Identification of an aeroacoustic source using the inverse boundary element method

F. Martinus, D. W. Herrin, J. Han

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

The use of the inverse boundary element method (BEM) to identify aeroacoustic noise sources is explored. In the suggested approach, sound pressure at locations out of the flow field are measured, followed by the reconstruction of acoustic particle velocity on the surface where the noise is generated. Using this reconstructed acoustic particle velocity, the acoustic response elsewhere in the field can be predicted. This paper demonstrates that good results can be obtained using a manageable number of sound pressure measurements that need not be in the flow field or conformal to the source. The first example is an open-ended duct without flow where measurements made around the periphery of the duct are used to reconstruct the particle velocity on the opening. The second example applies the approach to predicting vortex shedding noise resulting from airflow over a cylindrical rod. The reconstructed particle velocity is used to predict sound pressure in the field. The predicted sound pressure agreed with measured results.

Original languageEnglish
Pages (from-to)83-92
Number of pages10
JournalNoise Control Engineering Journal
Volume58
Issue number1
DOIs
StatePublished - Jan 2010

ASJC Scopus subject areas

  • Building and Construction
  • Automotive Engineering
  • Aerospace Engineering
  • Acoustics and Ultrasonics
  • Mechanical Engineering
  • Public Health, Environmental and Occupational Health
  • Industrial and Manufacturing Engineering

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