Resonant phenomena in a transonic flow around an airfoil with pulsed periodic energy supply

S. M. Aulchenko, V. P. Zamuraev, A. P. Kalinina

Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia

Abstract: Interaction of a pulsed periodic source of energy with a closing shock wave arising near airfoils in transonic flight is studied. The evolution of the shock-wave structure of the flow around a symmetric airfoil is examined by solving two-dimensional unsteady gas-dynamic equations, and a resonant mechanism of interaction is found, which leads to considerable (by an order of magnitude) reduction of the wave drag of the airfoil.

Keywords: transonic flow, airfoil, energy supply, aerodynamic characteristics.

UDC: 533.6.011

Received: 18.05.2010
Accepted: 24.09.2010

 English version: Journal of Applied Mechanics and Technical Physics, 2011, 52:5, 748–754

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