Aeroacoustics of merging flows at duct junction

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Abstract

This paper aims to report a numerical investigation of the aeroacoustics of merging flows at a duct junction and this is done by directly solving Navier-Stokes equations with the conservation element and solution element scheme. This method has already been demonstrated as a successful tool in investigating various aeroacoustics problems. The first part of this paper presents a study of wave propagation at 90° junction, which illustrates the capability of CE/SE method in capturing the acoustics accurately. The second part shows the investigation of merging angle effect at the duct junction on the noise generation. Duct junction with merging angles of 30°, 60° and 90° were studied. It is found that the noise is originated at the wake region of the duct junction while the shear layer created between the two merging flows at the upstream corner of the junction is not important in this process.
Original languageEnglish
Title of host publicationICTCA 2011 - 10th International Conference on Theoretical and Computational Acoustics, Proceeding
Pages274-283
Number of pages10
Publication statusPublished - 1 Dec 2012
Event10th International Conference on Theoretical and Computational Acoustics, ICTCA 2011 - Taipei, Taiwan
Duration: 24 Apr 201128 Apr 2011

Conference

Conference10th International Conference on Theoretical and Computational Acoustics, ICTCA 2011
CountryTaiwan
CityTaipei
Period24/04/1128/04/11

ASJC Scopus subject areas

  • Computational Theory and Mathematics
  • Acoustics and Ultrasonics

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