An instrument for wall shear stress measurement

Yuchao Yan, Chengyu Jiang, Binghe Ma, Runbo Chen, Jinjun Deng, Jian Luo, Tiande Gao, Hui Xu

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The instrument is designed for wall shear stress measurement, operating with flexible hot film sensors or floating-element sensors. The hot film sensor can be used to measure the wall shear stress on curved surfaces. And the floating-element sensor directly senses wall shear stress, and the output signal has good linear characteristics. The application software of the instrument is developed to analyze wall shear stress and flow phenomena of the boundary layer. The benchmark experiments of the flat plate were conducted in wind tunnels to show that the instrument with hot film sensors has a related normalized standard deviation of 1.02%, and with floating-element sensors has a related normalized standard deviation of 0.92% and a good linearity of 1.5%. And dynamic calibrations of the instrument with floating-element sensor show that the instrument has a dynamic response up to 6500 Hz.

Original languageEnglish
Title of host publicationNinth International Symposium on Precision Mechanical Measurements
EditorsLiandong Yu
PublisherSPIE
ISBN (Electronic)9781510634589
DOIs
StatePublished - 2019
Event9th International Symposium on Precision Mechanical Measurements, ISPMM 2019 - Chongqing, China
Duration: 18 Oct 201921 Oct 2019

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume11343
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

Conference9th International Symposium on Precision Mechanical Measurements, ISPMM 2019
Country/TerritoryChina
CityChongqing
Period18/10/1921/10/19

Keywords

  • Boundary layer analysis
  • Flexible hot film
  • Floating-element sensor
  • Wall shear stress

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