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Development and use of a vane device for boundary-layer measurements

Published online by Cambridge University Press:  28 March 2006

J. G. Burns
Affiliation:
Physics Department, University of Edinburgh.
W. H. J. Childs
Affiliation:
Heriot-Watt College, Edinburgh.
A. A. Nicol
Affiliation:
Physics Department, University of Edinburgh.
M. A. S. Ross
Affiliation:
Physics Department, University of Edinburgh.

Abstract

A hinged vane and a sensitive electrical system for recording the motion of the vane have been developed for the observation of fluctuating y-components of velocity in boundary layers. An approximate theory of the natural oscillations of such vanes is presented and experimentally verified. Using vanes as resonant detectors, meassurements have been made of oscillations injected into the laminar boundary layer on a flat plate in a wind tunnel with 0·3% free-stream turbulence. Points on the neutral Tollmien-Schlichting curve have thereby been obtained which lie close to the theoretical neutral curve.

Type
Research Article
Copyright
© 1959 Cambridge University Press

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References

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