CN114112406A - Test device for measuring cooling hole of flame tube - Google Patents
Test device for measuring cooling hole of flame tube Download PDFInfo
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- CN114112406A CN114112406A CN202111443252.8A CN202111443252A CN114112406A CN 114112406 A CN114112406 A CN 114112406A CN 202111443252 A CN202111443252 A CN 202111443252A CN 114112406 A CN114112406 A CN 114112406A
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- 238000012360 testing method Methods 0.000 title claims abstract description 156
- 238000001816 cooling Methods 0.000 title claims abstract description 110
- 239000011521 glass Substances 0.000 claims description 22
- 230000003068 static effect Effects 0.000 claims description 21
- 238000012544 monitoring process Methods 0.000 claims description 6
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 5
- 230000001464 adherent effect Effects 0.000 abstract description 3
- 238000012795 verification Methods 0.000 abstract description 3
- 230000000903 blocking effect Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 238000002485 combustion reaction Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
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- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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Abstract
The invention discloses a test device for measuring a cooling hole of a flame tube, which comprises: the device comprises a main flow air inlet assembly, an exhaust assembly, a secondary flow air inlet assembly, a test case and a supporting seat; the main flow air inlet assembly is mounted on the test case through a bolt; the exhaust assembly is mounted on the test case through a bolt; the supporting seat is installed on the test case through a bolt; the secondary flow air inlet assembly is mounted on one side of the supporting seat through a bolt. The test device can measure the flow field characteristics and the cooling efficiency of the cooling holes of the flame tube; the device is provided with a swirler and a head air inlet, so that the flow state of the real main flow rotational flow in the flame tube is simulated as much as possible; the initial cooling airflow forms an adherent cooling air film after passing through a slot formed between the cooling fin and the test plate, and the flowing state of a real main flow in the flame tube is simulated; the lead mounting seat is arranged, so that real-time verification of wall temperature data measured by the thermal infrared imager is facilitated.
Description
Technical Field
The invention belongs to the technical field of aero-engine tests, and particularly relates to a test device for measuring a cooling hole of a flame tube.
Background
With the increasing requirements on the performance of aircraft engines, which lead to the increasing of the inlet temperature and temperature rise of the combustion chamber, the cooling problem of the flame tube is receiving more and more attention from researchers, because it will affect the service life of the combustion chamber. The development of flow field characteristic analysis and cooling efficiency measurement of a flame tube cooling structure or a cooling hole is a main channel for researching the cooling problem of the flame tube, the cooling mechanism of the cooling structure or the cooling hole can be explored through the flow field characteristic analysis, so that the cooling potential is deeply explored, the cooling efficiency is an index for measuring the cooling effect of the cooling structure or the cooling hole, and the cooling efficiency of the flame tube cooling hole is very important design data in the design and development of a combustion chamber. However, different cooling holes of different cooling structures of the flame tube and even different forms of cooling holes all cause different flow field characteristics and cooling efficiencies, and because of many factors influencing the cooling efficiency, it is very important to obtain high-precision cooling efficiency data and flow field characteristics of the cooling holes in the flame tube in a real state, and only a test method is available.
At present, two different sets of test devices are required to be adopted to respectively measure the flow field characteristics and the cooling efficiency of the cooling holes of the flame tube by a test method, and the method for measuring the cooling efficiency of the cooling holes of the flame tube mainly comprises the following steps: the test section is designed into a double-airflow channel structure form with a main flow and a secondary flow separated, the test plate is arranged between the main flow channel and the secondary flow channel, partial secondary flow air enters the main flow channel through the cooling holes in the test plate under the action of pressure difference and then is discharged along with the main flow, the rest air in the secondary flow is separately discharged from the secondary flow outlet, and the cooling efficiency of the cooling holes under different airflow parameters or structural parameters is obtained through tests.
The current cooling hole flow field testing device cannot be shared with a cooling efficiency testing device, so that the processing cost of a test switching section and the complexity of a test process are greatly increased. The cooling efficiency test device has the following defects: although the influence of secondary flow of two channels of a combustion chamber and main flow of a flame tube is considered in the test process, the influence of the rotation of the head of the flame tube and the influence of an initial cooling air film are not considered in the main flow, the influence of heat conduction of a test switching section on the accuracy of a test result is large in the test process, the air flow passing through a cooling hole in a test plate cannot be directly obtained, two flowmeters are required to be obtained through an indirect measurement method, the flow of a main flow inlet is subtracted from the flow of a main flow outlet, or the flow of a secondary flow outlet is subtracted from the flow of a secondary flow inlet, and the error of test data is large due to the adoption of the flow obtaining mode.
