Finite Element Modeling of Acoustic Singularities with Application to Propeller Noise
Numerical formulations and results that expand on recent developments in finite element modeling of acoustic volume sources and acoustic dipoles are presented. It is shown that with a suitable structuring of the acoustic field equations it is possible to include monopoles and dipoles within the same analysis framework as has been extensively used for interior duct acoustic and duct inlet radiation problems. This allows the extension of the finite element modeling method to include the noise sources in such applications as propellers enclosed in a duct or in free space with mean flows. The necessary structuring of the acoustic field equations is shown, and example calculations are given for the case of one-dimensional sources and body forces in the presence of uniform mean flow.
W. Eversman and J. E. Steck, "Finite Element Modeling of Acoustic Singularities with Application to Propeller Noise," Journal of Aircraft, American Institute of Aeronautics and Astronautics (AIAA), Jan 1986.
The definitive version is available at http://dx.doi.org/10.2514/3.45300
Mechanical and Aerospace Engineering
Article - Journal
© 1986 American Institute of Aeronautics and Astronautics (AIAA), All rights reserved.