Transient jet flow test method for pulse wind tunnel

A test method and jet flow technology, applied in the field of hypersonic pulsed wind tunnel test equipment, can solve problems such as thermal environment prediction and heat protection design difficulties, local high heat flow, and complex thermal environment in the interference area, etc., to achieve a fast jet flow system preparation, saving time and cost, effect of accurate parameters

Active Publication Date: 2022-03-11
中国空气动力研究与发展中心超高速空气动力研究所
View PDF8 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, during hypersonic flight, the RCS jet flow and the flow around the aircraft interfere with each other, and the thermal environment in the i

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Transient jet flow test method for pulse wind tunnel
  • Transient jet flow test method for pulse wind tunnel
  • Transient jet flow test method for pulse wind tunnel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] In this embodiment, the gas cylinders supplied by the gas source are 4 bottles of 13MPa, 40L bottled nitrogen, and 2 bottles of 13MPa, 40L bottled helium; the gas cylinders are connected to the gas storage pipe 1 through a stainless steel high-pressure pipe, and an integrated control is set between the two Each gas cylinder is equipped with a pressure reducing valve, and the connecting pipeline between the gas cylinders is equipped with a safety pressure relief valve. At the same time, a bottle of high-pressure gas is used alone in the gas cylinder group to provide a pilot gas source for the fast solenoid valve 3 .

[0101] The gas storage pipe 1 is made of 304 stainless steel, with an inner diameter of 90 mm and a length of 10 m. The stable gas supply time is about 60 ms when using nitrogen gas. The air pipe 2 is connected; the other end of the small-diameter air pipe 2 is connected to the fast solenoid valve 3 . The fast electromagnetic valve 3 is connected with the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a transient jet flow test method for a pulse wind tunnel. The transient jet flow test method comprises the following steps: firstly, determining a Laval nozzle Mach number of a jet flow test model and pulse wind tunnel mainstream duration according to pulse wind tunnel transient jet flow test requirements; then designing and processing a gas storage pipe; installing a jet flow test model, and debugging each system; measuring nozzle outlet airflow parameters; and finally, carrying out a pulse wind tunnel transient jet flow test. By using the transient jet flow test method, the stable jet flow formation time of the jet flow test model is synchronous with the wind tunnel mainstream, the duration time exceeds the effective test time of the wind tunnel mainstream, and the jet flow test model can be automatically closed after the set jet flow duration; the device can simulate a complex flow field structure formed by mutual interference between transverse jet flow formed when a reaction control system of an aircraft works and external streaming of the aircraft, and is particularly suitable for simulating an aerodynamic thermal environment on the surface of the aircraft with the transverse jet flow and evaluating the influence of jet flow interference on aerodynamic characteristics of the aircraft.

Description

technical field [0001] The invention belongs to the field of hypersonic pulse wind tunnel test equipment, and in particular relates to a transient jet flow test method used in a pulse wind tunnel. Background technique [0002] Lateral jet control is a control method to control the attitude of the aircraft or provide direct maneuvering force by means of the jet reaction force and the disturbance force generated by the interaction between the jet and the incoming flow. Compared with the traditional aerodynamic rudder control, the lateral jet control is applicable to the full speed range and the whole airspace, and has the remarkable characteristics of fast response and high efficiency, which is conducive to reducing the aerodynamic control surface, weight and drag of the aircraft. Non-lift re-entry vehicles (such as spacecraft return capsule), lift-type re-entry vehicles (such as space shuttle, X-37B, X-38, HTV-2, etc.) and high-speed interceptor missiles (such as PAC-3, THAAD...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01M9/02G01M9/04G01M9/06
CPCG01M9/02G01M9/04G01M9/065Y02T90/00
Inventor 龚红明张宏安张扣立孔小平
Owner 中国空气动力研究与发展中心超高速空气动力研究所
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap