Title :
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
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 Cf=0.12/ReB 0.339, where Cf is the skin friction coefficient, and ReB 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;
Conference_Titel :
Instrumentation in Aerospace Simulation Facilities, 1991. ICIASF '91 Record., International Congress on
Conference_Location :
Rockville, MD
DOI :
10.1109/ICIASF.1991.186245
