Point type heat flow sensor installation method for wind tunnel aerodynamic heat test

A heat flow sensor, aerothermal technology, applied in aerodynamic tests, instruments, measuring devices, etc., can solve the problems of split vortex, fluctuation of heat flow distribution, local flow field structure and the influence of aerothermal test results, etc. Installation error, the effect of improving the accuracy of measurement data

Active Publication Date: 2021-11-12
中国空气动力研究与发展中心超高速空气动力研究所
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the height of the point-type heat flow sensor is raised/depressed/inclined relative to the surface of the physical test model is small, the disturbance attenuates quickly and will not affect the flow field and test results, but when the point-type heat flow sensor is raised relative to the model surface When the height of /sag/inclination increases to a specific height, the disturbance will be further amplified, and even the phenomenon of split vortex will ap

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
  • Point type heat flow sensor installation method for wind tunnel aerodynamic heat test
  • Point type heat flow sensor installation method for wind tunnel aerodynamic heat test
  • Point type heat flow sensor installation method for wind tunnel aerodynamic heat test

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The physical test model of the present embodiment is a flat plate, and the flow Mach number Ma ∞ =12.0, the flow unit Reynolds number Re ∞ =4.03×10 6 / m, the typical area point is about 0.22m away from the head of the flat model, the diameter is 2mm, the height of the protrusion / depression is 0.05mm and 0.1mm, and the angle of attack is 0°. The obtained local heat flow nephogram is shown in Figure 2a ~ Figure 2d , the obtained aerodynamic heat flow value, aerodynamic heat flow value and h0 value are shown in Table 1.

[0054]

[0055] from Figure 2a ~ Figure 2d It can be seen in the figure that the discontinuity of the plate is caused by the installation of the simulated point heat flow sensor protrusion / depression, so that the local heat flow has a strong discontinuous distribution. It can be seen that there is a significant difference in the B(h) value for different heights of sensor bumps / sags. Taking N=0.05, comparative analysis shows that only when the bum...

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 point type heat flow sensor installation method for a wind tunnel aerodynamic heat test. The method comprises: establishing a numerical test model; calculating a heat flow value q0 of the typical region position point; setting point type heat flow sensor mounting points; setting a mounting height error sequence of the mounting points of the point type heat flow sensor; calculating an aerodynamic heat flow value sequence of the point type heat flow sensor mounting points; calculating a relative deviation sequence of an aerodynamic heat flow value sequence and a heat flow value q0 of a point type heat flow sensor mounting point; calculating the maximum error h0 of the mounting height of the point type heat flow sensor; and checking the height installation error of the point type heat flow sensor of the physical test model, judging whether the installation is qualified or not, and performing rectification until the installation is qualified. The method can reduce the installation error of the point type heat flow sensor, and improves the measurement data precision of a wind tunnel aerodynamic heat test.

Description

technical field [0001] The invention belongs to the technical field of ground wind tunnel test, and in particular relates to a method for installing a point heat flow sensor used for wind tunnel aerodynamic heat test. Background technique [0002] Accurate wind tunnel aerothermal test measurement results not only provide support for aircraft thermal protection design, but also verify various theoretical calculation methods, but there are many factors that affect the wind tunnel aerothermal test measurement results, and the installation error of the heat flow sensor is an important influence one of the factors. [0003] Installing a point-type heat flow sensor on the surface of the physical test model will inevitably damage the surface of the physical test model to a certain extent. Moreover, relative to the surface of the physical test model, there is always a difference in the installation height of the point heat flow sensor, so the surface of the physical test model is a...

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): G01M9/02G01M9/06G06F30/18G06F30/28G06F111/10G06F113/08G06F119/08G06F119/14
CPCG01M9/02G01M9/06G06F30/18G06F30/28G06F2111/10G06F2113/08G06F2119/08G06F2119/14
Inventor 陈挺石义雷赵金山张志刚廖军好粟斯尧肖雨余嘉罗万清王勇
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