve is closed after closing oxygen supply flow control valve, closing alcohol supply is cut after closing alcohol supply flow rate regulating valve
Only valve.
Further, in step S300, alcohol supply flow rate is adjusted according to the inlet total temperature of the first emulation mode point and is adjusted
Valve and initial igniter, lighting alcohol makes alcohol burn, the alcohol of burning in first medium channel and second medium channel the
Second medium heat exchange, makes the air inlet of the total temperature and the first emulation mode point engine of the second medium by second medium channel outlet
Total temperature is identical；Include the following steps:
S310), alcohol supply flow rate regulating valve, starting are adjusted according to the highest operating condition value that temperature simulation unit can bear
Igniter, lighting alcohol makes alcohol burn, and the alcohol of burning changes in first medium channel and the second medium in second medium channel
Heat；
S320), state to the temperature simulation unit of step S310 is kept to enter steady-working state；
S330), according in the first emulation mode point, the second medium total temperature of second medium channel outlet, second medium leads to
The quality of second medium in road, the specific heat at constant pressure of second medium, inboard wall of tube body convection transfer rate, the inner wall of entire tube body
It is long-pending, the quality of first medium in first medium channel, the specific heat at constant pressure of first medium, tube wall convection transfer rate, entirely
The outer wall area of tube body and the second medium total temperature of second medium feeder connection, determine the supplying temperature of first medium；
S340), alcohol supply flow rate regulating valve is adjusted, by the first medium state in first medium channel by with temperature mould
The highest operating condition value supply that quasi-simple member can bear is adjusted to the predetermined value supply according to the first simulation test state point；
S350), keep the first medium in first medium channel according to the predetermined value of the first simulation test state point of experiment
Supply state to temperature simulation unit enters steady-working state, at this point, the second medium by second medium channel outlet
Total temperature is identical as the inlet total temperature of the first emulation mode point engine.
Further, in step S600, injector active flow supply pressure regulating valve is adjusted respectively, adjusts oxygen supply stream
Adjustable valve, engine charge supply pressure regulating valve, alcohol supply flow rate regulating valve and engine fuel supply flow rate are adjusted
Valve keeps the pressure in boiler-plate identical as the environmental pressure of engine flight height of N emulation mode point, second medium channel
Stagnation pressure, total temperature and the oxygen content of the second medium of outlet and inlet total pressure, total temperature and the oxygen content of N emulation mode point engine
Identical, the fuel oil of fuel delivery source supply is identical as the fuel demand of N emulation mode point engine；Wherein, N >=2；Including such as
Lower step:
S610), injector active flow is adjusted according to the environmental pressure of the engine flight height of N emulation mode point to supply
To pressure-regulating valve, keep the pressure in boiler-plate identical as the environmental pressure of engine flight height of N emulation mode point；
S620), oxygen supply flow control valve is adjusted, the oxygen content and N of the second medium of second medium channel outlet are made
The oxygen content of emulation mode point engine is identical；
S630), according in N emulation mode point, the second medium total temperature of second medium channel outlet, second medium channel
The quality of interior second medium, the specific heat at constant pressure of second medium, inboard wall of tube body convection transfer rate, the inner wall area of entire tube body,
The quality of first medium in first medium channel, the specific heat at constant pressure of first medium, tube wall convection transfer rate, entire tube body
Outer wall area and second medium feeder connection second medium total temperature, determine the supplying temperature of first medium；
S640), alcohol supply flow rate regulating valve is adjusted, by the first medium state in first medium channel by the first simulation
The predetermined value supply of trystate point is adjusted to the predetermined value supply according to N simulation test state point；
S650), the first medium in first medium channel is kept to supply according to the predetermined value of experiment N simulation test state point
Enter steady-working state to state to temperature simulation unit, at this point, the second medium by second medium channel outlet is total
The inlet total temperature of Wen Yu N emulation mode point engine is identical；
S660), according to the inlet total pressure of N emulation mode point adjust engine charge supply pressure regulating valve, make by
The stagnation pressure of the second medium of second medium channel outlet is identical as the inlet total pressure of N emulation mode point engine；
S670), engine fuel supply flow rate is adjusted according to the fuel demand amount of engine N emulation mode point to adjust
Valve, the fuel oil for supplying fuel delivery source are identical as the fuel demand amount of engine N emulation mode point.
Further, the highest operating condition value that temperature simulation unit can bear is first that temperature simulation unit can bear
Maximum pressure, maximum temperature and the maximum flow of medium；The parameter of the predetermined value of simulation test state point include medium inlet and
The pressure of outlet, the flow of medium and the temperature of medium.
