WIT Press


A Two-dimensional BEM Formulation For Acoustic Radiation Under A Uniform Subsonic Flow

Price

Free (open access)

Paper DOI

10.2495/BT950231

Volume

11

Pages

9

Published

1995

Size

597 kb

Author(s)

L.A. de Lacerda, L.C. Wrobel & W.J. Mansui

Abstract

This paper presents a BEM formulation for two-dimensional acoustic radiation in a uniform subsonic flow in which the Green's function auto- matically incorporates the convective effect. Because the resulting integral equation involves the derivative of the velocity potential in the flow direc- tion, an approximation is necessary to express this extra variable in terms of the potential and its normal derivative. Numerical results are included to verify the formulation. 1 Introduction The calculation of acoustic fields propagating in subsonic flows and the interaction of such fields wit

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