CN110726560A - Two-degree-of-freedom adjustable air inlet channel throat adjusting test device - Google Patents
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- CN110726560A CN110726560A CN201911089007.4A CN201911089007A CN110726560A CN 110726560 A CN110726560 A CN 110726560A CN 201911089007 A CN201911089007 A CN 201911089007A CN 110726560 A CN110726560 A CN 110726560A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
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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
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
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- Combustion & Propulsion (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention relates to a two-degree-of-freedom adjustable air inlet channel throat adjusting test device, and belongs to the technical field of engines. The adjustable compression surface structure adopts a replaceable design, and different design states of the adjustable flow passage compression surface are realized through the angle characteristic of the compression surface; the throat adjusting module adopts an integral design, can be independently assembled and disassembled, realizes the adjustment of the throat surface through a movement mechanism, and has the advantages of the traditional fixed profile and adjustable profile scheme; the adjustable compression surface and the throat are adjusted in a modular design, the interface of the adjustable compression surface and the whole flow channel fixing structure is clear, local scheme change is facilitated, series design is facilitated, universality is strong, and the adjustable compression surface and the throat can be used as a test verification platform for series schemes of adjustable air inlet channels.
Description
Technical Field
The invention belongs to the technical field of engines, and particularly relates to a two-degree-of-freedom adjustable air inlet channel throat adjustment test device.
Background
The air inlet channel is one of key components of the ramjet engine, and the main function of the air inlet channel is to capture high Mach flow and boost the flow to be supplied to a combustion chamber. The design and operating characteristics of the air scoop significantly affect the overall performance of the entire propulsion system and hence the aircraft. To ensure good engine performance over a wide speed range, the inlet duct design must be adjustable to ensure that the desired aerodynamic design conditions are achieved at the critical several flight mach number design point(s). The variable-geometry adjustable air inlet is the most widely researched adjustable air inlet at present, generally comprises a compression surface adjusting part and a throat adjusting part, and meets the requirements of several (multiple) flight Mach number design points through adjusting the angle of the compression surface and the size of the throat.
The air inlet duct adjusting test device is a structural device for carrying out air inlet duct wind tunnel test verification on the aerodynamic performance of a variable-geometry adjustable air inlet duct typical design point. For variable geometry adjustable air inlets, the test device generally comprises a fixed profile and an adjustable profile. The fixed profile test device is characterized in that the runner profiles of the adjustable air inlet channel at different design points are respectively made into a runner structure, and the fixed profile test device has the advantages that a single test device is simple in structure, stable and reliable, and the defect that how many wind tunnel test models need to be processed in how many adjusting states. The adjustable profile test device meets the requirement of adjusting motion of the adjustable air inlet channel through structural design and mechanism design, has the advantages that only one set of structural model needs to be processed, real-time adjustment of the air inlet channel can be realized, and the adjustable profile test device has the defects of complex structure and mechanism design and relatively poor reliability. Therefore, the fixed profile air inlet test device is limited to the structural characteristics of the fixed profile air inlet test device when used for carrying out design verification on an adjustable air inlet, and has the defects of single design point, incapability of verifying dynamic characteristics and the like.
The Chinese patent with the publication number of CN108412619A discloses a multi-degree-of-freedom single-variable control combined power adjustable air inlet channel, the adjustment mode of the adjustable air inlet channel has strong pertinence, the adjustment structure and the mechanism are specially designed, and the adjustment scheme needs to be completely redesigned after being slightly changed and cannot be used as a serial universal platform.
Disclosure of Invention
Technical problem to be solved
The technical problem to be solved by the invention is as follows: how to design an adjustable air inlet passage throat adjusting test device with simple and reliable structure and strong universality.