Disclosure of Invention
In order to solve the problems, the invention discloses a test device for measuring a cooling hole of a flame tube, which comprises: the device comprises a main flow air inlet assembly, an exhaust assembly, a secondary flow air inlet assembly, a test case and a supporting seat;
the main flow air inlet assembly is mounted on the test case through a bolt;
the exhaust assembly is mounted on the test case through a bolt;
the supporting seat is installed on the test case through a bolt;
the secondary flow air inlet assembly is mounted on one side of the supporting seat through a bolt.
Still further, still include: a swirler mount and a swirler;
the swirler mounting seat is of a rectangular structure, a swirler mounting hole is formed in the middle of the swirler mounting seat, and a second groove is formed in the upper side of the swirler mounting seat;
the swirler is installed on the swirler installation seat; the swirler mount pad is mounted on the main flow air intake assembly through a screw.
Still further, still include: a cooling fin;
the cooling fin is of a straight-section sheet structure;
the cooling fins are mounted on the swirler mounting seats through screws.
Still further, still include: test plates, glass and cover plates;
the test plate is of a plate-shaped structure, and bolt holes are formed in the periphery of the test plate;
a cooling hole is formed in the middle of the test plate;
the test board is arranged on the supporting seat through screws;
the glass is arranged on the test case;
the cover plate is installed on the testing machine box through screws.
Furthermore, the main flow air inlet assembly comprises a first flange, an air inlet cylinder, a first total pressure and total temperature measuring seat, a second flange, a first static pressure nozzle, a flange boss and a head air inlet;
the main flow air inlet assembly is of a rectangular channel structure with openings at two ends;
bolt holes are formed in the periphery of the first flange and used for being connected with the air inlet section of the trolley;
bolt holes are formed in the periphery of the second flange and used for being connected with the test case; a flange boss of the flange II is provided with a threaded hole for connecting with a mounting seat of the swirler; a head air inlet hole is formed in the upper side of the flange boss;
the air inlet cylinder is provided with a total pressure and total temperature measuring seat I and a static pressure nozzle I which are used for measuring the pressure and the temperature of the position of the main flow air inlet.
Furthermore, the exhaust assembly comprises an exhaust cylinder body, a flange III, a flange IV, a total pressure and total temperature measuring seat II and a static pressure joint II;
the exhaust assembly is of a rectangular channel structure with openings at two ends;
bolt holes are formed in the peripheries of the third flange and the fourth flange, the bolt holes in the third flange are used for being connected with a test machine box, and the bolt holes in the fourth flange are used for being connected with an exhaust section of the turning table;
and a second total pressure and total temperature measuring seat and a second static pressure connecting nozzle are arranged on the exhaust cylinder body and are used for monitoring the temperature and the pressure of the position of the main flow outlet.
Furthermore, the secondary flow air inlet assembly comprises a fifth flange, a rectangular cylinder, a bottom cover plate, an air guide pipeline, a sixth flange, a lead wire mounting seat and a third static pressure connecting nozzle;
the secondary flow air inlet assembly is of a cylindrical structure and is provided with an air inlet end and an air outlet end;
bolt holes are formed in the periphery of the flange V;
the bottom cover plate is arranged at the bottom of the rectangular cylinder;
the air-entraining pipeline is arranged on one side of the rectangular cylinder;
the sixth flange is arranged at the inlet of the air guide pipeline, and bolt holes are formed in the periphery of the sixth flange and used for being connected with the air inlet section of the trolley platform;
the lead mounting seat is arranged on one side of the rectangular barrel;
and a third static pressure nozzle is arranged on the side surface of the rectangular cylinder and used for monitoring the pressure at the position of the secondary flow inlet.
Furthermore, the testing machine box is provided with a first opening, a second opening, a third opening, a fourth opening, a fifth opening, a sixth opening and a first groove;
the test case is of a rectangular structure;
the first opening is connected with the main flow air inlet assembly; the second opening is connected with the exhaust assembly; the opening III is used for installing glass; the opening IV is connected with the supporting seat and the secondary flow air inlet assembly; and the fifth opening and the sixth opening are used for installing glass or a blocking plate.