Further, in step S320, state to the temperature simulation unit of step S310 is kept to enter steady-working state,
The required time is T1；Keep the first medium in first medium channel according to the first simulation test state of experiment in step S350
Predetermined value supply state to the temperature simulation unit of point enters steady-working state, and the required time is T2；It is protected in step S650
First medium in first medium channel is held according to the predetermined value supply state of experiment N simulation test state point to temperature simulation
Unit enters steady-working state, and the required time is TN；
T1, T2And TNEnter steady-working state calculation formula according to temperature simulation unit to determine；Temperature simulation unit into
Enter steady-working state calculation formula are as follows:
In formula: TxEnter the time of steady-working state, unit s for temperature simulation unit；M is the matter of entire tube body
Amount, unit kg are known quantity；cmpFor the specific heat at constant pressure of tube body, unit J/kgK is known quantity；hhFor inboard wall of tube body pair
The coefficient of heat transfer is flowed, unit is W/ (m2It K), is known quantity；AsiFor the inner wall area of entire tube body, unit m2, it is known quantity；
mhFor the quality of the first medium in first medium channel, unit kg is known quantity；cphFor the level pressure ratio of first medium
Heat, unit J/kgK are known quantity；hcFor tube wall convection transfer rate, unit is W/ (m2It K), is known quantity；
AseFor the outer wall area of entire tube body, unit m2, it is known quantity；mcFor the matter of the second medium in second medium channel
Amount, unit kg are known quantity；cpcFor the specific heat at constant pressure of second medium, unit J/kgK is known quantity.
Further, in step S330, according in the first emulation mode point, the second medium of second medium channel outlet is total
Temperature, the quality of second medium in second medium channel, the specific heat at constant pressure of second medium, inboard wall of tube body convection transfer rate, entirely
The inner wall area of tube body, the quality of first medium, the specific heat at constant pressure of first medium, tube wall convection current are changed in first medium channel
Hot coefficient, the outer wall area of entire tube body and the second medium total temperature of second medium feeder connection, determine the supply of first medium
Temperature, at this point, the supplying temperature of first medium is Thi1；
In step S630, according in N emulation mode point, the second medium total temperature of second medium channel outlet, second is situated between
The quality of second medium in matter channel, the specific heat at constant pressure of second medium, inboard wall of tube body convection transfer rate, the inner wall of entire tube body
Area, the quality of first medium, the specific heat at constant pressure of first medium, tube wall convection transfer rate are whole in first medium channel
The outer wall area of a tube body and the second medium total temperature of second medium feeder connection, determine the supplying temperature of first medium, at this point,
The supplying temperature of first medium is ThiN；
Thi1And ThiNDetermined according to temperature simulation unit hot-fluid input temp formula；Temperature simulation unit hot-fluid input temperature
Spend formula are as follows:
In formula:
ThixFor the supplying temperature of first medium, unit K；TcoIt is single for the second medium total temperature of second medium channel outlet
Position is K, is known quantity；mcFor the quality of second medium in second medium channel, unit kg is known quantity；cpcFor second medium
Specific heat at constant pressure, unit J/kgK, be known quantity；hhFor inboard wall of tube body convection transfer rate, unit is W/ (m2K), it is
Known quantity；AsiFor the inner wall area of entire tube body, unit m2, it is known quantity；mhFor first medium in first medium channel
Quality, unit kg are known quantity；cphFor the specific heat at constant pressure of first medium, unit J/kgK is known quantity；hcFor tube body
Outer wall convection transfer rate, unit are W/ (m2It K), is known quantity；AseFor the outer wall area of entire tube body, unit m2, it is
Known quantity；TciFor the second medium total temperature of second medium feeder connection, unit K is known quantity.
The advantages of the present invention over the prior art are that:
1, the application method of engine testsand of the invention, using the pressure for first adjusting boiler-plate, then to adjust air inlet total
Pressure and oxygen content, then adjust inlet total temperature, and after last accurate adjustment inlet total pressure, the mode of fuel feeding igniting, adjustment speed is fast, saves
The regulating time of the simulation of test bay engine charge and the simulation of flying height environmental pressure, reduces experimentation cost, avoids
Energy waste.
2, the application method of engine testsand of the invention, will be by spreadsheet engine as in boiler-plate, and boiler-plate uses
Sealing state is evacuated by exhaust injector, and simulated engine is in the environmental pressure of different flying heights, passes through injector master
It takes offence and flows supply source and provide injection air-flow for exhaust injector, method is simple；The confession to engine is realized by fuel delivery source
Oil.
3, the application method of engine testsand of the invention passes through engine charge supply source simulated engine inlet air flow
Amount, inlet total pressure, meanwhile, it is engine charge progress oxygenating by oxygen supply source and is started by temperature simulation unit simulation
The intake air temperature of machine, realizes the real simulation of engine charge, and simulation precision is high.
4, the application method of engine testsand of the invention is arranged alcohol supply source, is lighted alcohol by igniter
It generates heat to exchange heat in temperature simulation unit with engine charge, realizes the adjusting of Engine Inlet Temperature.
5, the application method of engine testsand of the invention realizes the stream in joint supply source by the way that various valves are arranged
Amount and pressure adjustable, and then realize the simulation of multimode point.
6, the application method of engine testsand of the invention, it is creative in the use process of temperature simulation unit
On startup, thermal current first is inputted to heat exchanger using the highest operating condition value that temperature simulation unit can bear, makes temperature simulation
The inner tube of unit is operated at full capacity, and is warmed up with most fast speed, and tube body temperature promotion speed is fast, uniformity of temperature profile, then by
Full load condition is adjusted to test predetermined value, substantially shortens into the steady-working state time.