(II) technical scheme
In order to solve the technical problem, the invention provides a two-degree-of-freedom adjustable air inlet channel throat adjusting test device which comprises an air inlet channel structure main body 1, an adjustable compression surface structure 2 and a throat adjusting module 3, wherein the adjustable compression surface structure 2 is connected with the air inlet channel structure main body 1 through a channel structure, the adjustable compression surface structure 2 can be embedded into a corresponding channel on the air inlet channel structure main body 1 from the side surface, and after a side wall plate is covered on the side surface of the air inlet channel structure main body 1, the adjustable compression surface structure 2 is completely fixed on the air inlet channel structure main body 1; the adjustable compression surface structure 2 is arranged on the air inlet channel structure main body 1, is a replaceable module which can be quickly plugged and pulled, and realizes the change of the compression surface state through a replacement structure; the throat adjusting module 3 is arranged on the air inlet passage structure main body 1, is an independent throat surface adjusting module and can realize the motion adjustment of a throat adjusting plate under the pushing of an actuating mechanism; the throat adjusting module 3 is fixedly connected with the air inlet passage structural main body 1 through bolts, and then the adjustable molded surface can be connected with the rear runner molded surface of the air inlet passage structural main body 1.
Preferably, the air inlet passage structure further comprises a side wall plate, and after the adjustable compression surface structure 2 and the throat adjusting module 3 are mounted on the air inlet passage structure main body 1, the side surface of the air inlet passage structure main body 1 is covered with the side wall plate, so that an air inlet passage channel with a complete wall surface can be formed.
Preferably, the air inlet passage structural body 1 comprises a throat adjusting module support 12, which is provided with a compression surface channel 11 and a fixed runner molded surface 13, and a throat adjusting module mounting hole 14 is formed in the throat adjusting module support 12; the compression surface channel 11 is provided with a matching surface with the adjustable compression surface structure 2, and the throat adjusting module support 12 and a throat adjusting module mounting hole 14 on the support are used for realizing the assembling, positioning and fastening of the throat adjusting module 3.
Preferably, the adjustable compression surface structure 2 has a compression surface 21, the adjustable compression surface structure 2 is a replaceable structure, and the compression surfaces 21 with different angle characteristics are used for realizing different design states of the adjustable flow passage compression surface.
Preferably, a rectangular groove 22 is further formed in the adjustable compression surface structure 2, so that the adjustable compression surface structure 2 can be assembled in a plugging and pulling manner.
Preferably, the throat adjusting module 3 includes an adjusting link 33, a driving link 34, an adjusting bracket 35, a sliding table 36 and a connecting shaft pin, and has a throat adjusting surface 31 and a linkage adjusting surface 32, and the driving link 34 is connected with the linkage adjusting surface 32 through a pin; the slide table 36 includes an actuator, and the slide table 36 is used to provide a horizontal linear driving force in the throat adjustment module 3; the throat adjusting surface 31, the adjusting connecting rod 33, the adjusting bracket 35 and the linkage adjusting surface 32 are assembled and connected through the pin shaft in sequence to form a parallelogram structure, and the sliding block of the actuator can drive the driving connecting rod 34 to drive the linkage adjusting surface 32 to rotate when moving horizontally, so that the translation of the throat adjusting surface 31 is realized.
Preferably, an auxiliary notch is left on the compression surface channel 11 for installing the adjustable compression surface structure 2.
Preferably, the actuator further comprises a motor.
Preferably, the actuator further comprises a lead screw.
(III) advantageous effects
The adjustable compression surface structure adopts a replaceable design, and different design states of the adjustable flow passage compression surface are realized through the angle characteristic of the compression surface; the throat adjusting module adopts an integral design, can be independently assembled and disassembled, realizes the adjustment of the throat surface through a movement mechanism, and has the advantages of the traditional fixed profile and adjustable profile scheme; the adjustable compression surface and the throat are adjusted in a modular design, the interface of the adjustable compression surface and the whole flow channel fixing structure is clear, local scheme change is facilitated, series design is facilitated, universality is strong, and the adjustable compression surface and the throat can be used as a test verification platform for series schemes of adjustable air inlet channels.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural diagram of the inlet structural body of the present invention;
FIG. 3 is a structural cross-sectional view of an adjustable compression surface configuration of the present invention;
figure 4 is a schematic structural view of a throat adjustment module of the present invention.
