Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A Particle Image Velocimetry Method and Device Based on Dispersion-Free Smoothing of Velocity Field

A particle image velocity measurement, non-scattering smoothing technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as incompressible fluid continuity equations that cannot be guaranteed, and achieve the effect of eliminating high-frequency noise errors

Active Publication Date: 2018-11-02
BEIHANG UNIV +1
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The traditional smoothing method is not constrained by the non-dispersion of the vector field, so it cannot guarantee that the smoothed velocity field satisfies the continuity equation of the incompressible fluid

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
  • A Particle Image Velocimetry Method and Device Based on Dispersion-Free Smoothing of Velocity Field
  • A Particle Image Velocimetry Method and Device Based on Dispersion-Free Smoothing of Velocity Field
  • A Particle Image Velocimetry Method and Device Based on Dispersion-Free Smoothing of Velocity Field

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0061] In the embodiment of the present invention, the three velocity components of the three-dimensional velocity field are expanded into a column vector velocity field according to the coordinate index; a set of standard orthogonal basis vectors for astigmatism-free smoothing is constructed; velocity field smoothing parameters are calculated; according to the astigmatism-free smoothing The orthonormal basis vector group and the calculated velocity field smoothing parameters perform non-divergent smoothing on the column vector velocity field; restore the smoothed non-divergent column vector velocity field to a smooth three-dimensional velocity field with the same structure as the original velocity field .

[0062] Since the velocity field measured in the experiment is discrete data distributed on the nodes of the regular structure grid, at this time, the discrete form of the continuous equation shown in formula (1) should be considered. Usually, the discrete form of the contin...

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 present invention discloses a non-divergence smoothing processing method for a velocity field, comprising: expanding three velocity components of a three-dimensional velocity field into a column vector velocity field according to a coordinate index; constructing a non-divergence smoothing standard orthogonal basis vector set; calculating a velocity field smoothing parameter; performing non-divergence smoothing on the column vector velocity field according to the non-divergence smoothing standard orthogonal basis vector set and the velocity field smoothing parameter obtained through calculation; and reducing the smoothed non-divergence column vector velocity field into a smooth three-dimensional velocity field with the same structure with an original velocity field. The present invention further discloses a non-divergence smoothing processing apparatus for the velocity field. According to the present invention, not only can a high-frequency noise error be eliminated, but also the smoothed velocity field can meet a continuous equation of incompressible fluid.

Description

technical field [0001] The invention relates to the technical field of fluid mechanics velocity measurement, in particular to a particle image velocity measurement method and device based on non-dispersive smoothing of velocity field. Background technique [0002] Particle Image Velocimetry (PIV, Particle Image Velocimetry) is a modern image velocimetry technology, which measures the flow field velocity by tracking the tracer particles in the flow field. The tomographic PIV (Tomographic Particle Image Velocimetry) developed in recent years can Realize the measurement of the three-dimensional three-component (3D3C) of the velocity field in the body space. [0003] In the PIV experimental measurement, the experimental data is often disturbed by the noise error, which affects the measurement accuracy of the velocity field. Moreover, noise errors in the velocity field tend to propagate to other physical quantities calculated based on the velocity field, such as velocity gradien...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 高琪王成跃王晋军魏润杰
Owner BEIHANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com