CN116539318B - High-precision ramjet engine test model device and use method - Google Patents
High-precision ramjet engine test model device and use method Download PDFInfo
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- CN116539318B CN116539318B CN202310268242.8A CN202310268242A CN116539318B CN 116539318 B CN116539318 B CN 116539318B CN 202310268242 A CN202310268242 A CN 202310268242A CN 116539318 B CN116539318 B CN 116539318B
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- 238000012360 testing method Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000012545 processing Methods 0.000 claims abstract description 14
- 238000003466 welding Methods 0.000 claims abstract description 11
- 238000005553 drilling Methods 0.000 claims description 6
- 238000003801 milling Methods 0.000 claims description 6
- 208000032544 Cicatrix Diseases 0.000 claims description 3
- 231100000241 scar Toxicity 0.000 claims description 3
- 230000037387 scars Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000003754 machining Methods 0.000 abstract 3
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
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Classifications
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
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Abstract
The invention discloses a high-precision ramjet engine test model device and a use method thereof, wherein the device comprises the following components after disassembly: the device comprises an inlet limiting flange, an upper wall panel block, a lower wall panel block, a y-direction limiting bolt, a z-direction limiting bolt, a limiting column, an x-direction positioning nail, a y-direction positioning nail and an outlet limiting flange. The ramjet test model device obtained by the method can ensure the dimensional accuracy of the inlet and the outlet of the engine after the processing and manufacturing are finished, meanwhile, the positive/reverse steps of the outlet and the inlet of the engine model can be prevented in the flange welding process, and the upper/lower wall plate blocks of the test model can be independently disassembled and processed, so that the upper/lower wall surfaces of the inner runner with very high accuracy can be obtained. The device has relatively low technical difficulty in machining and manufacturing, can be used for machining and manufacturing in blocks, has strong operability in the welding process, and saves machining materials and cost.
Description
Technical Field
The invention relates to the field of processing and manufacturing of test models of ramjet engines, in particular to a high-precision test model device of a ramjet engine and a use method thereof.
Background
In the ground test research work of the ramjet engine, in order to improve the combustion performance of the ramjet engine, a plurality of engine test models with different configurations often need to be replaced in the test process. For example, under the low Mach number condition, the total temperature and total pressure are relatively low, and the ignition and flame stabilization of the engine are difficult, so that the configuration of the test model of the ramjet engine needs to be adjusted to be a closed cavity with a relatively small length, and a cavity with a relatively large depth is generally used as a flame stabilization device for carrying out the test; when the Mach number is increased and the total temperature and the total pressure are increased, the ignition performance and the flame stabilizing performance are improved, and the problems of heat protection and the like are required to be considered at the moment, so that the configuration of the test model of the ramjet engine is required to be adjusted to be an open cavity configuration with a relatively large depth, and even the cavity is cancelled to be used as the engine model of the flame stabilizing device for carrying out the test. Therefore, the test models of the ramjet with different configurations need to be frequently replaced in the test process, however, the replacement of the test models of the ramjet is often accompanied by the matching replacement of the air inlet duct and the tail nozzle, and great processing requirements are brought. In conclusion, under the condition of ensuring the processing precision of the test model of the ramjet engine, the processing cost is reduced.
Disclosure of Invention
The invention aims to provide a high-precision ramjet test model device and a use method thereof, so as to solve the problem that the ramjet test model with different configurations needs to be frequently replaced in the test process, however, the replacement of the ramjet test model configuration often accompanies the matched replacement of an air inlet channel and a tail nozzle, and the problem of larger processing requirements is brought.
