6. Physics of a Fluid, Neutral and Ionized Gases

EVOLUTION OF WAVE PACKETS IN A LAMINAR SEPARATION BUBBLE

Aleksandr V. Dovgal
1. Khristianovich Institute of Theoretical and Applied Mechanics SB RAS Novosibirsk, Russian Federation
2. Novosibirsk State University Novosibirsk, Russian Federation
dovgal@itam.nsc.ru
Aleksandr M. Sorokin
1. Khristianovich Institute of Theoretical and Applied Mechanics SB RAS Novosibirsk, Russian Federation
2. Novosibirsk State University Novosibirsk, Russian Federation
am_sorokin@ngs.ru
The material was received by the Editorial Board: 14.06.2011
Wave packets of time-harmonic disturbances in a laminar separated flow behind a backward-facing step on flat plate are investigated. Experimental data are obtained through hot-wire measurements in a low-turbulent subsonic wind tunnel. The results show that the oscillations generated locally in the separation region are transported upstream which makes an essential difference between the separation bubble under self-excitation and the attached boundary layer.

Keywords:
boundary layer separation, hydrodynamic instability, wave packets, self-excitation
УДК 532.526.5

EVOLUTION OF WAVE PACKETS IN A LAMINAR SEPARATION BUBBLE
References: Dovgal A. V., Sorokin A. M. EVOLUTION OF WAVE PACKETS IN A LAMINAR SEPARATION BUBBLE. Vestnik NSU. Series: Physics. 2011, vol. 6, no. 3. P. 33–39 (in Russ.). DOI: 10.54362/1818-7919-2011-6-3-33-39