A semi-empirical theory for surface mounted aerodynamic wall shear stress gauges

Mark R.D. Davies, James T. Duffy

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

Abstract

A new semi-empirical theory relating aerodynamic wall shear stress to the mean voltage from a surface mounted constant temperature hot film gauge is presented. High spatial resolution thermal images of the sensor area are used to obtain values for the mean sensor temperature and the thermal dimensions of the sensor. These thermal dimensions are shown to be invariant with Reynolds number. This data is used in the derivation of a new theory that effectively decouples the convection and conduction and hence removes the need for a fully conjugate analysis. The correct form of the relationship between sensor voltage and wall shear stress is a necessary prerequisite for gauge calibration and hence the quantification of aerodynamic wall shear stress. A calibration methodology is presented in an accompanying paper.

Original languageEnglish
Title of host publicationTurbomachinery
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791878781
DOIs
Publication statusPublished - 1995
EventASME 1995 International Gas Turbine and Aeroengine Congress and Exposition, GT 1995 - Houston, United States
Duration: 5 Jun 19958 Jun 1995

Publication series

NameProceedings of the ASME Turbo Expo
Volume1

Conference

ConferenceASME 1995 International Gas Turbine and Aeroengine Congress and Exposition, GT 1995
Country/TerritoryUnited States
CityHouston
Period5/06/958/06/95

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