Behaviour of the Vortex Layer Generated in the Flow by an Impulse Change of Circulation Around a Profile
The paper presents results of visualisation studies of the vortex layer shedding from a symmetrical Joukovsky profile into a parallel flow of Reynolds number equal to 8·103 due to a sudden change of circulation following rotation by a small angle. Evolution, formation of a coherent structure and dissipation of the layer is presented using the smoke-wire technique. The reason of the short-lived intensification of the path behind the trailing vortex is discussed. Some results of quantitative considerations on the velocity and circulation of the vortex are presented.
KeywordsVortex Resis Smoke Paral Vaseline
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