Acoustic Transmission in Lined Flow Ducts: A Finite Element Eigenvalue Problem
Abstract
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)
Recommended Citation
R. J. Astley and W. Eversman, "Acoustic Transmission in Lined Flow Ducts: A Finite Element Eigenvalue Problem," Proceedings of the 3rd International Conference on Finite Elements in Flow Problemss (1980, Banff, Canada), University of Calgary, Jun 1980.
Meeting Name
3rd International Conference on Finite Elements in Flow Problems (1980: Jun. 10-13, Banff, Alberta, Canada)
Department(s)
Mechanical and Aerospace Engineering
Document Type
Article - Conference proceedings
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 1980 University of Calgary, All rights reserved.
Publication Date
13 Jun 1980
