Title

Wave Envelope and Infinite Element Schemes for Fan Noise Radiation from Turbofan Inlets

Abstract

Finite element models are presented for the calculation of radiated fan noise in the vicinity of turbofran inlets. The models involve the use of conventional axisymmetric finite elements in an inner region close to the inlet. The far field is represented by infinite elements or wave envelope elements. Theory and results are presented for the case with no mean flow. Comparisons of computed data with analytic solutions and measured values establish the utility of both the infinite element and wave envelope element schemes. The wave envelope scheme is shown to be effective also in the far field. Both schemes use meshes which are much sparser than would be required in conventional numerical discretizations and may be applied to real inlet configurations at modest computational cost.

Department(s)

Mechanical and Aerospace Engineering

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1984 American Institute of Aeronautics and Astronautics (AIAA), All rights reserved.


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