7, the application method of engine testsand of the invention, in the use process of temperature simulation unit, by a large amount of
Test data and creativeness to curve-fitting data, it is determined that the temperature simulation unit of high accuracy enters steady operation
State computation formula, can accurate temperature analogue unit enter time of steady-working state, substantially shorten test period,
Experimentation cost is reduced, energy waste is avoided.
8, the application method of engine testsand of the invention, in the use process of temperature simulation unit, by a large amount of
Test data and creativeness to curve-fitting data, it is determined that the temperature simulation unit hot-fluid of high accuracy, which inputs, to be calculated
Formula, the temperature simulation unit hot-fluid input temp that can accurately determine, substantially shortens test period, reduces experimentation cost,
Avoid energy waste.
Detailed description of the invention
Fig. 1 is the application method flow chart of engine testsand of the invention.
Fig. 2 is the schematic illustration for the engine testsand that the application method of engine testsand of the invention is related to.
Fig. 3 is the temperature simulation unit in the engine testsand that the application method of engine testsand of the invention is related to
Partial structural diagram.
Specific embodiment
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.In addition, limit
There is the feature of " first ", " second " to can explicitly or implicitly include one or more of the features surely.Of the invention
In description, unless otherwise indicated, the meaning of " plurality " is two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection ", " abutting " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
The concrete meaning of language in the present invention.
A kind of application method of engine testsand is used for engine high-altitude multimode point simulation test, the state
The parameter of point includes engine charge stagnation pressure, Induction air flow, air inlet oxygen ingredient, inlet total temperature, engine oil oil mass, empty
Gas environmental pressure；The engine testsand includes supply source, temperature simulation unit 200, boiler-plate 300 and exhaust injector
600；Supply source includes fuel delivery source 110, oxygen supply source 120, engine charge supply source 130,140 He of alcohol supply source
Injector active flow supply source 150；The temperature simulation unit includes tube body 210 and shell 220, and the tube body 210 is located at
It is first medium channel, the outer wall of the tube body 210 and the shell 220 in the tube body 210 inside the shell 220
Space between inner wall forms second medium channel；When the temperature simulation unit 200 works, first medium is logical in first medium
Circulate in road, second medium circulates in second medium channel, and first medium temperature is higher than second medium, the first medium and
Second medium realizes heat exchange by the tube wall of the tube body 210；It is located in the boiler-plate 300 by spreadsheet engine 400；The combustion
Oily supply source 110 is connected to described by spreadsheet engine 400 by pipeline, the oxygen supply source 120 and the engine charge
Supply source 130 is connected to by pipeline with the entrance in second medium channel respectively, and the outlet in second medium channel passes through pipeline and institute
It states by the air inlet connection of spreadsheet engine 400, to provide the engine intake airflow of simulation, inlet total pressure by spreadsheet engine 400
And oxygen content；The alcohol supply source 140 is connected to by pipeline with the entrance in first medium channel after igniter, and first
The outlet of medium channel is in communication with the outside, and alcohol is lighted burning and generates heat in the temperature simulation unit 200 by igniter
It exchanges heat with the second medium in second medium channel to adjust the temperature of the second medium in second medium channel, to realize hair
The simulation of motivation intake air temperature, engine charge simulation of the invention is true, and precision is high, and structure is simple.
The injector active flow supply source 150 is connected to by pipeline with the exhaust injector 600, and the exhaust is drawn
Emitter 600 passes through the boiler-plate 300 close to the exhaust pipe by spreadsheet engine 400；It is preferred that the exhaust injector 600
Entrance section with it is described by a distance from 400 exhaust outlet section of spreadsheet engine for by 400 exhaust outlet of spreadsheet engine cut
The half of radius surface sets performance to improve drawing for injector；The exhaust injector 600 draws the gas set in the boiler-plate 300
And the exhaust by spreadsheet engine 4000, the environmental pressure of different flying heights, the injection are in simulated engine
Device active flow supply source 150 is that the exhaust injector 600 provides injection air-flow；The structure of exhaust injector 600 is existing
Technology, referring specifically to applicant identified patent applications CN201610786167.4, CN201610786117.6,
CN201610790335.7, CN201610764543.X, CN201610764549.7 etc..Be connected to the fuel delivery source 110 with
It is described that engine fuel supply flow rate regulating valve 510 is provided on the pipeline of spreadsheet engine 400, it is connected to the oxygen supply source
120 be provided with oxygen supply flow control valve 530 on the pipeline of the entrance in the second medium channel, be connected to the engine into
It is provided with engine charge supply pressure regulating valve 550 on the pipeline of gas supply source 130 and the entrance in second medium channel, is connected to
It is provided with alcohol supply flow rate regulating valve 560 on the alcohol supply source 140 and the pipeline of the entrance in first medium channel, is connected to
The confession of injector active flow is provided on the injector active flow supply source 150 and the pipeline of the exhaust injector 600
Meet the simulation of multimode point to pressure-regulating valve 580 to realize the parameter regulation of each supply source.
