Laminar Flow Past a Circular Cylinder under the Effect of Nonstationary Jet Efflux to the Near-Wake Region
Authors: V. L. Zhdanov1; S. A. Isaev2; T. A. Baranova2
Source: Journal of Engineering Physics and Thermophysics, Volume 77, Number 5, September 2004 , pp. 1013-1021(9)
Publisher: Springer
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Abstract:
Changes in a laminar flow past a circular cylinder under the effect of jets blowing out to its rare region have been studied numerically. Jet efflux was caused by a return flow of a part of the incoming flow in the inner channels of the cylinder due to the pressure difference between its front and end stagnation points. The channels connected the inlet window formed in the zone of the front stagnation point with two outlet windows on the backside surface of the cylinder. The influence of the coordinates of the jets issuing through the outlet windows and dimensions of the inlet and outlet windows on variation of the drag and lift coefficient and distribution of the coefficients of pressure and friction on the cylinder surface has been considered. It is shown that under the effect of blowing out the cylinder drag decreased by 4% and the amplitude of buoyancy force oscillations decreased by 40%.Document Type: Research article
DOI: 10.1023/B:JOEP.0000049544.28150.38
Affiliations: 1: A. V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences of Belarus, 15 P. Brovka Str., Minsk, 220072, Belarus, Email: zhdanov@ns1.hmti.ac.by 2: Academy of Civil Aviation, St. Petersburg, Russia
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