In order to achieve the above purpose, the present invention provides the following technical solutions:
A high-precision ramjet engine test model device comprises a first part and a second part,
The first part comprises a first inlet limit flange, a first upper wall panel block, a first lower wall panel block and a first outlet limit flange;
four first limit posts are arranged between the upper end heads and the lower end heads of the first upper wall panel block and the first lower wall panel block; the side ends of the first upper wall panel block and the first lower wall panel block are provided with first x-direction positioning nails, and the first x-direction positioning nails are inserted into the side ends of the first upper wall panel block and the first lower wall panel block through first limiting columns, so that the first limiting columns, the first upper wall panel block and the first lower wall panel block are connected, and the relative positions of the first upper wall panel block, the first lower wall panel block and the first upper wall panel block in the x direction are ensured to be fixed; the top surface ends of the first upper wall panel block and the first lower wall panel block are provided with first y-direction positioning nails, and the first y-direction positioning nails are respectively inserted into the upper end surface and the lower end surface of the first limiting column through the top surface ends of the first upper wall panel block and the second lower wall panel block, so that the first limiting column, the first upper wall panel block and the first lower wall panel block are connected, and the relative positions of the first limiting column, the first upper wall panel block and the first lower wall panel block in the y direction are ensured to be fixed; the right-hand side surface of the first inlet limiting flange and the right-hand side surface of the first outlet limiting flange are respectively provided with a square limiting groove, the front end and the rear end of the first upper wall panel block and the front end and the rear end of the first lower wall panel block are respectively provided with a y-direction limiting bolt, the side surface of the first limiting column is provided with a z-direction limiting bolt, and the y-direction limiting bolts and the z-direction limiting bolts are combined and then inserted into the square limiting grooves of the first inlet limiting flange and the first outlet limiting flange;
The second part comprises a second inlet limit flange, a second upper wall panel block, a second lower wall panel block and a second outlet limit flange;
Four second limiting columns are arranged between the upper end heads and the lower end heads of the second upper wall panel block and the second lower wall panel block; a second x-direction positioning pin is arranged at the side end of the second upper wall panel block and the side end of the second lower wall panel block, and is inserted into the side end of the second upper wall panel block and the side end of the second lower wall panel block through a second limiting column, so that the second limiting column, the second upper wall panel block and the second lower wall panel block are connected, and the relative positions of the second upper wall panel block, the second lower wall panel block and the second upper wall panel block in the x direction are ensured to be fixed; the top surface ends of the second upper wall panel block and the second lower wall panel block are provided with second y-direction positioning nails, and the second y-direction positioning nails are respectively inserted into the upper end surface and the lower end surface of the second limiting column through the top surface ends of the second upper wall panel block and the second lower wall panel block, so that the second limiting column, the second upper wall panel block and the second lower wall panel block are connected, and the relative positions of the second upper wall panel block, the second lower wall panel block and the second upper wall panel block in the y direction are ensured to be fixed; a square limit groove is formed in the middle of the second inlet limit flange and the second outlet limit flange, y-direction limit bolts are processed at the front end and the rear end of the second upper wall panel block and the front end and the rear end of the second lower wall panel block, z-direction limit bolts are processed on the side face of the second limit column, and the y-direction limit bolts and the z-direction limit bolts are combined and then inserted into the square limit grooves of the second inlet limit flange and the second outlet limit flange; the first outlet limiting flange is connected with the second inlet limiting flange through bolts.
Preferably, after the y-direction limiting bolt and the z-direction limiting bolt are inserted into the limiting groove of the flange, a wedge-shaped welding seam with the width of 4mm and the depth of 2mm is reserved.
Another object of the present invention is to provide a method for using a high-precision ramjet test model device, comprising the steps of:
a. The method comprises the steps of (1) integrally processing and disassembling a ramjet test model device into four main parts of an inlet limiting flange, an upper wall panel block, a lower wall panel block and an outlet limiting flange, and three secondary parts of a limiting column, an x-direction positioning nail and a y-direction positioning nail;
b. Square limiting grooves are processed on the inlet limiting flange and the outlet limiting flange according to the runner size of an engine test model, y-direction limiting bolts are processed at the front end and the rear end of an upper wall panel block and the lower wall panel block, welding seams are reserved on the y-direction limiting bolts, x-direction positioning nail holes and y-direction positioning nail holes are reserved at the side face end and the top face end respectively, x-direction positioning nail holes and y-direction positioning nail holes are reserved at the side face and the top face of a limiting column respectively, and z-direction limiting bolts are processed at the side face of the limiting column;
c. the y-direction limiting bolt and the z-direction limiting bolt are inserted into a limiting groove of the flange after being combined, and the x-direction positioning nail and the y-direction positioning nail are driven into a reserved positioning nail hole, so that all components are positioned and assembled completely;
d. All the reserved welding seams are welded, and all the pin holes are spot-welded;
e. and (3) milling and flattening redundant weld scars through a milling machine, and carrying out routine operations such as opening a seal groove, drilling a sensor hole, drilling a threaded hole and the like according to requirements.
Compared with the prior art, the invention has the following beneficial effects:
1. The device obtained by the scheme can be disassembled in blocks, so that the large-block materials are integrated into zero, and the material cost of processing and manufacturing is saved;
2. The device obtained by the scheme has simple processing and manufacturing method, and the cutter of the processing center can smoothly reach the inner wall surface of the flow passage of the test model of the ramjet engine, so that the processing means with low precision such as wire cutting or 3D printing are avoided;
3. the device obtained by the scheme is welded after being assembled and positioned, so that the displacement or deformation in the welding process is avoided, the flow channel precision is ensured, the forward/reverse steps are avoided, and a high-precision test model of the ramjet engine can be obtained.
