EVALUATING THE EFFICIENCY OF TURBULENT BOUNDARY-LAYER CONTROL FOR A BODY OF REVOLUTION VIA BLOWING THROUGH A PERFORATED SURFACE
V.I. Kornilov, A.N. Popkov
Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch of the Russian Academy of Sciences (ITAM SB RAS), Novosibirsk, Russia
Keywords: turbulent boundary layer, body of revolution, perforated surface, methodology, numerical simulation, injection efficiency
Abstract
A method is proposed for estimating the energy expenditure associated with air injection through a cylindrical section of a finely perforated surface on a high-aspect-ratio body of revolution at zero angle of attack in an incompressible flow. The method is based on the premise that the power required for injection is independent of both the power of the propulsion engine and the motion regime of the body. For a Reynolds number Re1 = 1.666 × 106 m-1, numerical simulations demonstrate that distributed air injection into the turbulent boundary layer of the body of revolution can yield power savings of 11 to 19 %, depending on the size of the computational domain.
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