Sprayer nozzle used for tail jet flow interference test

A technology of tail nozzle and tail jet flow, which is applied in the direction of aerodynamic test, machine/structural component test, measuring device, etc. The problem of increasing the size of the boom can be solved, and the effect of meeting the requirements of the wind tunnel test, avoiding potential safety hazards, and reducing the degree of blockage can be achieved.

Active Publication Date: 2015-07-29
CHINA ACAD OF AEROSPACE AERODYNAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the tail jet test, the support method can only be abdominal support or back support. Since the size of the tail nozzle is generally large, a large-diameter high-pressure gas supply pipeline is required to form a supersonic jet.
H

Method used

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  • Sprayer nozzle used for tail jet flow interference test
  • Sprayer nozzle used for tail jet flow interference test

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Experimental program
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Embodiment Construction

[0017] The present invention will be further introduced below in conjunction with the accompanying drawings.

[0018] Such as figure 1 with figure 2 As shown, the experimental device used to simulate the flow disturbance at the bottom of the missile includes a central cone 1, a prototype tail nozzle 2, a plenum chamber 3, a high-pressure gas supply pipeline 4, a tail rudder 5, an arm 6, and a wind tunnel bracket Connector 7.

[0019] The plenum 3 is provided inside the missile model, the prototype tail nozzle 2 is connected with the plenum 3 , and the high-pressure air supply pipeline 4 is an adjustable small-diameter pipeline, which communicates with the plenum 3 .

[0020] Such as figure 2 As shown, the annular exhaust nozzle is formed by disposing the central cone 1 in the prototype exhaust nozzle 2 . In this embodiment, the central cone 1 includes a cone part, a cylinder part and a central connecting rod, the above-mentioned cone part is arranged in the expansion sec...

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Abstract

The invention discloses a sprayer nozzle used for a tail jet flow interference test. The sprayer nozzle used for the tail jet flow interference test comprises a tail jet flow central cone and a conventional tail sprayer nozzle, wherein the conventional tail sprayer nozzle is connected with a pressure stabilization chamber arranged in an experimental model; the pressure stabilization chamber is communicated with a high-pressure air supply pipeline; the central cone of a tail sprayer nozzle is arranged in the conventional tail sprayer nozzle to form an annular tail sprayer nozzle. According to the sprayer nozzle, the high-pressure air supply pipeline with a small caliber can meet the test requirement of big-caliber tail jet flow so as to avoid the problems that wind tunnel blockage is enlarged since the size of a support arm is enlarged by a big-caliber high-pressure pipeline, interference on model aerodynamic force is increased by back support and the like. A 1.2m-magnitude wind tunnel can be used for carrying out the tail jet flow interference test, and therefore, the precise simulation of the Mach number and the blowdown ratio (Pj/P infinity) of big-caliber sprayer nozzle jet flow can be finished under a small-caliber high-pressure air supply pipeline.

Description

technical field [0001] The invention relates to a nozzle used for a tail jet interference test and belongs to the field of experimental aerodynamics. Background technique [0002] With the rapid development of military science and technology, the wake jet disturbance test technology has a wide and urgent demand in the wind tunnel test of aircraft. When some missiles are flying in the active section, the high-temperature and high-speed gas jet from the engine tail nozzle strongly interferes with the outflow, and a flow with complex structures such as boundary layer separation, backflow, shock wave interference and free flow shear will be formed at the bottom of the missile. The field affects the aerodynamic characteristics of the missile bottom and tail rudder, and then affects the aerodynamic characteristics and flight performance of the missile. [0003] The jet flow test mostly measures the disturbance of the jet flow through the dynamometer test, so the jet flow dynamome...

Claims

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Application Information

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IPC IPC(8): G01M9/00
Inventor 潘晓军吴军飞闫卫锋欧平张江
Owner CHINA ACAD OF AEROSPACE AERODYNAMICS
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