Acoustic Transmission in Lined Flow Ducts: A Finite Element Eigenvalue Problem.
A finite element Galerkin formulation is used for the calculation of acoustical modes in uniform ducts with arbitrary geometry, mean flow and lining configuration. Hermitian “non-conforming” sub-parametric elements are used and the dimensionality of the resulting eigenmatrix is reduced by the use of a condensation scheme based on the compatible eigenvectors in the case with no mean flow. Results are presented for simple circular and rectangular configurations for which exact comparison results are readily calculable. (A)
R. J. Astley and W. Eversman, "Acoustic Transmission in Lined Flow Ducts: A Finite Element Eigenvalue Problem.," Proc. 3rd int. Conf. On finite elements in flow problems, University of Calgary, Jan 1980.
Mechanical and Aerospace Engineering
Article - Journal
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