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

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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.

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Authors and Affiliations

  1. St. Petersburg State University of Civil Aviation, St. Petersburg, 196210, Russia

    S. A. Isaev, P. A. Baranov, N. I. Vatin, Yu. V. Zhukova & A. G. Sudakov

  2. St. Petersburg State Polytechnic University, St. Petersburg, 195251, Russia

    S. A. Isaev, P. A. Baranov, N. I. Vatin, Yu. V. Zhukova & A. G. Sudakov

  3. Lykov Institute of Heat and Mass Transfer, Belarusian National Academy of Sciences, Minsk, 220072, Belarus

    S. A. Isaev, P. A. Baranov, N. I. Vatin, Yu. V. Zhukova & A. G. Sudakov

Authors
  1. S. A. Isaev
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  2. P. A. Baranov
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  3. N. I. Vatin
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  4. Yu. V. Zhukova
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  5. A. G. Sudakov
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Correspondence to S. A. Isaev.

Additional information

Original Russian Text © S.A. Isaev, P.A. Baranov, N.I. Vatin, Yu.V. Zhukova, A.G. Sudakov, 2014, published in Pis’ma v Zhurnal Tekhnicheskoi Fiziki, 2014, Vol. 40, No. 15, pp. 50–57.

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Isaev, S.A., Baranov, P.A., Vatin, N.I. et al. Suppression of the Karman vortex street and reduction in the frontal drag of a circular cylinder with two vortex cells. Tech. Phys. Lett. 40, 653–656 (2014). https://doi.org/10.1134/S1063785014080057

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  • DOI: https://doi.org/10.1134/S1063785014080057

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