Detailed Description
In order to make the objects, contents, and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
As shown in fig. 1, the adjustable inlet throat adjustment test device provided by the invention comprises an inlet structural main body 1, an adjustable compression surface structure 2, a throat adjustment module 3, a side wall plate and a connecting piece thereof, wherein the adjustable compression surface structure 2 is connected with the inlet structural main body 1 through a channel structure, the adjustable compression surface structure 2 can be embedded into a corresponding channel on the inlet structural main body 1 from the side, and after the side wall plate is covered on the side surface of the inlet structural main body 1, the adjustable compression surface structure 2 is completely fixed on the inlet structural main body 1; the adjustable compression surface structure 2 is arranged on the air inlet channel structure main body 1, is a replaceable module which can be quickly plugged and pulled, and realizes the change of the compression surface state through a replacement structure; the throat adjusting module 3 is arranged on the air inlet passage structure main body 1, is an independent throat surface adjusting module and can realize the motion adjustment of a throat adjusting plate under the pushing of an actuating mechanism; after the throat adjusting module 3 is fixedly connected with the air inlet passage structural main body 1 through bolts, the connection between the adjustable molded surface and the molded surface of the rear runner of the air inlet passage structural main body 1 can be realized; after the adjustable compression surface structure 2 and the throat adjusting module 3 are installed on the air inlet passage structural main body 1, the side wall plate is covered on the side surface of the air inlet passage structural main body 1, and an air inlet passage channel with a complete wall surface can be formed.
The structural schematic of the air inlet passage structural body 1 is shown in fig. 2, and comprises a throat adjusting module support 12, a compression surface channel 11 and a fixed runner molded surface 13, wherein a throat adjusting module mounting hole 14 is formed in the throat adjusting module support 12; the compression surface channel 11 comprises an auxiliary notch which is arranged outside a matching surface of the adjustable compression surface structure 2 and is used for quickly installing the adjustable compression surface structure 2, and the throat adjusting module support 12 and a throat adjusting module installing hole 14 on the throat adjusting module support are used for realizing the assembling positioning and fastening of the throat adjusting module 3.
The structural section view of the adjustable compression surface structure 2 is shown in fig. 3, and the adjustable compression surface structure 2 is a replaceable structure, and the compression surfaces 21 with different angle characteristics are used for realizing different design states of the adjustable flow passage compression surface. The rectangular recess 22 is designed to enable a quick plug-in assembly of the adjustable compression face structure 2.
The throat adjusting module 3 is schematically shown in fig. 4, and includes an adjusting link 33, a driving link 34, an adjusting bracket 35, a sliding table 36 and a connecting shaft pin, and has a throat adjusting surface 31 and a linkage adjusting surface 32, and the driving link 34 is connected with the linkage adjusting surface 32 through a pin; the sliding table 36 comprises an actuator consisting of a motor, a lead screw and a sliding block, and the sliding table 36 is used for providing horizontal linear driving force in the throat adjusting module 3; the throat adjusting surface 31, the adjusting connecting rod 33, the adjusting bracket 35 and the linkage adjusting surface 32 are assembled and connected through the pin shaft in sequence to form a parallelogram structure, and the sliding block of the sliding table 36 can drive the driving connecting rod 34 to drive the linkage adjusting surface 32 to rotate when moving horizontally, so that the throat adjusting surface 31 can translate, and the purpose of adjusting the size of the throat of the air inlet channel is achieved.
The working principle of the two-degree-of-freedom adjustable air inlet passage throat adjusting test device is that after the two-degree-of-freedom adjustable air inlet passage throat adjusting test device is assembled and implemented according to the figure 1, the adjustment of the state of a compression surface of an air inlet passage can be realized by replacing an adjustable compression surface structure 2, the horizontal movement of a sliding table 36 can realize the translation of a throat adjusting surface 31 on a vertical plane after being transmitted by a driving connecting rod 34, and the throat adjusting test device is matched with a corresponding fixed profile of an air inlet passage structure main body 1 to realize the adjustment. The adjustable compression surface is characterized in that the adjustable compression surface adopts a replaceable design, and the structure is simple and reliable; the throat adjusting module 3 adopts an integral design, can be independently disassembled and assembled, and is easy to assemble and maintain; the adjustable compression surface and the throat are adjusted in a modular design, the interface with the whole flow channel fixing structure is clear, local scheme change is convenient to carry out, and the universality is high.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (9)
1. The two-degree-of-freedom adjustable air inlet channel throat adjusting test device is characterized by comprising an air inlet channel structure main body (1), an adjustable compression surface structure (2) and a throat adjusting module (3), wherein the adjustable compression surface structure (2) is connected with the air inlet channel structure main body (1) through a channel structure, the adjustable compression surface structure (2) can be embedded into a corresponding channel on the air inlet channel structure main body (1) from the side surface, and after a side wall plate is covered on the side surface of the air inlet channel structure main body (1), the adjustable compression surface structure (2) is completely fixed on the air inlet channel structure main body (1); the adjustable compression surface structure (2) is arranged on the air inlet channel structure main body (1), is a replaceable module capable of being quickly plugged and pulled, and realizes the change of the compression surface state through the replacement structure; the throat adjusting module (3) is arranged on the air inlet passage structure main body (1), is an independent throat surface adjusting module and can realize the motion adjustment of the throat adjusting plate under the pushing of the actuating mechanism; the throat adjusting module (3) is fixedly connected with the air inlet channel structure main body (1) through bolts, and then the adjustable molded surface can be connected with the rear runner molded surface of the air inlet channel structure main body (1).