The application method of the engine testsand, includes the following steps:
S100), simulation storehouse pressure is adjusted
Injector active flow supply pressure is adjusted according to the environmental pressure of the engine flight height of the first emulation mode point
Force regulating valve keeps the pressure in boiler-plate identical as the environmental pressure of engine flight height of the first emulation mode point.
S200), engine charge stagnation pressure and oxygen content are adjusted
Engine charge supply pressure regulating valve and oxygen are adjusted according to the inlet total pressure of the first emulation mode point and oxygen content
Supply flow rate regulating valve makes the stagnation pressure and oxygen content and the first emulation mode point of the second medium by second medium channel outlet
The inlet total pressure of engine is identical with oxygen content.
S300), engine charge total temperature is adjusted
Alcohol supply flow rate regulating valve and initial igniter are adjusted according to the inlet total temperature of the first emulation mode point, lights wine
Essence makes alcohol burn, and the alcohol of burning exchanges heat in the second medium in first medium channel and second medium channel, makes by second
The total temperature of the second medium of medium channel outlet is identical as the inlet total temperature of the first emulation mode point engine；
S310), alcohol supply flow rate regulating valve, starting are adjusted according to the highest operating condition value that temperature simulation unit can bear
Igniter, lighting alcohol makes alcohol burn, and the alcohol of burning changes in first medium channel and the second medium in second medium channel
Heat；
S320), state to the temperature simulation unit of step S310 is kept to enter steady-working state；
S330), according in the first emulation mode point, the second medium total temperature of second medium channel outlet, second medium leads to
The quality of second medium in road, the specific heat at constant pressure of second medium, inboard wall of tube body convection transfer rate, the inner wall of entire tube body
It is long-pending, the quality of first medium in first medium channel, the specific heat at constant pressure of first medium, tube wall convection transfer rate, entirely
The outer wall area of tube body and the second medium total temperature of second medium feeder connection, determine the supplying temperature of first medium；
S340), alcohol supply flow rate regulating valve is adjusted, by the first medium state in first medium channel by with temperature mould
The highest operating condition value supply that quasi-simple member can bear is adjusted to the predetermined value supply according to the first simulation test state point；
S350), keep the first medium in first medium channel according to the predetermined value of the first simulation test state point of experiment
Supply state to temperature simulation unit enters steady-working state, at this point, the second medium by second medium channel outlet
Total temperature is identical as the inlet total temperature of the first emulation mode point engine.
S400), engine charge stagnation pressure is adjusted
Engine charge supply pressure regulating valve is adjusted according to the inlet total pressure of the first emulation mode point, makes to be situated between by second
The stagnation pressure of the second medium of matter channel outlet is identical as the inlet total pressure of the first emulation mode point engine.
S500), engine ignition
Engine fuel supply flow rate regulating valve is adjusted according to the fuel demand amount of engine the first emulation mode point, makes to fire
The fuel oil of oily supply source supply is identical as the fuel demand amount of engine the first emulation mode point, and engine ignition carries out first
The simulation test of emulation mode point to the state point simulation test terminates.
S600), the simulation test of N emulation mode point
Injector active flow supply pressure regulating valve is adjusted respectively, adjusts oxygen supply flow control valve, engine charge
Supply pressure regulating valve, alcohol supply flow rate regulating valve and engine fuel supply flow rate regulating valve, make the pressure in boiler-plate
It is identical as the environmental pressure of engine flight height of N emulation mode point, the second medium of second medium channel outlet it is total
Pressure, total temperature and oxygen content are identical as the inlet total pressure of N emulation mode point engine, total temperature and oxygen content, and fuel delivery source supplies
The fuel oil given is identical as the fuel demand of N emulation mode point engine；Wherein, N >=2 start the simulation of engine nth state point
Test to the state point simulation test terminates.
S610), injector active flow is adjusted according to the environmental pressure of the engine flight height of N emulation mode point to supply
To pressure-regulating valve, keep the pressure in boiler-plate identical as the environmental pressure of engine flight height of N emulation mode point；
S620), oxygen supply flow control valve is adjusted, the oxygen content and N of the second medium of second medium channel outlet are made
The oxygen content of emulation mode point engine is identical；
S630), according in N emulation mode point, the second medium total temperature of second medium channel outlet, second medium channel
The quality of interior second medium, the specific heat at constant pressure of second medium, inboard wall of tube body convection transfer rate, the inner wall area of entire tube body,
The quality of first medium in first medium channel, the specific heat at constant pressure of first medium, tube wall convection transfer rate, entire tube body
Outer wall area and second medium feeder connection second medium total temperature, determine the supplying temperature of first medium；
S640), alcohol supply flow rate regulating valve is adjusted, by the first medium state in first medium channel by the first simulation
The predetermined value supply of trystate point is adjusted to the predetermined value supply according to N simulation test state point；
S650), the first medium in first medium channel is kept to supply according to the predetermined value of experiment N simulation test state point
Enter steady-working state to state to temperature simulation unit, at this point, the second medium by second medium channel outlet is total
The inlet total temperature of Wen Yu N emulation mode point engine is identical；
S660), according to the inlet total pressure of N emulation mode point adjust engine charge supply pressure regulating valve, make by
The stagnation pressure of the second medium of second medium channel outlet is identical as the inlet total pressure of N emulation mode point engine；
S670), engine fuel supply flow rate is adjusted according to the fuel demand amount of engine N emulation mode point to adjust
Valve, the fuel oil for supplying fuel delivery source is identical as the fuel demand amount of engine N emulation mode point, starts engine N
State point simulation test to the state point simulation test terminates.
