Stability of the laminar flow on a body of revolution at incidence
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, asymmetric flow, boundary-layer separation, hydrodynamic stability
Abstract
An asymmetric incompressible gas flow past a body of revolution was studied in a subsonic wind tunnel. Characteristics of the velocity field at the stern of the experimental model, where a laminar boundary-layer separation and concomitant destabilization of the flow occur under axisymmetric conditions, were determined. Declination of the axis of symmetry of the body within several angular degrees results in a radical change of the time-average velocity field, the amplitude distribution of growing hydrodynamic disturbances, and their spectral distribution.
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