Response of axisymmetric separated flow to its spatially localized perturbation
A.V. Dovgal, B.Yu. Zanin, and A.M. Sorokin
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
E-mail: dovgal@itam.nsc.ru, zanin@itam.nsc.ru
Keywords: axisymmetric body, flow separation, control of separation, hydrodynamic stability
Pages: 801–807
Abstract
The flow past an axisymmetric body with laminar boundary-layer separation in a low-velocity air stream has been studied. The hot-wire technique was employed to identify the variation of velocity field induced by a local stationary perturbation of separation region at the stern of the experimental model. A large-scale influence upon the near-wall flow due to a cylinder roughness element provided on the model surface was observed. The obtained data substantiate the possibility of controlling the laminar boundary-layer separation on an axisymmetric body using a local external forcing.
DOI: 10.1134/S0869864316060020
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