S700), step S600 is repeated until after all emulation mode experimental tests, engine misses close engine
Fuel delivery flow control valve, oxygen supply flow control valve, engine charge supply pressure regulating valve and alcohol supply flow rate tune
After saving valve, injector active flow supply pressure regulating valve is closed.
Preferably, the highest operating condition value that temperature simulation unit can bear is first Jie that temperature simulation unit can bear
Maximum pressure, maximum temperature and the maximum flow of matter；The parameter of the predetermined value of simulation test state point includes medium inlet and goes out
The pressure of mouth, the flow of medium and the temperature of medium.
Preferably, the engine testsand includes engine fuel supply shut-off valve 520,540 He of oxygen supply shut-off valve
Alcohol supplies shut-off valve 570, and engine fuel supply shut-off valve 520 setting is being connected to the fuel delivery source 110 and institute
It states by the pipeline of spreadsheet engine 400；The oxygen supply shut-off valve 540 setting be connected to the oxygen supply source 120 with it is described
On the pipeline of the entrance in second medium channel；Alcohol supply shut-off valve 570 setting be connected to the alcohol supply source 140 with
On the pipeline of the entrance in first medium channel.In the use process of engine testsand, the engine fuel supply stream is opened
The engine fuel supply shut-off valve 520 is opened before adjustable valve 510, is opened before opening the oxygen supply flow control valve 530
Oxygen supply shut-off valve 540 is opened, opens the alcohol supply shut-off valve 570 before opening the alcohol supply flow rate regulating valve 560；It closes
The engine fuel supply shut-off valve 520 is closed after closing the engine fuel supply flow rate regulating valve 510, closes the oxygen
Oxygen supply shut-off valve 540 is closed after supply flow rate regulating valve 530, closes institute after closing the alcohol supply flow rate regulating valve 560
Alcohol supply shut-off valve 570 is stated, to guarantee safety of the test bay under non-experimental state.
Preferably, in step S320, state to the temperature simulation unit of step S310 is kept to enter steady-working state, institute
The time needed is T1；Keep the first medium in first medium channel according to the first simulation test state point of experiment in step S350
Predetermined value supply state to temperature simulation unit enter steady-working state, the required time is T2；It is kept in step S650
First medium in first medium channel is according to the predetermined value supply state of experiment N simulation test state point to temperature simulation list
Member enters steady-working state, and the required time is TN；
T1, T2And TNEnter steady-working state calculation formula according to temperature simulation unit to determine；Temperature simulation unit into
Enter steady-working state calculation formula are as follows:
In formula: TxEnter the time of steady-working state, unit s for temperature simulation unit；M is the matter of entire tube body
Amount, unit kg are known quantity；cmpFor the specific heat at constant pressure of tube body, unit J/kgK is known quantity；hhFor inboard wall of tube body pair
The coefficient of heat transfer is flowed, unit is W/ (m2It K), is known quantity；AsiFor the inner wall area of entire tube body, unit m2, it is known quantity；
mhFor the quality of the first medium in first medium channel, unit kg is known quantity；cphFor the level pressure ratio of first medium
Heat, unit J/kgK are known quantity；hcFor tube wall convection transfer rate, unit is W/ (m2It K), is known quantity；
AseFor the outer wall area of entire tube body, unit m2, it is known quantity；mcFor the matter of the second medium in second medium channel
Amount, unit kg are known quantity；cpcFor the specific heat at constant pressure of second medium, unit J/kgK is known quantity.