Drawings
FIG. 1 is a schematic structural diagram of a high-precision ramjet test model device according to an embodiment of the present invention;
reference numerals in the drawings of the specification include: 1. a first inlet stop flange; 2. a first upper wall panel block; 3. a first lower wall panel block; 4. y-direction limiting pins; 5. z-direction limiting bolt; 6. a first limit post; 7. a first x-directional locating peg; 8. a first y-directional dowel; 9. a first outlet limit flange; 10. a second inlet limiting flange; 11. a second upper wall panel block; 12. a second lower wall panel block; 13. the second limit column; 14. a second x-directional locating pin; 15. a second y-directional locating peg; 16. and the second outlet limiting flange.
Detailed Description
In the description of the present invention, it should be understood that the terms "center," "entrance," "exit," "end face," "upper," "lower," "front," "rear," "left," "right," "x," "y," "z," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
The invention is further described below with reference to the accompanying drawings:
example 1
As shown in FIG. 1, a high-precision ramjet test model device obtained by processing and manufacturing the method according to the invention has the length, width and height dimensions of 1243mm multiplied by 430mm multiplied by 370mm, the flow channel inlet has the rectangular shape of 180mm multiplied by 40mm, and the outlet has the rectangular shape of 180mm multiplied by 66 mm. The disassembly is as follows: the first inlet limiting flange 1, the first upper wall panel block 2, the first lower wall panel block3, the y-direction limiting bolt 4, the z-direction limiting bolt 5, the first limiting column 6, the first x-direction positioning nail 7, the first y-direction positioning nail 8, the first outlet limiting flange 9, the second inlet limiting flange 10, the second upper wall panel block 11, the second lower wall panel block 12, the second limiting column 13, the second x-direction positioning nail 14, the second y-direction positioning nail 15 and the second outlet limiting flange 16.
Specifically, the high-precision ramjet engine test model device comprises a first part and a second part, wherein the first part comprises a first inlet limiting flange 1, a first upper wall panel block 2, a first lower wall panel block 3 and a first outlet limiting flange 9; the second section comprises a second inlet stop flange 10, a second upper wall panel block 11, a second lower wall panel block 12 and a second outlet stop flange 16.
Four first limit posts 6 are arranged between the upper end and the lower end of the first upper wall panel block 2 and the first lower wall panel block 3; the side ends of the first upper wall panel block 2 and the first lower wall panel block 3 are provided with first x-direction positioning nails 7, and the first x-direction positioning nails 7 are inserted into the side ends of the first upper wall panel block 2 and the first lower wall panel block 3 through first limiting columns 6, so that the first limiting columns 6, the first upper wall panel block 2 and the first lower wall panel block 3 are connected, and the relative positions of the first upper wall panel block 2, the second lower wall panel block 3 in the x direction are ensured to be fixed; the top surface ends of the first upper wall panel block 2 and the first lower wall panel block 3 are provided with first y-direction positioning nails 8, and the first y-direction positioning nails 8 are respectively inserted into the upper end surface and the lower end surface of the first limiting column 6 through the top surface ends of the first upper wall panel block 2 and the second lower wall panel block 12, so that the first limiting column 6, the first upper wall panel block 2 and the first lower wall panel block 3 are connected, and the relative positions of the first upper wall panel block 2 and the second lower wall panel block 3 in the y direction are ensured to be fixed; a square limit groove is formed in the middle of the first inlet limit flange 1 and the first outlet limit flange 9, y-direction limit bolts 4 are processed at the front end and the rear end of the first upper wall panel block 2 and the front end and the rear end of the first lower wall panel block 3, z-direction limit bolts 5 are processed on the side face of the first limit column 6, and the y-direction limit bolts 4 and the z-direction limit bolts 5 are combined and then inserted into the square limit grooves of the first inlet limit flange 1 and the first outlet limit flange 9;
Four second limiting columns 13 are arranged between the upper end and the lower end of the second upper wall panel block 11 and the second lower wall panel block 12; a second x-direction positioning pin 14 is arranged at the side end of the second upper wall panel block 11 and the second lower wall panel block 12, and the second x-direction positioning pin 14 is inserted into the side end of the second upper wall panel block 11 and the second lower wall panel block 12 through a second limit post 13, so that the second limit post 13, the second upper wall panel block 11 and the second lower wall panel block 12 are connected, and the relative positions of the three in the x direction are ensured to be unchanged; the top surface ends of the second upper wall panel block 11 and the second lower wall panel block 12 are provided with second y-direction positioning nails 15, and the second y-direction positioning nails 15 are respectively inserted into the upper end surface and the lower end surface of the second limiting column 13 through the top surface ends of the second upper wall panel block 11 and the second lower wall panel block 12, so that the second limiting column 13, the second upper wall panel block 11 and the second lower wall panel block 12 are connected, and the relative positions of the three in the y direction are ensured to be fixed; a square limit groove is formed in the middle of the second inlet limit flange 10 and the second outlet limit flange 16, y-direction limit bolts 4 are processed at the front end and the rear end of the second upper wall panel block 11 and the second lower wall panel block 12, z-direction limit bolts 5 are processed on the side face of the second limit column 13, and the y-direction limit bolts 4 and the z-direction limit bolts 5 are combined and then inserted into the square limit grooves of the second inlet limit flange 10 and the second outlet limit flange 16; the first outlet limit flange 9 is in bolted connection with the second inlet limit flange 10.
