Abstract
For the most part, our investigations have been experimental. They have involved the use of a low-noise, low-turbulence, subsonic wind tunnel with a test cross-section 15” by 15”. Laminar boundary layers are grown on a polished aluminum flat plate with internal damping. The plates are all 1/2” thick and are fitted with a 6:1 semi-elliptical leading edge. The first experiments, reported by Shapiro [1977], involved excitation by a nearly plain, pure tone, acoustic wave travelling downstream over the test plate. A now classic standing wave pattern was found in the boundary layer (Figures 1 and 2). The wavelength of the standing wave was that of a Tollmien-Schlichting (T-S) wave at the frequency of the acoustic wave.
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© 1990 Springer-Verlag New York Inc.
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Leehey, P. (1990). Receptivity Investigations. In: Hussaini, M.Y., Voigt, R.G. (eds) Instability and Transition. ICASE/NASA LaRC Series. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-3430-2_31
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DOI: https://doi.org/10.1007/978-1-4612-3430-2_31
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