Preferably, step S330 is according in the first emulation mode point, the second medium total temperature of second medium channel outlet, and
The quality of second medium in second medium channel, the specific heat at constant pressure of second medium, inboard wall of tube body convection transfer rate, entire tube body
Inner wall area, the quality of first medium, the specific heat at constant pressure of first medium, tube wall heat convection system in first medium channel
Number, the outer wall area of entire tube body and the second medium total temperature of second medium feeder connection, determine the supplying temperature of first medium,
At this point, the supplying temperature of first medium is Thi1；
In step S630, according in N emulation mode point, the second medium total temperature of second medium channel outlet, second is situated between
The quality of second medium in matter channel, the specific heat at constant pressure of second medium, inboard wall of tube body convection transfer rate, the inner wall of entire tube body
Area, the quality of first medium, the specific heat at constant pressure of first medium, tube wall convection transfer rate are whole in first medium channel
The outer wall area of a tube body and the second medium total temperature of second medium feeder connection, determine the supplying temperature of first medium, at this point,
The supplying temperature of first medium is ThiN；
Thi1And ThiNDetermined according to temperature simulation unit hot-fluid input temp formula；Temperature simulation unit hot-fluid input temperature
Spend formula are as follows:
In formula:
ThixFor the supplying temperature of first medium, unit K；TcoIt is single for the second medium total temperature of second medium channel outlet
Position is K, is known quantity；mcFor the quality of second medium in second medium channel, unit kg is known quantity；cpcFor second medium
Specific heat at constant pressure, unit J/kgK, be known quantity；hhFor inboard wall of tube body convection transfer rate, unit is W/ (m2K), it is
Known quantity；AsiFor the inner wall area of entire tube body, unit m2, it is known quantity；mhFor first medium in first medium channel
Quality, unit kg are known quantity；cphFor the specific heat at constant pressure of first medium, unit J/kgK is known quantity；hcFor tube body
Outer wall convection transfer rate, unit are W/ (m2It K), is known quantity；AseFor the outer wall area of entire tube body, unit m2, it is
Known quantity；TciFor the second medium total temperature of second medium feeder connection, unit K is known quantity.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ",
The description of " example ", " specific example " or " some examples " etc. means specific features described in conjunction with this embodiment or example, knot
Structure, material or feature are included at least one embodiment or example of the invention.In the present specification, to above-mentioned term
Schematic representation may not refer to the same embodiment or example.Moreover, specific features, structure, material or the spy of description
Point can be combined in any suitable manner in any one or more of the embodiments or examples.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not
A variety of change, modification, replacement and modification can be carried out to these embodiments in the case where being detached from the principle of the present invention and objective, this
The range of invention is defined by the claims and their equivalents.
Claims (7)
1. a kind of application method of engine testsand, which is characterized in that the engine testsand includes supply source, temperature mould
Quasi-simple member, boiler-plate and exhaust injector；
Supply source includes fuel delivery source, oxygen supply source, engine charge supply source, alcohol supply source and injector active gas
Flow supply source；
Temperature simulation unit includes tube body and shell, and tube body is located at enclosure interior, is first medium channel in tube body, tube body it is outer
Space between wall and the inner wall of shell forms second medium channel；
It is located in boiler-plate by spreadsheet engine；
Fuel delivery source is connected to by pipeline with by spreadsheet engine, and oxygen supply source and engine charge supply source pass through pipe respectively
Road is connected to the entrance in second medium channel, and the outlet in second medium channel is connected by pipeline with by the air inlet of spreadsheet engine
Logical, alcohol supply source is connected to by pipeline with the entrance in first medium channel after igniter, the supply of injector active flow
Source is connected to by pipeline with exhaust injector, and exhaust injector passes through boiler-plate close to by the exhaust pipe of spreadsheet engine；
It is connected to fuel delivery source and is provided with engine fuel supply flow rate regulating valve on the pipeline of spreadsheet engine, be connected to oxygen
It is provided with oxygen supply flow control valve on the pipeline of supply source and the entrance in second medium channel, is connected to engine charge supply source
Be provided with engine charge supply pressure regulating valve on the pipeline of the entrance in second medium channel, be connected to alcohol supply source and the
Alcohol supply flow rate regulating valve is provided on the pipeline of the entrance of one medium channel, the outlet in first medium channel and the external world are even
It is logical, it is connected on the pipeline of injector active flow supply source and exhaust injector and is provided with injector active flow supply pressure tune
Save valve；
The application method of the engine testsand, includes the following steps:
S100), simulation storehouse pressure is adjusted
Injector active flow supply pressure tune is adjusted according to the environmental pressure of the engine flight height of the first emulation mode point
Valve is saved, keeps the pressure in boiler-plate identical as the environmental pressure of engine flight height of the first emulation mode point；
S200), engine charge stagnation pressure and oxygen content are adjusted
Engine charge supply pressure regulating valve and oxygen supply are adjusted according to the inlet total pressure of the first emulation mode point and oxygen content
Flow control valve starts the stagnation pressure of the second medium by second medium channel outlet and oxygen content with the first emulation mode point
The inlet total pressure of machine is identical with oxygen content；
S300), engine charge total temperature is adjusted
Alcohol supply flow rate regulating valve and initial igniter are adjusted according to the inlet total temperature of the first emulation mode point, lighting alcohol makes
The alcohol of alcohol burn, burning exchanges heat in the second medium in first medium channel and second medium channel, makes by second medium
The total temperature of the second medium of channel outlet is identical as the inlet total temperature of the first emulation mode point engine；
S400), engine charge stagnation pressure is adjusted
Engine charge supply pressure regulating valve is adjusted according to the inlet total pressure of the first emulation mode point, is made logical by second medium
The stagnation pressure of the second medium of road outlet is identical as the inlet total pressure of the first emulation mode point engine；
S500), engine ignition
Engine fuel supply flow rate regulating valve is adjusted according to the fuel demand amount of engine the first emulation mode point, supplies fuel oil
The fuel oil supplied to source is identical as the fuel demand amount of engine the first emulation mode point, engine ignition, carries out the first simulation
The simulation test of state point to the state point simulation test terminates；
S600), the simulation test of N emulation mode point
Injector active flow supply pressure regulating valve is adjusted respectively, adjusts oxygen supply flow control valve, engine charge supply
Pressure-regulating valve, alcohol supply flow rate regulating valve and engine fuel supply flow rate regulating valve make pressure and N in boiler-plate
The environmental pressure of the engine flight height of emulation mode point is identical, the stagnation pressure of the second medium of second medium channel outlet, total
Mild oxygen content is identical as the inlet total pressure of N emulation mode point engine, total temperature and oxygen content, the combustion of fuel delivery source supply
Oil is identical as the fuel demand of N emulation mode point engine；Wherein, N >=2；Start engine nth state point simulation test extremely
The state point simulation test terminates；
S700), step S600 is repeated until after all emulation mode experimental tests, engine misses close engine fuel
Supply flow rate regulating valve, oxygen supply flow control valve, engine charge supply pressure regulating valve and alcohol supply flow rate regulating valve
Afterwards, injector active flow supply pressure regulating valve is closed.
