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 |
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Pages (from-to) | 394-400 |
Number of pages | 7 |
Journal | Fluid Dynamics |
Volume | 52 |
Issue number | 3 |
DOIs | |
Publication status | Published - 1 May 2017 |
Externally published | Yes |
Keywords
- flow separation
- hydrodynamic stability
- streaky structures
- transition to turbulence
- wave packets