The application method of the high-precision ramjet engine test model device comprises the following steps:
a. The method comprises the steps of (1) integrally processing and disassembling a ramjet test model device into four main parts of an inlet limiting flange, an upper wall panel block, a lower wall panel block and an outlet limiting flange, and three secondary parts of a limiting column, an x-direction positioning nail and a y-direction positioning nail;
b. Square limiting grooves are processed on the inlet limiting flange and the outlet limiting flange according to the runner size of an engine test model, y-direction limiting bolts are processed at the front end and the rear end of an upper wall panel block and the lower wall panel block, welding seams are reserved on the y-direction limiting bolts, x-direction positioning nail holes and y-direction positioning nail holes are reserved at the side face end and the top face end respectively, x-direction positioning nail holes and y-direction positioning nail holes are reserved at the side face and the top face of a limiting column respectively, and z-direction limiting bolts are processed at the side face of the limiting column;
c. the y-direction limiting bolt and the z-direction limiting bolt are inserted into a limiting groove of the flange after being combined, and the x-direction positioning nail and the y-direction positioning nail are driven into a reserved positioning nail hole, so that all components are positioned and assembled completely;
d. All the reserved welding seams are welded, and all the pin holes are spot-welded;
e. and (3) milling and flattening redundant weld scars through a milling machine, and carrying out routine operations such as opening a seal groove, drilling a sensor hole, drilling a threaded hole and the like according to requirements.
The foregoing is merely exemplary of the present application, and specific technical solutions and/or features that are well known in the art have not been described in detail herein. It should be noted that, for those skilled in the art, several variations and modifications can be made without departing from the technical solution of the present application, and these should also be regarded as the protection scope of the present application, which does not affect the effect of the implementation of the present application and the practical applicability of the patent. The protection scope of the present application is subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (3)
1. A high-precision ramjet engine test model device is characterized in that:
comprising a first part and a second part,
The first part comprises a first inlet limit flange (1), a first upper wall panel block (2) and a first lower wall
A panel block (3) and a first outlet limit flange (9);
Four upper and lower ends of the first upper wall panel block (2) and the first lower wall panel block (3) are arranged between
A root first limit column (6); the side surfaces of the first upper wall panel block (2) and the first lower wall panel block (3)
The end is provided with a first X-direction positioning nail (7), and the first X-direction positioning nail (7) passes through a first limit column
(6) Is inserted into the side ends of the first upper wall panel block (2) and the first lower wall panel block (3) so that the first
A limit column (6), a first upper wall panel block (2) and a first lower wall panel block (3) are connected and ensure three
The relative position of the two in the x direction is fixed; the first upper wall panel block (2) and the first lower wall panel
A first y-direction positioning nail (8) is arranged at the top end of the block (3), and the first y-direction positioning nail (8)
The top ends of the first upper wall panel block (2) and the second lower wall panel block (3) are respectively inserted into the first limit part
In the upper and lower end surfaces of the column (6), the first limit column (6), the first upper wall panel block (2) and the first lower wall
The panel blocks (3) are connected, and the relative positions of the three in the y direction are ensured to be fixed; the first inlet
A square limit groove is formed in the middle of the limit flange (1) and the first outlet limit flange (9), and the first upper part is provided with a first upper part
The front end and the rear end of the wall panel block (2) and the first lower wall panel block (3) are both provided with y-direction limiting bolts (4),
The side face of the limiting column is provided with a z-direction limiting bolt (5), and the y-direction limiting bolt (4) and the z-direction limiting bolt are respectively arranged on the side face of the limiting column
The position bolt (5) is inserted into the first inlet limiting flange (1) and the first outlet limiting flange (9) after being combined
Is arranged in the square limit groove;
The second part comprises a second inlet limit flange (10), a second upper wall panel block (11) and a second lower wall surface
A plate (12) and a second outlet stop flange (16);
Four upper and lower ends of the second upper wall panel block (11) and the second lower wall panel block (12) are arranged between
