Aerodynamic noise prediction for long-span bodies

J. H. Seo, K. W. Chang, Y. J. Moon

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Citations (Scopus)

Abstract

A prediction method for aerodynamic noise from long-span bodies is proposed. The present method is based on the hybrid method, and consists of (i) incompressible large eddy simulation (LES), (ii) linearized perturbed compressible equations (LPCE) for 2D acoustic field at spanwise wave number, kz=0, (iii) 2D Kirchhoff method, Oberai's 3D-correction for spectral acoustic pressure at the far-field, and (iv) estimation of the far-field SPL for a long-span body with considering spanwise coherence function. In the present study, accuracy of the hybrid methods is assessed by considering turbulent flow noise problems for a fundamental aerodynamic body with long span. The nose from a circular cylinder with 30D span at ReD=4.6×104 and M=0.21 is predicted with the present methodology. Aerodynamic and aeroacoustic results are compared with the experimental data. Also, fundamental issues on computations of acoustic field, and estimation methods for SPL will be discussed in conjunction with the proper flow physics.

Original languageEnglish
Title of host publicationCollection of Technical Papers - 12th AIAA/CEAS Aeroacoustics Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
Pages2151-2166
Number of pages16
ISBN (Print)1563478099, 9781563478093
DOIs
Publication statusPublished - 2006
Event12th AIAA/CEAS Aeroacoustics Conference - Cambridge, MA, United States
Duration: 2006 May 82006 May 10

Publication series

NameCollection of Technical Papers - 12th AIAA/CEAS Aeroacoustics Conference
Volume4

Other

Other12th AIAA/CEAS Aeroacoustics Conference
CountryUnited States
CityCambridge, MA
Period06/5/806/5/10

ASJC Scopus subject areas

  • Engineering(all)

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