Prediction of fan exhaust noise propagation

Steven A.E. Miller, Philip J. Morris, Yuan Zhao

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

3 Scopus citations

Abstract

A method is presented to predict the far-field sound pressure levels from the fan exhaust. The levels are found based on a known source distribution of the acoustic pressure and velocity perturbations inside the exhaust fan duct. This source distribution is propagated through the fan exhaust shear layer to a porous Ffowcs Williams-Hawkings surface using the linearized Euler equations. The linearized Euler equations are discretized in the frequency domain with the Streamline Upwind Petrov Galerkin method on an unstructured grid and are solved in parallel. This technique enables a stable numerical solution of the linearized Euler equations to be obtained. Results are shown for the Source Diagnostics Test which has a realistic engine geometry and a high speed fan-exit ow with fan tones at a relatively high frequency. Comparisons are made between the predicted and measured far-field sound pressure levels at twice the blade passage frequency.

Original languageEnglish (US)
Title of host publication15th AIAA/CEAS Aeroacoustics Conference (30th AIAA Aeroacoustics Conference)
StatePublished - 2009
Event15th AIAA/CEAS Aeroacoustics Conference (30th AIAA Aeroacoustics Conference) - Miami, FL, United States
Duration: May 11 2009May 13 2009

Publication series

Name15th AIAA/CEAS Aeroacoustics Conference (30th AIAA Aeroacoustics Conference)

Other

Other15th AIAA/CEAS Aeroacoustics Conference (30th AIAA Aeroacoustics Conference)
CountryUnited States
CityMiami, FL
Period5/11/095/13/09

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Mechanical Engineering

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  • Cite this

    Miller, S. A. E., Morris, P. J., & Zhao, Y. (2009). Prediction of fan exhaust noise propagation. In 15th AIAA/CEAS Aeroacoustics Conference (30th AIAA Aeroacoustics Conference) [2009-3145] (15th AIAA/CEAS Aeroacoustics Conference (30th AIAA Aeroacoustics Conference)).