Application of biprism shear strain-rate meter in two dimensional channel flow

Author

Sun, Hou-jun ; Qe, Jin-you

Author_Institution

Beijing Inst. of Civil Eng. & Archit., China

fYear

1991

fDate

27-31 Oct 1991

Firstpage

240

Lastpage

245

Abstract

For avoidance of any intrusion disturbing the flow in a viscous sublayer, a biprism shear strain-rate meter has been developed. The biprism shear strain rate meter utilizes the linear distribution characteristics of velocity in the viscous sublayer. It can measure shear strain rate directly and give an instantaneous value. The skin friction of two-dimensional channel flow has been investigated by means of the biprism shear strain-rate meter. Results of an experiment in laminar flow agree quite well with theoretical prediction. Results in turbulent flow may be expressed as C_f=0.12/Re_B^0.339, where C_f is the skin friction coefficient, and Re_B is the Reynolds number in terms of channel width B

Keywords

channel flow; flow measurement; laminar flow; shear turbulence; strain measurement; viscosity of liquids; 2D flow; Reynolds number; biprism shear strain-rate meter; laminar flow; linear distribution characteristics; measurement by laser beam; skin friction coefficient; turbulent flow; two dimensional channel flow; viscous sublayer; Friction; Interference; Laser beams; Optical refraction; Optical surface waves; Skin; Strain measurement; Surface emitting lasers; Velocity measurement; Viscosity;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation in Aerospace Simulation Facilities, 1991. ICIASF '91 Record., International Congress on

Conference_Location

Rockville, MD

Type

conf

DOI

10.1109/ICIASF.1991.186245

Filename

186245