Evolution of laminar flow disturbances behind a step on a surface generated by its localized vibrations

A. V. Dovgal, M. M. Katasonov, V. V. Kozlov, A. M. Pavlenko

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The formation and development of hydrodynamic disturbances generated by low-frequency vibrations of a local region on a flat plate behind a rectangular step in separated flow is investigated in a wind tunnel. The results are obtained at a small subsonic flow velocity using the hot-wire anemometry. It is established that the wall vibrations induce separation zone disturbances representing streaky structures accompanied by wave oscillation packets. Laminar boundary layer separation favors the wave packet growth followed by wall flow turbulization.

Original languageEnglish
Pages (from-to)394-400
Number of pages7
JournalFluid Dynamics
Volume52
Issue number3
DOIs
Publication statusPublished - 1 May 2017
Externally publishedYes

Keywords

  • flow separation
  • hydrodynamic stability
  • streaky structures
  • transition to turbulence
  • wave packets

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