A root second limit post (13); the side ends of the second upper wall panel block (11) and the second lower wall panel block (12)
A second X-direction positioning nail (14) is arranged at the position, and the second X-direction positioning nail (14) passes through a second limit column (13)
Is inserted into the side ends of the second upper wall panel block (11) and the second lower wall panel block (12) to enable the second limit column
(13) The second upper wall panel block (11) is connected with the second lower wall panel block (12), and the relative positions of the second upper wall panel block and the second lower wall panel block in the x direction are ensured to be unchanged; the top surface ends of the second upper wall panel block (11) and the second lower wall panel block (12)
The head is provided with a second y-direction positioning nail (15), and the second y-direction positioning nail (15) passes through the second upper wall panel block
(11) And the top end of the second lower wall plate (12) is respectively inserted into the upper end face and the lower end face of the second limit column (13) to enable
The second limit column (13), the second upper wall panel block (11) and the second lower wall panel block (12) are connected, and three are ensured
The relative position of the two in the y direction is fixed; the second inlet limiting flange (10) and the second outlet limiting flange are used for limiting
A square limit groove is arranged in the middle of the flange (16), and the second upper wall panel block (11) and the second lower wall panel block
(12) The front end and the rear end of the limiting column are respectively provided with a y-direction limiting bolt (4), and the side surface of the limiting column is provided with a z-direction limiting bolt
The bolt (5) is inserted into the second inlet limit after the y-direction limiting bolt (4) and the z-direction limiting bolt (5) are combined
The square limit grooves of the position flange (10) and the second outlet limit flange (16) are formed;
the first outlet limiting flange (9) is connected with the second inlet limiting flange (10) through bolts.
2. The high-precision ramjet engine test model device according to claim 1, characterized in that
In the following steps: after the y-direction limiting bolt (4) and the z-direction limiting bolt (5) are inserted into the limiting groove of the flange in a combined way,
A wedge-shaped welding seam with the width of 4mm and the depth of 2mm is reserved.
3. The method for using the high-precision ramjet engine test model device according to claim 1,
The method is characterized by comprising the following steps of:
a. Disassembling the ramjet test model device into an inlet limiting flange and an upper wall panel from integral processing
Four main parts of block, lower wall plate and outlet limit flange, limit column, x-direction locating nail and y-direction
Positioning three minor portions of the pin;
b. processing the inlet limiting flange and the outlet limiting flange according to the runner size of the engine test model
Square limit grooves for processing y-direction limit pins at front and rear ends of upper wall panel block and lower wall panel block and at y
Reserving welding lines on the limiting bolt, and reserving x-direction positioning nail holes and y-direction positioning nail holes at the side face end head and the top face end head respectively
The lateral surface and the top surface of the limiting column are respectively reserved with an x-direction positioning nail hole and a y-direction positioning nail hole, and the limiting column is limited
The side face of the position column is provided with a z-direction limiting bolt;
c. The y-direction limiting bolt and the z-direction limiting bolt are inserted into a limiting groove of the flange after being combined, and the x-direction is positioned
The nails and the y-direction positioning nails are driven into reserved positioning nail holes, so that all the parts are positioned and assembled completely;
d. All the reserved welding seams are welded, and all the pin holes are spot-welded;
e. milling and leveling redundant weld scars by a milling machine, and subsequently opening a sealing groove and drilling a sensor according to requirements
The hole and the drilling of the threaded hole are performed conventionally.
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| CN103149009A (en) * | 2013-02-22 | 2013-06-12 | 中国人民解放军国防科学技术大学 | Supersonic isolating section wind tunnel test device |
| CN108414231A (en) * | 2018-06-07 | 2018-08-17 | 湖南云顶智能科技有限公司 | Modular trial device for swirl flow combustion thermal acoustic oscillation characteristic research |
| CN111828201A (en) * | 2020-07-15 | 2020-10-27 | 中国空气动力研究与发展中心 | Conveniently-disassembled ground test device for scramjet engine |
| CN112798284A (en) * | 2021-01-06 | 2021-05-14 | 中国人民解放军国防科技大学 | Modularized solid rocket scramjet engine test platform |
| CN114192798A (en) * | 2021-11-29 | 2022-03-18 | 合肥中科重明科技有限公司 | Composite manufacturing method for quick near-net-shape engine combustion chamber |
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