High Sensitivity Boundary Layer Transition Detector

M. Azzazy; D. Modarress; T. Hoeft

doi:10.1117/12.949865

14 January 1986 High Sensitivity Boundary Layer Transition Detector

M. Azzazy, D. Modarress, T. Hoeft

Proceedings Volume 0569, High Speed Photography, Videography, and Photonics III; (1986) https://doi.org/10.1117/12.949865
Event: 29th Annual Technical Symposium, 1985, San Diego, United States

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.

Citation Download Citation

M. Azzazy, D. Modarress, and T. Hoeft "High Sensitivity Boundary Layer Transition Detector", Proc. SPIE 0569, High Speed Photography, Videography, and Photonics III, (14 January 1986); https://doi.org/10.1117/12.949865

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