Sound suppression of laminar separating flow over cavity

Seiichiro Izawa, Hiroshi Maita, Osamu Terashima, Ao Kui Xiong, Yu Fukunishi

Research output: Contribution to journalArticlepeer-review


A passive control of aerodynamic noise generated by a laminar separating flow over a cavity is carried out in a wind tunnel test and by numerical simulation, using a thin plate inserted into the cavity as a passive flow-controlling device. In the experiment, a noise suppression effect up to 14 dB is achieved by placing a plate in a proper location. It is shown that a plate of smaller vertical size is more effective. In the numerical simulation, it is shown that the location where the shear layer rolls up and the path of vortices are both very sensitive to plate position.

Original languageEnglish
Pages (from-to)1092-1097
Number of pages6
JournalJSME International Journal, Series B: Fluids and Thermal Engineering
Issue number4
Publication statusPublished - 2007 May 21


  • Cavity noise
  • Flow control
  • Noise suppression
  • Plate
  • Vortex

ASJC Scopus subject areas

  • Mechanical Engineering
  • Physical and Theoretical Chemistry
  • Fluid Flow and Transfer Processes


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