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

doi:10.1134/S0015462817030073

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 journal › Article › peer-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 language	English
Pages (from-to)	394-400
Number of pages	7
Journal	Fluid Dynamics
Volume	52
Issue number	3
DOIs	https://doi.org/10.1134/S0015462817030073
Publication status	Published - 1 May 2017
Externally published	Yes

Keywords

flow separation
hydrodynamic stability
streaky structures
transition to turbulence
wave packets

Access to Document

10.1134/S0015462817030073

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AU - Kozlov, V. V.

AU - Pavlenko, A. M.

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KW - hydrodynamic stability

KW - streaky structures

KW - transition to turbulence

KW - wave packets

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