Furthermore, the supporting seat comprises a boss structure and an air guide hole;
the supporting seat is of a hollow rectangular structure;
the air guide hole is arranged on one side of the supporting seat and used for providing a channel for initial cooling air flow.
Furthermore, the boss structure comprises a test board mounting surface and a supporting seat mounting surface; the mounting surface of the test board is higher than the mounting surface of the supporting seat; threaded holes are formed in the periphery of the mounting surface of the test plate and used for mounting the test plate; bolt holes are formed in the periphery of the mounting surface of the supporting seat and used for being connected and fixed with the test casing and the secondary flow air inlet assembly.
Compared with the prior art, the invention has the beneficial effects that:
1) the two test functions of the flow field characteristic and the cooling efficiency of the flame tube cooling hole are combined into one, so that the processing cost of the test switching section and the complexity of the test process are greatly reduced;
2) the test device is provided with a swirler and a head air inlet, and the flow state of the real main flow rotational flow in the flame tube is simulated as much as possible;
3) the test device is characterized in that mass flowmeters can be respectively arranged in front of the main flow air inlet assembly and behind the secondary flow air inlet assembly, air flow in the secondary flow air inlet assembly is divided into two channels, and accurate mass flow data of an initial cooling air film and a cooling hole in a test plate can be respectively obtained by measuring flow coefficient data of an air guide hole in a support seat;
4) the test device is provided with an initial cooling air flow channel, and the initial cooling air flow forms an adherent cooling air film after passing through a slot formed between the cooling fin and the test plate, so that the flowing state of a real main flow in the flame tube is simulated as much as possible;
5) the testing device is provided with the lead mounting seat, so that the wall temperature of the testing plate can be measured by the thermocouple while the thermal infrared imager is used for measuring the wall temperature of the testing plate, real-time verification can be conveniently carried out on wall temperature data measured by the thermal infrared imager, and the accuracy of the wall temperature measured by the thermal infrared imager is ensured.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 shows a schematic structural diagram of a test apparatus according to an embodiment of the present invention;
FIG. 2 shows an enlarged view at A in FIG. 1;
fig. 3 shows a cross-sectional view along the line S-S in fig. 1.
Reference numerals: 1. a mainstream gas intake assembly; 101. a first flange; 102. an air inlet cylinder; 103. a total pressure and total temperature measuring base I; 104. a second flange; 105. a first static pressure connecting nozzle; 106. a flange boss; 107. a head air inlet;
2. an exhaust assembly; 201. an exhaust cylinder; 202. a third flange; 203. fourthly, a flange; 204. a total pressure and total temperature measuring base II; 205. a second static pressure connecting nozzle;
3. a secondary flow air intake assembly; 301. fifthly, forming a flange; 302. a rectangular cylinder; 303. a bottom cover plate; 304. a bleed air duct; 305. a sixth flange; 306. a lead wire mounting base; 307. a third static pressure connecting nozzle;
4. a test case; 401. a first opening; 402. a second opening; 403. opening three; 404. opening four; 405. opening five; 406. opening six; 407. a first groove;
5. a supporting seat; 501. mounting a test board; 502. a support seat mounting surface; 503. an air vent;
6. a test plate;
7. a swirler mount; 701. a swirler mounting hole; 702. a second groove;
8. a swirler;
9. a cooling fin;
10. glass;
11. a cover plate;
12. and (6) blocking plates.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the test device for measuring a cooling hole of a liner according to the present invention includes:
the device comprises a main stream air inlet assembly 1, an exhaust assembly 2, a secondary stream air inlet assembly 3, a test casing 4, a supporting seat 5, a test plate 6, a swirler mounting seat 7, a swirler 8, a cooling fin 9, glass 10, a cover plate 11, a blocking plate 12 and other assemblies;
the main flow air inlet assembly 1 is installed on a left side installation surface of the test case 4 through bolts;
the exhaust assembly 2 is mounted on a right mounting surface of the test case 4 through bolts;
the supporting seat 5 is installed on the lower side installation surface of the test case 4 through bolts;
the secondary flow air inlet assembly 3 is arranged below the supporting seat 5 through bolts; the secondary air inlet assembly 3, the supporting seat 5 and the test case 4 are connected through bolts.