2. The device of claim 1, further comprising a side wall plate, wherein after the adjustable compression surface structure (2) and the throat adjusting module (3) are mounted on the inlet structure body (1), the side wall plate is covered on the side surface of the inlet structure body (1) to form an inlet channel with a complete wall surface.
3. The device according to claim 1, characterized in that the air inlet structure body (1) comprises a throat adjusting module support (12) which is provided with a compression surface channel (11) and a fixed runner profile (13), the throat adjusting module support (12) is provided with a throat adjusting module mounting hole (14), the compression surface channel (11) is provided with a matching surface with the adjustable compression surface structure (2), and the throat adjusting module support (12) and the throat adjusting module mounting hole (14) thereon are used for realizing the assembling positioning and fastening of the throat adjusting module (3).
4. The device according to claim 1, characterized in that the adjustable compression surface structure (2) has a compression surface (21), the adjustable compression surface structure (2) being a replaceable structure, the compression surfaces (21) having different angular characteristics being used to achieve different design conditions of the adjustable flow path compression surface.
5. The device according to claim 1, characterized in that the adjustable compression surface structure (2) is further provided with a rectangular groove (22) for plug-in assembly of the adjustable compression surface structure (2).
6. The device according to claim 1, characterized in that the throat adjusting module (3) comprises an adjusting connecting rod (33), a driving connecting rod (34), an adjusting bracket (35), a sliding table (36) and a connecting shaft pin, and is provided with a throat adjusting surface (31) and a linkage adjusting surface (32), wherein the driving connecting rod (34) is connected with the linkage adjusting surface (32) through the pin shaft; the sliding table (36) comprises an actuator, and the sliding table (36) is used for providing horizontal linear driving force in the throat adjusting module (3); the throat adjusting surface (31), the adjusting connecting rod (33), the adjusting bracket (35) and the linkage adjusting surface (32) are assembled and connected through the pin shaft to form a parallelogram structure, and a sliding block of the actuator can drive the driving connecting rod (34) to drive the linkage adjusting surface (32) to rotate when moving horizontally, so that the throat adjusting surface (31) translates.
7. The device according to claim 1, characterized in that the compression surface channel (11) is provided with additional recesses for the mounting of the adjustable compression surface structure (2).
8. The device of claim 6, wherein the actuator further comprises a motor.
9. The device of claim 8, wherein the actuator further comprises a lead screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911089007.4A CN110726560A (en) | 2019-11-08 | 2019-11-08 | Two-degree-of-freedom adjustable air inlet channel throat adjusting test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911089007.4A CN110726560A (en) | 2019-11-08 | 2019-11-08 | Two-degree-of-freedom adjustable air inlet channel throat adjusting test device |
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| CN110726560A true CN110726560A (en) | 2020-01-24 |
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| CN201911089007.4A Pending CN110726560A (en) | 2019-11-08 | 2019-11-08 | Two-degree-of-freedom adjustable air inlet channel throat adjusting test device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112665814A (en) * | 2020-12-15 | 2021-04-16 | 中国人民解放军国防科技大学 | Fluid generation system with adjustable speed profile |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112665814A (en) * | 2020-12-15 | 2021-04-16 | 中国人民解放军国防科技大学 | Fluid generation system with adjustable speed profile |
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