Mach number adjusting mechanism suitable for trans-supersonic wind tunnel

A technology of adjusting mechanism and Mach number, which is applied in the field of aerodynamic wind tunnel test, can solve the problems of poor aerodynamic performance, the adjustment sheet cannot be smoothly retracted, and the Mach number measurement blockage degree is large, so as to achieve good aerodynamic performance and blockage degree. small effect

Active Publication Date: 2017-03-22
AVIC SHENYANG AERODYNAMICS RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the second throat central body mechanism of the existing transsupersonic wind tunnel adopts a two-piece structure, because the adjustment piece cannot be smoothly retracted and flattened, resulting in a large Mach number measurement blockage and poor aerodynamic performance problem, and then provide a Mach number adjustment mechanism suitable for transonic wind tunnel

Method used

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  • Mach number adjusting mechanism suitable for trans-supersonic wind tunnel
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  • Mach number adjusting mechanism suitable for trans-supersonic wind tunnel

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specific Embodiment approach 1

[0015] Specific implementation mode one: combine Figure 1 to Figure 3 Describe this embodiment, a Mach number adjustment mechanism suitable for a transsupersonic wind tunnel in this embodiment includes a main electric cylinder 1, an auxiliary adjustment mechanism 2, a main electric cylinder mounting seat 3, a joint bearing 5, a connecting seat 6, and a slide rail Slider 7, slide rail mounting seat 8, front tail extension plate 9, diamond-shaped adjustment piece 10 and rear tail extension plate 11, the front tail extension plate 9 and rear tail extension plate 11 are installed on the upper wall plate 13 of the second throat In the cavity formed by the lower wall plate 14 of the second throat, a diamond-shaped regulating piece 10 is hinged between the front tail extension plate 9 and the rear tail extension plate 11, and the diamond-shaped frame of the diamond-shaped regulating piece 10 is provided with an auxiliary adjustment mechanism 2 , the front tail extension plate 9 is f...

specific Embodiment approach 2

[0016] Specific implementation mode two: combination Figure 1 to Figure 3 Describe this embodiment, the diamond-shaped adjusting piece 10 described in a Mach number adjustment mechanism suitable for a trans-supersonic wind tunnel in this embodiment includes a first adjusting piece 16, a second adjusting piece 17, a third adjusting piece 18 and a fourth adjusting piece The adjustment piece 19, the first adjustment piece 16 and the second adjustment piece 17 are connected with the front tail extension plate 9 through a hinged manner, and the third adjustment piece 18 and the fourth adjustment piece 19 are connected with the rear tail extension plate through a hinged manner. The extension plate 11 establishes a connection, the first adjusting piece 16 is hinged with the third adjusting piece 18, the second adjusting piece 17 is hinged with the fourth adjusting piece 19, and the first adjusting piece 16 and the second adjusting piece 16 after the hinge connection are hinged. The ...

specific Embodiment approach 3

[0017] Specific implementation mode three: combination Figure 1 to Figure 3 Describe this embodiment, a Mach number adjustment mechanism suitable for transsupersonic wind tunnels according to this embodiment. The auxiliary adjustment mechanism 2 includes an auxiliary electric cylinder 15, an auxiliary electric cylinder mounting seat 4 and a push rod 12. The push rod The rod 12 is set in the frame formed by the diamond-shaped adjusting piece 10, and the push rod 12 completes the pushing action through the auxiliary electric cylinder 15 installed on the auxiliary electric cylinder mounting seat 4, and the auxiliary electric cylinder mounting seat 4 is fixedly installed on the second throat On the outer wall of the wall plate 13 and the lower wall plate 14 of the second throat. In this way, driven by the auxiliary electric cylinder 15, the diamond-shaped regulating piece 10 in the folded and flat state can be opened to a small angle to break the dead center position of the mecha...

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Abstract

A Mach number adjusting mechanism suitable for a trans-supersonic wind tunnel belongs to the technical field of aviation aerodynamic force wind tunnel test, and aims at solving the problem that a present Mach number adjusting mechanism is high in the adjusting obstruction degree of an air flow cross section. The adjusting mechanism comprises a front tail plate, a rhombic adjusting sheet and a rear tail plate, the front tail plate and the rear tail plate are mounted in a cavity formed by an upper double-throat wallboard and a lower double-throat wallboard, the rhombic adjusting sheet is hinged between the front tail plate and the rear tail plate, an auxiliary adjusting mechanism is arranged in a rhombic frame of the rhombic adjusting sheet, a main electric cylinder drives the rear tail plate to slide in a slide rail soleplate, and the rear tail plate is pulled to adjust opening and closing of the rhombic adjusting sheet. The Mach number adjusting mechanism uses the rhombic adjusting sheet, the rhombic adjusting sheet is continuous with and has no order difference from an air flow profile formed by the front and rear tail plates, and can be folded completely, the mechanism is low in obstruction degree, and a pneumatic performance is high.

Description

technical field [0001] The invention relates to a Mach number adjustment mechanism suitable for a transsupersonic wind tunnel, and belongs to the technical field of aviation aerodynamic wind tunnel tests. Background technique [0002] Aerodynamics is a basic science for the development of aerospace technology and other industrial technologies, and wind tunnel experiment is one of the basic methods of aerodynamics research. In sub-, trans-, and supersonic wind tunnel experiments, the Mach number is one of the important aerodynamic parameters that need to be accurately simulated. In transsonic wind tunnels, there are many ways to control the experimental Mach number. Using the center body type second throat to control the experimental Mach number is widely used because of its fast response speed and high adjustment accuracy. Some of the second throat central body mechanisms of the existing transsupersonic wind tunnel adopt a two-piece structure, the airflow profile is discont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M9/04
CPCG01M9/04
Inventor 刘中臣王颖袁野邢汉奇张刃孟凡民
Owner AVIC SHENYANG AERODYNAMICS RES INST
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