Boundary-layer receptivity of sound with roughnessAn experimental study of receptivity was carried out using an acoustical disturbance in the freestream. The receptivity was enhanced by using a uniform two-dimensional roughness strip (tape). The roughness strip generated the local adjustment in the flow needed to couple the long-wavelength sound wave with the short-wavelength T-S wave. The method proved to be highly sensitive, with slight changes in the forcing frequency or in the height of the 2D roughness element having a strong effect on the amplitude of the observed T-S wave.
Document ID
19920053382
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Saric, William S. (NASA Ames Research Center Moffett Field, CA, United States)
Hoos, Jon A. (NASA Ames Research Center Moffett Field, CA, United States)
Radeztsky, Ronald H. (Arizona State University Tempe, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1991
Subject Category
Acoustics
Meeting Information
Meeting: ASME and JSME Joint Fluids Engineering Conference