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Proceedings Paper

High Sensitivity Boundary Layer Transition Detector
Author(s): M. Azzazy; D. Modarress; T. Hoeft
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Paper Abstract

A high sensitivity differential interferometer has been developed to locate the region where the boundary layer flow changes from laminar to turbulent. Two experimental configurations have been used to evaluate the performance of the interferometer, open shear layer configuration and wind tunnel turbulent spot configuration. In each experiment small temperature fluctuations were introduced as the signal source. Simultaneous cold wire measurements have been compared with the interferometer data. The comparison shows that the interferometer is sensitive to very weak phase variations in the order of 10-3 the laser wavelength.

Paper Details

Date Published: 14 January 1986
PDF: 10 pages
Proc. SPIE 0569, High Speed Photography, Videography, and Photonics III, (14 January 1986); doi: 10.1117/12.949865
Show Author Affiliations
M. Azzazy, Spectron Development Laboratories, Inc. (United States)
D. Modarress, Spectron Development Laboratories, Inc. (United States)
T. Hoeft, Spectron Development Laboratories, Inc. (United States)


Published in SPIE Proceedings Vol. 0569:
High Speed Photography, Videography, and Photonics III
Howard C. Johnson; Bernard G. Ponseggi, Editor(s)

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