Compressible Reynolds stress measurement system based on composite schlieren technology

A technology of Reynolds stress and measurement system, applied in the direction of measuring devices, measuring rapid changes, testing of machines/structural components, etc., can solve problems such as speed or density single data, and achieve the effect of time and space unity

Active Publication Date: 2022-01-07
INST OF HIGH SPEED AERODYNAMICS OF CHINA AERODYNAMICS RES & DEV CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These techniques can only get a single data of velocity or density

Method used

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  • Compressible Reynolds stress measurement system based on composite schlieren technology
  • Compressible Reynolds stress measurement system based on composite schlieren technology
  • Compressible Reynolds stress measurement system based on composite schlieren technology

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Embodiment Construction

[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0037] like figure 1 As shown, the compressible Reynolds stress measurement system based on the compound schlieren technology of this embodiment includes a light source subsystem 1, a first main reflector 2, and a second main reflector arranged in sequence according to the order of light from emission to reception 3. Imaging subsystem 4 , the connecting line of light source subsystem 1 , first main reflector 2 , second main reflector 3 , and imaging subsystem 4 is zigzag, and imaging subsystem 4 includes a quadrangular pyramid ed...

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Abstract

The invention belongs to the technical field of Reynolds stress measurement systems, and particularly relates to a compressible Reynolds stress measurement system based on a composite schlieren technology. According to the technical scheme, the compressible Reynolds stress measurement system based on the composite schlieren technology comprises a light source subsystem, a first main reflecting mirror, a second main reflecting mirror and an imaging subsystem which are sequentially arranged according to the sequence from light emission to light receiving, and the connecting line of the light source subsystem, the first main reflecting mirror, the second main reflecting mirror and the imaging subsystem is in a Z shape, The imaging subsystem comprises a rectangular pyramid knife edge. The invention provides the compressible Reynolds stress measurement system based on the composite schlieren technology.

Description

technical field [0001] The invention belongs to the technical field of Reynolds stress measurement systems, in particular to a compressible Reynolds stress measurement system based on composite schlieren technology. Background technique [0002] The stress generated when the fluid moves in turbulent flow, in addition to the viscous stress, there are additional stresses, including normal additional stress and tangential additional stress. These additional stresses are unique to turbulent flow and are generated by the pulsation of fluid particles. , called the Reynolds stress. Reynolds stress is a tensor with the following form, including normal stress and shear stress; [0003] (3D); [0004] (two-dimensional). [0005] When solving the fluid Navier-Stokes equations, the Reynolds stress needs to be modeled in order to close the system of equations. But modeling or simulating Reynolds stress is not a simple matter. Because the flow is very complex, under different con...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M9/06G01L23/00
CPCG01M9/06G01L23/00
Inventor 陈植黄振新何威彭昊冯黎明何彬华李国帅李永红张兆夏洪亚胥继斌张鑫吴灿
Owner INST OF HIGH SPEED AERODYNAMICS OF CHINA AERODYNAMICS RES & DEV CENT
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