2. according to the method described in claim 1, it is characterized by: the engine testsand includes that engine fuel supply is cut
Only valve, oxygen supply shut-off valve and alcohol supply shut-off valve, in the use process of engine testsand, open engine fuel supply
Engine fuel is opened before flow control valve and supplies shut-off valve, opens oxygen supply shut-off valve before opening oxygen supply flow control valve,
Alcohol supply shut-off valve is opened before opening alcohol supply flow rate regulating valve；It is closed after closing engine fuel supply flow rate regulating valve
Engine fuel supplies shut-off valve, closes oxygen supply shut-off valve after closing oxygen supply flow control valve, closes alcohol supply flow rate
Alcohol is closed after regulating valve supplies shut-off valve.
3. according to the method described in claim 1, it is characterized by:
In step S300, alcohol supply flow rate regulating valve and starting ignition are adjusted according to the inlet total temperature of the first emulation mode point
Device, lighting alcohol makes alcohol burn, and the alcohol of burning exchanges heat in the second medium in first medium channel and second medium channel, makes
The total temperature of second medium by second medium channel outlet is identical as the inlet total temperature of the first emulation mode point engine；
S310), alcohol supply flow rate regulating valve, starting ignition are adjusted according to the highest operating condition value that temperature simulation unit can bear
Device, lighting alcohol makes alcohol burn, and the alcohol of burning exchanges heat in the second medium in first medium channel and second medium channel；
S320), state to the temperature simulation unit of step S310 is kept to enter steady-working state；
S330), according in the first emulation mode point, the second medium total temperature of second medium channel outlet, in second medium channel
The quality of second medium, the specific heat at constant pressure of second medium, inboard wall of tube body convection transfer rate, the inner wall area of entire tube body, the
The quality of first medium in one medium channel, the specific heat at constant pressure of first medium, tube wall convection transfer rate, entire tube body
The second medium total temperature of outer wall area and second medium feeder connection, determines the supplying temperature of first medium；
S340), alcohol supply flow rate regulating valve is adjusted, by the first medium state in first medium channel by with temperature simulation list
The highest operating condition value supply that member can bear is adjusted to the predetermined value supply according to the first simulation test state point；
S350), the first medium in first medium channel is kept to supply according to the predetermined value of the first simulation test state point of experiment
State to temperature simulation unit enters steady-working state, at this point, the total temperature of the second medium by second medium channel outlet
It is identical as the inlet total temperature of the first emulation mode point engine.
4. according to the method described in claim 1, it is characterized by:
In step S600, injector active flow supply pressure regulating valve is adjusted respectively, is adjusted oxygen supply flow control valve, is started
Machine air inlet supply pressure regulating valve, alcohol supply flow rate regulating valve and engine fuel supply flow rate regulating valve, make in boiler-plate
Pressure it is identical as the environmental pressure of engine flight height of N emulation mode point, second medium channel outlet second be situated between
Stagnation pressure, total temperature and the oxygen content of matter are identical as the inlet total pressure of N emulation mode point engine, total temperature and oxygen content, and fuel oil supplies
The fuel oil supplied to source is identical as the fuel demand of N emulation mode point engine；Wherein, N >=2；Include the following steps:
S610), injector active flow supply pressure is adjusted according to the environmental pressure of the engine flight height of N emulation mode point
Force regulating valve keeps the pressure in boiler-plate identical as the environmental pressure of engine flight height of N emulation mode point；
S620), oxygen supply flow control valve is adjusted, the oxygen content of the second medium of second medium channel outlet and N are simulated
The oxygen content of state point engine is identical；
S630), according in N emulation mode point, the second medium total temperature of second medium channel outlet, in second medium channel
The quality of second medium, the specific heat at constant pressure of second medium, inboard wall of tube body convection transfer rate, the inner wall area of entire tube body, first
The quality of first medium in medium channel, the specific heat at constant pressure of first medium, tube wall convection transfer rate, entire tube body it is outer
The second medium total temperature of wall area and second medium feeder connection, determines the supplying temperature of first medium；
S640), alcohol supply flow rate regulating valve is adjusted, by the first medium state in first medium channel by the first simulation test
The predetermined value supply of state point is adjusted to the predetermined value supply according to N simulation test state point；
S650), the first medium in first medium channel is kept to supply shape according to the predetermined value of experiment N simulation test state point
State to temperature simulation unit enters steady-working state, at this point, the total temperature of the second medium by second medium channel outlet with
The inlet total temperature of N emulation mode point engine is identical；
S660), engine charge supply pressure regulating valve is adjusted according to the inlet total pressure of N emulation mode point, made by second
The stagnation pressure of the second medium of medium channel outlet is identical as the inlet total pressure of N emulation mode point engine；
S670), engine fuel supply flow rate regulating valve is adjusted according to the fuel demand amount of engine N emulation mode point, made
The fuel oil of fuel delivery source supply is identical as the fuel demand amount of engine N emulation mode point.