As shown in fig. 2, the swirler 8 is mounted on the swirler mounting seat 7, and the swirler mounting seat 7 is mounted on the outer side of the second flange 104 of the main stream air inlet assembly 1 through screws; the swirler mounting seat 7 is of a rectangular structure, bolt holes are formed in the periphery of the swirler mounting seat, a plurality of swirler mounting holes 701 with threads are formed in the middle of the swirler mounting seat and used for mounting a swirler 8, and a second groove 702 is formed in the upper side of the swirler mounting seat and used for guiding head cooling air to be close to the wall surface and preventing the air from damaging rotating air flow after entering the test case 4; the swirler 8 rotates airflow to generate high-speed rotating jet flow in the head area in the flame tube so as to form a backflow area, and the swirler 8 is provided with threads which are matched and connected with a swirler mounting hole 701 on the swirler mounting seat 7;
the cooling fin 9 is of a straight-section sheet structure, the cooling fin 9 is installed on the swirler mounting seat 7 through a screw, and the cooling fin 9, the swirler mounting seat 7 and the main stream air inlet assembly 1 are connected through screws; after the cooling fins 9 are installed, a slot with a certain height W is formed between the cooling fins and the test board 6, the value range of W is 1.5 mm-2 mm, and the initial cooling airflow passes through the slot to form an adherent cooling air film so as to simulate the initial cooling air film at the initial end of the real flame tube;
the test plate 6 is of a square plate-shaped structure, bolt holes are formed in the periphery of the test plate, the test plate is mounted on the supporting seat 5 through screws and is positioned between the test casing 4 and the secondary flow air inlet assembly 3; a cooling hole is arranged in the middle of the test plate 6 and is a measured object;
the glass 10 is arranged on the test case 4;
the cover plate 11 is mounted on the testing machine case 4 through screws, and simultaneously the glass 10 or the blocking plate 12 is mounted in the first grooves 407 on the front side and the rear side, the glass 10 is mounted when the flow field test is carried out, the blocking plate 12 is mounted when the cold efficiency test is carried out, and the cover plate 11 is fixed on the testing machine case 4 through screws on the outer side of the glass 10 or the blocking plate 12.
The test device is used for measuring the flow field characteristics and the cooling efficiency of the cooling holes of the flame tube. The two test functions are combined into one, so that the processing cost of the test switching section and the complexity of the test process are greatly reduced. Although the test apparatus of the present invention has been exemplified by measuring the flow field characteristics and the cooling efficiency of the combustor cooling holes, the present invention is not limited thereto, and it is also possible to measure other properties of the combustor cooling holes. One skilled in the art can combine the features of the present invention with each other to achieve the same purpose, as well as to achieve a better understanding of the principles of the invention.
The main flow air inlet assembly 1 comprises a first flange 101, an air inlet cylinder 102, a total pressure and total temperature measuring seat 103, a second flange 104, a first static pressure nozzle 105, a flange boss 106 and a head air inlet 107;
the main flow air inlet assembly 1 is of a rectangular channel structure with two open ends; bolt holes are formed in the periphery of the first flange 101 and used for being connected with the air inlet section of the trolley; bolt holes are formed in the periphery of the second flange 104 and used for being connected with the test case 4; as shown in fig. 2, a flange boss 106 of the second flange 104 is provided with a threaded hole for connecting with the swirler mounting seat 7; a head air inlet hole 107 is arranged on the upper side of the flange boss 106 and is an air inlet channel for simulating cooling air at the head of the flame tube; a total pressure and total temperature measuring seat I103 and a static pressure connecting nozzle I105 are arranged on the same cross section of the air inlet cylinder 102 and are used for measuring the pressure and the temperature of the position of a main flow air inlet. The test device is provided with a swirler 8 and a head air inlet 107, and the flow state of the real main flow rotational flow in the flame tube is simulated as much as possible.
The exhaust assembly 2 comprises an exhaust cylinder 201, a flange III 202, a flange IV 203, a total pressure and total temperature measuring seat II 204 and a static pressure connecting nozzle II 205;
the exhaust component 2 is a rectangular channel structure with two open ends; bolt holes are formed in the peripheries of the third flange 202 and the fourth flange 203, the bolt holes in the third flange 202 are used for being connected with the test case 4, and the bolt holes in the fourth flange 203 are used for being connected with the exhaust section of the vehicle platform; and a second total pressure and total temperature measuring seat 204 and a second static pressure connector 205 are arranged on the same section of the exhaust cylinder 201 and are used for monitoring the temperature and the pressure at the position of the main flow outlet.
