Abstract
Variable order mapped infinite wave envelope elements are developed for finite element modeling of acoustic radiation in a uniformly moving medium. These elements can be used outside of the near field as a non-reflecting boundary condition for computations on an infinite domain in which a radiating body is immersed in a moving medium. Mapped infinite wave envelope elements provide a boundary condition equivalent to stiffness, mass, and damping matrices appended to the inner mesh. A demonstration of the characteristics of the mapped infinite wave envelope elements is given in the context of acoustic radiation from a turbofan inlet for which benchmark results are known. In addition, the Kirchhoff method has been investigated in the context of the turbofan inlet radiation problem to extend the solution to the far field. By comparing the results of the mapped infinite wave envelope element analysis with the Kirchhoff method it has been shown that the mapped elements are adequate in constructing the proper wave structure in the far field.
Recommended Citation
W. Eversman and I. Danda Roy, "A New Reflection Free Boundary in Uniform Flow using Mapped Infinite Wave Envelope Elements," 5th AIAA/CEAS Aeroacoustics Conference and Exhibit, pp. 160 - 170, article no. AIAA 99-1823, American Institute of Aeronautics and Astronautics, Jan 1999.
The definitive version is available at https://doi.org/10.2514/6.1999-1823
Department(s)
Mechanical and Aerospace Engineering
Publication Status
Full Access
Document Type
Article - Conference proceedings
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 American Institute of Aeronautics and Astronautics, All rights reserved.
Publication Date
01 Jan 1999
