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Direct measurement of skin friction with a new instrumentThe design and performance of a small belt-type skin-friction gage to measure wall shear-stress coefficients in wind-tunnel testing are described, summarizing the report of Vakili and Wu (1982). The sensor employs a flexible belt of variable surface characteristics; this belt, wrapped tightly around two cylinders mounted on frictionless flexures, is equipped with strain gages to estimate the deflection of the belt by the flow. An alternative approach uses IR illumination, optical fibers, and a photosensitive transistor, permitting direct measurement of the belt deflection. Drawings, diagrams, and graphs of sample data are provided.
Document ID
19870038021
Document Type
Conference Paper
Authors
Vakili, A. D. (Tennessee Univ. Tullahoma, TN, United States)
Wu, J. M. (Tennessee, University Tullahoma, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1986
Subject Category
INSTRUMENTATION AND PHOTOGRAPHY
Distribution Limits
Public
Copyright
Other