The secondary flow air inlet assembly 3 comprises a flange five 301, a rectangular cylinder 302, a bottom cover plate 303, a bleed air pipeline 304, a flange six 305, a lead wire mounting seat 306 and a static pressure connector three 307;
the secondary flow air inlet component 3 is of a cylindrical structure and is provided with an air inlet end and an air outlet end; bolt holes are formed in the periphery of the flange five 301 and are used for being connected with the supporting seat 5 and the testing case; the bottom cover plate 303 is arranged at the bottom of the rectangular cylinder 302; the bleed air duct 304 is provided on one side of the rectangular cylinder 302; the sixth flange 305 is arranged at the inlet of the bleed air pipeline 304, and bolt holes are formed in the periphery of the sixth flange 305 and are used for being connected with the air inlet section of the vehicle platform; the lead wire mounting seat 306 is arranged on one side of the rectangular cylinder 302 and used for leading out thermocouple wires welded on the test board 6 and ensuring sealing; and a third static pressure nozzle 307 is arranged on the side surface of the rectangular cylinder 302 and is used for monitoring the pressure at the position of the secondary flow inlet.
The testing device is provided with the lead mounting seat 306, when the thermal infrared imager measures the wall temperature of the testing plate 6, the wall temperature of the testing plate 6 can be measured by the thermocouple, so that real-time verification of wall temperature data measured by the thermal infrared imager is facilitated, and the accuracy of the wall temperature measured by the thermal infrared imager is ensured.
The testing device can be respectively provided with mass flowmeters in front of the main flow air inlet assembly 1 and behind the secondary flow air inlet assembly 3, and meanwhile, the airflow in the secondary flow air inlet assembly 3 is divided into two channels, and accurate mass flow data of the initial cooling air film and the cooling holes in the test plate 6 can be respectively obtained by measuring the flow coefficient data of the air bleed holes 503 in the supporting seat 5.
As shown in fig. 1, the test case 4 is provided with openings on the left, right, upper, lower, front and rear sides, namely, an opening one 401, an opening two 402, an opening three 403, an opening four 404, an opening five 405, an opening six 406 and a first concave slot 407;
the test case 4 is of a rectangular structure; threaded holes are formed in the mounting edges of the six opening positions, and the first opening 401 is connected with the main flow air inlet assembly 1; the second opening 402 is connected with the exhaust component 2; the third opening 403 is used for installing the glass 10; the opening four 404 is connected with the supporting seat 5 and the secondary flow air inlet assembly 3; as shown in fig. 3, the five and six openings 405 and 406 are used for mounting the glass 10 or the blocking plate 12, the glass 10 or the blocking plate 12 is mounted in the first recess 407, and is fixed by the cover plate 11 through screws, and rubber or asbestos pads are disposed on both upper and lower sides of the glass 10 to seal and protect the glass 10. And the matching surfaces of all the connecting parts are provided with sealing gaskets so as to ensure the sealing of the test switching section.
The supporting seat 5 comprises a boss structure and a gas-guiding hole 503;
the supporting seat 5 is a hollow rectangular structure; the air guide hole 503 is provided on one side of the support base 5, and communicates with the slit between the cooling fin 9 and the test plate 6 to provide a passage for the initial cooling air flow. The initial cooling air film is fed through the air guide holes 503 on the supporting seat 5, so that the cooling air flow is prevented from being heated to simulate the real state of the wall surface of the flame tube cylinder, and the mass flow of the initial cooling air film is obtained by converting the flow coefficient data of the air guide holes 503 and the actually measured pressure;
the boss structure comprises two mounting surfaces, namely an outer test board mounting surface 501 and an inner supporting seat mounting surface 502; the test board mounting surface 501 is higher than the supporting seat mounting surface 502; threaded holes are formed in the periphery of the test board mounting surface 501 and used for mounting a test board 6; bolt holes are formed in the periphery of the supporting seat mounting surface 502 and used for being connected and fixed with the test casing 4 and the secondary flow air inlet assembly 3.