5. according to the method described in claim 3, it is characterized by:
The highest operating condition value that temperature simulation unit can bear is the maximal pressure for the first medium that temperature simulation unit can bear
Power, maximum temperature and maximum flow；The parameter of the predetermined value of simulation test state point includes the pressure of medium inlet and outlet, is situated between
The flow of matter and the temperature of medium.
6. the method according to claim 3 or 4, it is characterised in that:
In step S320, state to the temperature simulation unit of step S310 is kept to enter steady-working state, the required time is
T1；The first medium in first medium channel is kept to supply in step S350 according to the predetermined value of the first simulation test state point of experiment
Enter steady-working state to state to temperature simulation unit, the required time is T2；Keep first medium logical in step S650
First medium in road enters stabilization according to predetermined value supply state to the temperature simulation unit of experiment N simulation test state point
Working condition, required time are TN；
T1, T2And TNEnter steady-working state calculation formula according to temperature simulation unit to determine；Temperature simulation unit enters steady
Determine working condition calculation formula are as follows:
In formula: TxEnter the time of steady-working state, unit s for temperature simulation unit；M is the quality of entire tube body, unit
It is known quantity for kg；cmpFor the specific heat at constant pressure of tube body, unit J/kgK is known quantity；hhFor inboard wall of tube body heat convection
Coefficient, unit are W/ (m2It K), is known quantity；AsiFor the inner wall area of entire tube body, unit m2, it is known quantity；mhFor
The quality of first medium in first medium channel, unit kg are known quantity；cphFor the specific heat at constant pressure of first medium, unit
It is known quantity for J/kgK；hcFor tube wall convection transfer rate, unit is W/ (m2It K), is known quantity；AseIt is entire
The outer wall area of tube body, unit m2, it is known quantity；mcFor the quality of the second medium in second medium channel, unit is
Kg is known quantity；cpcFor the specific heat at constant pressure of second medium, unit J/kgK is known quantity.
7. the method according to claim 3 or 4, it is characterised in that:
In step S330, according in the first emulation mode point, the second medium total temperature of second medium channel outlet, second medium leads to
The quality of second medium in road, the specific heat at constant pressure of second medium, inboard wall of tube body convection transfer rate, the inner wall of entire tube body
It is long-pending, the quality of first medium in first medium channel, the specific heat at constant pressure of first medium, tube wall convection transfer rate, entirely
The outer wall area of tube body and the second medium total temperature of second medium feeder connection, determine the supplying temperature of first medium, at this point, the
The supplying temperature of one medium is Thi1；
In step S630, according in N emulation mode point, the second medium total temperature of second medium channel outlet, second medium leads to
The quality of second medium in road, the specific heat at constant pressure of second medium, inboard wall of tube body convection transfer rate, the inner wall of entire tube body
It is long-pending, the quality of first medium in first medium channel, the specific heat at constant pressure of first medium, tube wall convection transfer rate, entirely
The outer wall area of tube body and the second medium total temperature of second medium feeder connection, determine the supplying temperature of first medium, at this point, the
The supplying temperature of one medium is ThiN；
Thi1And ThiNDetermined according to temperature simulation unit hot-fluid input temp formula；Temperature simulation unit hot-fluid input temp is public
Formula are as follows:
In formula:
ThixFor the supplying temperature of first medium, unit K；TcoFor the second medium total temperature of second medium channel outlet, unit is
K is known quantity；mcFor the quality of second medium in second medium channel, unit kg is known quantity；cpcFor determining for second medium
Pressure ratio heat, unit J/kgK are known quantity；hhFor inboard wall of tube body convection transfer rate, unit is W/ (m2It K), is known
Amount；AsiFor the inner wall area of entire tube body, unit m2, it is known quantity；mhFor the quality of first medium in first medium channel,
Unit is kg, is known quantity；cphFor the specific heat at constant pressure of first medium, unit J/kgK is known quantity；hcFor tube wall
Convection transfer rate, unit are W/ (m2It K), is known quantity；AseFor the outer wall area of entire tube body, unit m2, it is known
Amount；TciFor the second medium total temperature of second medium feeder connection, unit K is known quantity.
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