Mach number dependence on sound sources in high mach number turbulent mixing layer

Daiki Terakado, Taku Nonomura, Akira Oyama, Kozo Fujii

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

6 Citations (Scopus)


The convective Mach number dependences of sound sources in a compressible mixing layer are investigated by direct numerical simulation. Characteristics of sound sources are analyzed using the source terms of the Lighthill equation. The acoustic waves become weaker with increasing the Mach number due to the weaker vortices by compressibility and the canceling out of the Reynolds stress term and the entropy term. Also, the smaller scale acoustic waves appears for Mc ≥ 1.5. The results suggest that those change in the characteristics of the sound sources are due to the appearance of shocklets for larger convective Mach number cases. Also, those cases show the higher turbulent Mach number over the wide range of flow field.

Original languageEnglish
Title of host publication22nd AIAA/CEAS Aeroacoustics Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624103865
Publication statusPublished - 2016
Externally publishedYes
Event22nd AIAA/CEAS Aeroacoustics Conference, 2016 - Lyon, France
Duration: 2016 May 302016 Jun 1


Other22nd AIAA/CEAS Aeroacoustics Conference, 2016

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Aerospace Engineering


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