The air flow path of the test device is as shown by the arrow in fig. 1, the high-temperature air flow of the main flow enters the air inlet cylinder 102 from the first flange 101 in the main flow air inlet assembly 1, most of the air enters the test case 4 through the swirler 8 and forms a rotating air flow to simulate the head backflow area in a real flame tube, and the remaining small part of the air enters the test case 4 through the head air inlet holes 107 on the second flange 104 to simulate the cooling air inlet of the flame tube head. The secondary flow air enters the rectangular cylinder 302 through a flange six 305 in the secondary flow air inlet assembly 3, then is divided into two flows, one flow enters a cavity formed by the cooling sheet 9 and the test plate 6 through an air guide hole 503 on the supporting seat 5, and then forms a cooling air film tightly attached to the test plate 6 after passing through a slot, so as to simulate an initial cooling air film at the initial position of the inner and outer ring wall surfaces in a real flame tube; another part of the air enters the test case 4 through the cooling holes on the test plate 6, and the multiple air flows are converged in the test case 4 and then flow out from the outlet of the exhaust assembly 2 after being unified. The main flow refers to the flow of air flow inside the flame tube, and the secondary flow refers to the flow of air flow between the flame tube and the combustion chamber casing.
Before the test, the flow coefficient of the bleed holes 503 on the support base 5 needs to be measured by using the test device, and the method comprises the steps of blocking the cooling holes on the test board 6 under the condition of main stream air supply, simultaneously supplying secondary stream air, and measuring the secondary stream flow under different secondary stream inlet pressure parameters. After the step is finished, when a flow field test and a cold effect test of the cooling hole of the flame tube are carried out, the mass flow of the initial cooling air film can be obtained by converting the flow coefficient data of the air guide hole and the actually measured pressure of the secondary inflow inlet, and the mass flow of the cooling hole is the difference value of the secondary flow and the initial cooling air film.
And (3) flow field characteristic test: and simultaneously supplying airflow which corresponds to the working condition and contains tracer particles to the main flow air inlet assembly 1 and the secondary flow air inlet assembly 3, irradiating light through 3 glass 10 arranged on the test case 4, and shooting through a camera at the outlet of the exhaust assembly 2 or other glass 10 to obtain flow field characteristics of the interior of the test case 4 and the outlet of the cooling hole.
Cold efficiency test: and simultaneously supplying air flows of corresponding working conditions to the main flow air inlet assembly 1 and the secondary flow air inlet assembly 3, measuring the temperature of the wall surface of the test plate 6 by using an infrared thermal imager through the glass 10 at the upper end, simultaneously welding a thermocouple on the test plate 6, checking the data measured by the infrared thermal imager according to the data measured by the thermocouple, thus obtaining accurate wall temperature data of the test plate 6, and calculating by a formula to obtain the cooling efficiency under each working condition.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A test device for measuring a cooling hole of a flame tube is characterized by comprising: the device comprises a main flow air inlet assembly (1), an exhaust assembly (2), a secondary flow air inlet assembly (3), a test case (4) and a supporting seat (5);
the main flow air inlet assembly (1) is mounted on the test case (4) through a bolt;
the exhaust assembly (2) is mounted on the test case (4) through bolts;
the supporting seat (5) is installed on the test case (4) through a bolt;
the secondary flow air inlet assembly (3) is installed on one side of the supporting seat (5) through bolts.
2. The test device for measuring a liner cooling hole of claim 1, further comprising: a swirler mount (7) and a swirler (8);
the swirler mounting seat (7) is of a rectangular structure, a swirler mounting hole (701) is formed in the middle of the swirler mounting seat, and a second groove (702) is formed in the upper side of the swirler mounting seat;
the swirler (8) is arranged on the swirler mounting seat (7); the swirler mounting seat (7) is mounted on the main flow air inlet assembly (1) through a screw.
3. The test device for measuring a liner cooling hole of claim 2, further comprising: a cooling fin (9);
the cooling fin (9) is of a straight-section sheet structure;
the cooling fins (9) are mounted on the swirler mounting base (7) through screws.
4. The test device for measuring a cooling hole of a liner according to claim 1 or 2, further comprising: a test plate (6), glass (10) and a cover plate (11);
the test plate (6) is of a plate-shaped structure, and bolt holes are formed in the periphery of the test plate;
a cooling hole is formed in the middle of the test plate (6);
the test plate (6) is arranged on the supporting seat (5) through screws;
the glass (10) is arranged on the test case (4);
the cover plate (11) is installed on the test case (4) through screws.
5. The test device for measuring the cooling hole of the flame tube is characterized in that the main flow air inlet assembly (1) comprises a first flange (101), an air inlet cylinder body (102), a first total pressure and total temperature measuring seat (103), a second flange (104), a first static pressure nozzle (105), a flange boss (106) and a head air inlet hole (107);
the main flow air inlet assembly (1) is of a rectangular channel structure with two open ends;
bolt holes are formed in the periphery of the first flange (101) and are used for being connected with the air inlet section of the trolley;
bolt holes are formed in the periphery of the second flange (104) and used for being connected with the test case (4); a flange boss (106) of the second flange (104) is provided with a threaded hole for connecting with the swirler mounting seat (7); a head air inlet hole (107) is formed in the upper side of the flange boss (106);
the air inlet cylinder (102) is provided with a total pressure and total temperature measuring seat I (103) and a static pressure connecting nozzle I (105) which are used for measuring the pressure and the temperature of the position of a main flow air inlet.
6. The test device for measuring the cooling hole of the flame tube as claimed in claim 1, wherein the exhaust assembly (2) comprises an exhaust cylinder body (201), a flange three (202), a flange four (203), a total pressure and temperature measuring base two (204) and a static pressure connecting nozzle two (205);
the exhaust component (2) is of a rectangular channel structure with two open ends;
bolt holes are formed in the peripheries of the third flange (202) and the fourth flange (203), the bolt holes in the third flange (202) are used for being connected with the test case (4), and the bolt holes in the fourth flange (203) are used for being connected with the exhaust section of the trolley;
and a second total pressure and total temperature measuring seat (204) and a second static pressure connecting nozzle (205) are arranged on the exhaust cylinder body (201) and are used for monitoring the temperature and the pressure of the position of the main flow outlet.
7. The test device for measuring the cooling hole of the flame tube as claimed in claim 1, wherein the secondary flow air inlet assembly (3) comprises a flange five (301), a rectangular cylinder body (302), a bottom cover plate (303), a bleed air pipeline (304), a flange six (305), a lead wire mounting seat (306) and a static pressure nozzle three (307);
the secondary flow air inlet assembly (3) is of a cylindrical structure and is provided with an air inlet end and an air outlet end;
bolt holes are formed in the periphery of the flange five (301);
the bottom cover plate (303) is arranged at the bottom of the rectangular cylinder (302);
the bleed air duct (304) is arranged on one side of the rectangular cylinder (302);
the six flanges (305) are arranged at the inlet of the air guide pipeline (304), and bolt holes are formed in the periphery of the six flanges (305) and are used for being connected with an air inlet section of the vehicle platform;
the lead mounting seat (306) is arranged on one side of the rectangular cylinder (302);
and a static pressure nozzle III (307) is arranged on the side surface of the rectangular cylinder (302) and is used for monitoring the pressure at the position of the secondary flow inlet.
8. The test device for measuring a liner cooling hole according to claim 1, wherein the test case (4) is provided with an opening one (401), an opening two (402), an opening three (403), an opening four (404), an opening five (405), an opening six (406) and a first groove (407);
the test case (4) is of a rectangular structure;
the first opening (401) is connected with the main flow air inlet assembly (1); the second opening (402) is connected with the exhaust component (2); the opening III (403) is used for installing glass (10); the opening four (404) is connected with the supporting seat (5) and the secondary flow air inlet assembly (3); the opening five (405) and the opening six (406) are used for installing the glass (10) or the blanking plate (12).
9. The test device for measuring the cooling hole of the flame tube as claimed in claim 4, wherein the supporting seat (5) comprises a boss structure and an air guide hole (503);
the supporting seat (5) is of a hollow rectangular structure;
the air guide holes (503) are arranged on one side of the supporting seat (5) and are used for providing channels for initial cooling air flow.
10. The test device for measuring a liner cooling hole of claim 9, wherein the boss structure comprises a test plate mounting surface (501) and a support seat mounting surface (502); the test board mounting surface (501) is higher than the supporting seat mounting surface (502); threaded holes are formed in the periphery of the test board mounting surface (501) and used for mounting a test board (6); bolt holes are formed in the periphery of the supporting seat mounting surface (502) and used for being connected and fixed with the test casing (4) and the secondary flow air inlet assembly (3).
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| CN202111443252.8A CN114112406A (en) | 2021-11-30 | 2021-11-30 | Test device for measuring cooling hole of flame tube |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111443252.8A CN114112406A (en) | 2021-11-30 | 2021-11-30 | Test device for measuring cooling hole of flame tube |
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