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RESEARCH PAPERS

Radiation from Bending Waves in the Presence of a Flow Boundary Layer

[+] Author and Article Information
A. Akay

Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213

K. Uno Ingard

Department of Physics and Department of Aeronautics and Astronautics, Massachussetts Institute of Technology, Cambridge, MA 02139

J. Vib. Acoust 115(4), 411-416 (Oct 01, 1993) (6 pages) doi:10.1115/1.2930365 History: Received January 01, 1991; Online June 17, 2008

Abstract

The effect of refraction by a flow boundary layer on the radiation of sound from a bending wave on a plate is investigated. Based on the relative velocities of the bending wave and the flow, four qualitatively different regimes are identified and results of numerical studies of radiation impedance and power emission are presented and discussed. For comparison, the role of a visco-thermal boundary layer is included with a correction of a numerical error in a previous paper.

Copyright © 1993 by The American Society of Mechanical Engineers
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