This article is cited in 19 papers

Suppression of the Karman vortex street and reduction in the frontal drag of a circular cylinder with two vortex cells

S. A. Isaev^ab, P. A. Baranov^ab, N. I. Vatin^ab, Yu. V. Zhukova^c, A. G. Sudakov<sup>ab

a</sup> Saint-Petersburg State University of Civil Aviation
^b Peter the Great St. Petersburg Polytechnic University
^c Institute for Heat and Mass Transfer named after A. V. Lykov, Belarus Academy of Sciences

Abstract: Numerical analysis of an unsteady-state two-dimensional incompressible flow at a Reynolds number of 40000 around a circular cylinder with two vortex cells is carried out on the basis of the finite-volume solution of the Reynolds equations closed by the Menter’s shear-stress transport model. The vortex cells are fitted with slots that ensure suction into the central channel via a fan located and through outflow of a low-pressure jet. It is shown that the suction in small-size cells intensifies the circulatory flow inside it and leads to the rearrangement of a large-scale structure of the flow around the cylinder accompanied by suppression of the Karman vortex street and a slightly symmetrical stabilization of the wake. The frontal drag of the cylinder decreases almost by three times with an optimal coefficient of the sucked air rate.

Received: 18.03.2014

 English version: Technical Physics Letters, 2014, 40:8, 653–656

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