Laminar and turbulent shear stress measurement using surface hot-wire and film gauges

Author

Savory, E. ; Gaudet, L. ; Toy, N.

Author_Institution

Dept. of Civil Eng., Surrey Univ., Guildford, UK

fYear

1995

fDate

18-21 Jul 1995

Firstpage

42491

Lastpage

42496

Abstract

The work presented is a comparison between the performances of simple miniature hot-wire gauges and commercially available surface hot-films for measuring surface skin friction on wind tunnel models under laminar and turbulent flow conditions. It is shown that the wire gauge is the more sensitive device in terms of response to the flow whilst, at the same time, being the more robust of the two gauges. In addition, the roughness effects due to the 25 μm thick polymer substrate reduce the film gauge sensor response

Keywords

aerodynamics; boundary layer turbulence; flow measurement; friction; laminar flow; wind tunnels; 25 micron; aerodynamic boundary layer flows; hot-wire gauges; laminar flow conditions; laminar shear stress measurement; roughness effects; sensor response; surface hot-film gauges; surface skin friction; turbulent flow conditions; turbulent shear stress measurement; wind tunnel models; Fluid flow measurement; Friction; Performance evaluation; Polymer films; Robustness; Rough surfaces; Skin; Stress measurement; Surface roughness; Wire;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation in Aerospace Simulation Facilities, 1995. ICIASF '95 Record., International Congress on

Conference_Location

Wright-Patterson AFB, OH

Print_ISBN

0-7803-2088-3

Type

conf

DOI

10.1109/ICIASF.1995.519111

Filename

519111