Method for designing ultrasonic-speed turning flow channel

A supersonic flow and design method technology, applied in the direction of mechanical equipment, fluid flow, etc., can solve the problems of shock wave generation, uncontrollable internal flow field parameters, no supersonic speed and no shock wave turning channel, etc., and achieve the goal of improving the quality of the flow field Effect

Active Publication Date: 2013-03-27
NAT UNIV OF DEFENSE TECH
View PDF3 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In this method, the subsonic region must be designed, and it is generally a two-dimensional or axisymmetric structure. If the flow needs to turn, there will be concentrated expansion and compression waves. If the curvature is too large, shock wav

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
  • Method for designing ultrasonic-speed turning flow channel
  • Method for designing ultrasonic-speed turning flow channel
  • Method for designing ultrasonic-speed turning flow channel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] According to an embodiment of the present invention, a supersonic turning channel is obtained by the following method.

[0036] like figure 1 As shown, first, according to the structural design requirements of the supersonic turning channel, that is, the geometric constraints of the outlet flow field parameters, the inlet boundary AB of the supersonic channel wall curve is determined, where A is the second inlet boundary point of the inlet boundary AB, and B is the inlet boundary AB The first entry boundary point of . Then according to the coordinates of the second inlet boundary point A and the first inlet boundary point B of the inlet boundary AB, the Mach number and the flow direction angle, the coordinates of the vertex C of the inlet influence domain and the Mach number and sum of the vertex C are determined by the method of characteristic lines flow direction angle. Then, according to the coordinates, Mach number and flow direction angle of each point between th...

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 provides a method for designing an ultrasonic-speed turning flow channel. The method comprises the following steps of: determining the inlet boundary of the wall surface curve of the ultrasonic-speed flow channel according to the geometric constraint of the design structure of the ultrasonic-speed flow channel; determining the one-sided wall surface curve of the ultrasonic-speed flow channel according to the geometric constraint of the design structure of the ultrasonic-speed flow channel; determining the opposite-side wall surface curve which corresponds to the one-sided wall surface curve by adopting the method of characteristics; and determining the wall surface curve of the ultrasonic-speed flow channel according to the parameters of an outlet flow field. Due to the adoption of the method, the shock-free ultrasonic-speed flow channel of the whole flow field can be obtained, and a better flow field environment can be provided for the aerodynamic and structural design of an ultrasonic-speed wind tunnel, an ultrasonic-speed ejector and an ultrasonic-speed aircraft.

Description

technical field [0001] The invention relates to the field of aerodynamic design, in particular to a method for designing a supersonic turning channel. Background technique [0002] The change of supersonic flow direction is bound to be accompanied by Mach wave radiation. If the supersonic flow channel turns suddenly or the curvature of the turn is too large, there will be an obvious shock wave structure. The shock wave structure will not only bring the total pressure loss of the flow, but also interact with the wall boundary layer. The effect forms a complex separation zone structure, which greatly deteriorates the aerodynamic performance of the supersonic flow channel. [0003] The document "Gas Dynamics" (Tong Binggang, Higher Education Press, 1989) discloses a supersonic nozzle design method, the steps are as follows: [0004] 1. According to the requirements of shrinkage ratio and length-to-diameter ratio, design the subsonic section curve; [0005] 2. Determine the su...

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): F15D1/02
Inventor 赵玉新王振国赵延辉梁剑寒范晓樯马志成
Owner NAT UNIV OF DEFENSE TECH
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