Generation of acoustic disturbances in supersonic laminar cavity flows

Weipeng Li, Taku Nonomura, Kozo Fujii

Research output: Contribution to journalArticle

Abstract

The generation of acoustic disturbances in supersonic laminar cavity flows is investigated by large-eddy simulations of supersonic laminar flow (M = 1:2, 2:0, and 3:0) past a rectangular cavity with a length-to-depth ratio of 2. Results suggest that well-originated large-scale vortical structures with strong spanwise coherence are present in the shear layer. Compressibility effects have significant impacts on the shear-layer development and the fluctuation properties. The dominant mechanism for the acoustic radiation in supersonic laminar cavity flows is shown to be associated with the successive passage of large-scale vortices over the cavity trailing edge. It is found that Mach waves radiated from the cavity shear layer may have significant contributions for the noiseradiation in terms of enhancing the strength of the feedback compression waves.

Original languageEnglish
Pages (from-to)135-142
Number of pages8
JournalInternational Journal of Acoustics and Vibrations
Volume20
Issue number4
Publication statusPublished - 2015 Dec
Externally publishedYes

ASJC Scopus subject areas

  • Acoustics and Ultrasonics
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Generation of acoustic disturbances in supersonic laminar cavity flows'. Together they form a unique fingerprint.

  • Cite this