Open Access

ARTICLE

Plane Wave Analysis of Panel Wedges

by T. Kar, M.L. Munjal¹

1 Facility for Research in Technical Acoustics, Department of Mechanical Engineering, IISc, Bangalore -560 012, India. Corresponding author: Tel.: +91 80 22932303; Fax:+91 80 23600648 Email: munjal@mecheng.iisc.ernet.in

Computer Modeling in Engineering & Sciences 2008, 27(1&2), 37-48. https://doi.org/10.3970/cmes.2008.027.037

Abstract

In the present work, a wedge structure made of absorbing panels has been analyzed by making use of the matrizant analysis with the help of the Boundary-Condition-Transfer (BCT) algorithm. The rectangular panel wedge, as it is called in this manuscript, is simple in geometry. The theoretical model, based on the plane wave acoustical coupling between multiple interacting ducts of variable cross sectional area, is applied to predict the pressure reflection coefficient of the present wedge configuration. Bulk reaction and hence wave propagation in the wedge material has been assumed in the proposed model. An asymptotic solution using the Peano-Baker series of matrix calculus is derived for different variable area ducts and then solved with the aid of the boundary condition transfer algorithm. A brief parametric study is also included as an aid to designers.

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