FIELD: mechanics; aircraft construction.
SUBSTANCE: inventions relate to aeromechanics, mainly to friction reduction method for axisymmetric body and related devices. Toroidal vortex with controlled parametres is generated in a boundary layer of axisymmetric body by periodic air flow blowing/suction through the circular slot available in axisymmetic body wall. The related device includes periodic vibrations source coupled with flow running over axisymmetric flow. The above mentioned circular slot in the wall of axisymmetric body is made so that it is directed to the longitudinal axis x at a negative angle. The longitudinal axis x is directed along generatix of axisymmetric body, wherethrough air is blown/drawn off at controlled amplitude and frequency by means of periodic vibrations source, for example dynamic loud-speaker.
EFFECT: reduced effect of superficial friction component in axisymmetric body by controlling vortex by frequency and intensity.
4 cl, 4 dwg, 1 ex
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