Vol.2, No 8, 1998 pp. 655 - 668
UDC: 532.517.4

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VELOCITY CORRELATIONS IN THE WAKE BEHIND A CYLINDER
Dragan V. Petrović¹, Thoralf C. Schenck², Franz Durst^2
1Faculty of Agriculture, Institute for Agricultural Mechanization, Chair for Mathematics and Physics, University of Belgrade
²Lehrstuhl für Stromungsmechanik – LSTM, Tecshische Fakultät, Friedrich-Alexander Universität Erlangen-Nürnberg

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Abstract. In the paper is verified the existence of statistical relationships between higher-order velocity moments in the plain wake behind a cylinder. Although some differences are present, these connections are analogue to the general trends previously noticed in turbulent boundary layer and free jet: SS_U,V=10*S_U,V, SF_U,V=15*F_U,V-30, F_U=1.62*S_U²+2.65 and FV=3.13*S_V²+3.48. They represent a good base for further statistical analysis of turbulent flows and resolving the closure problem.

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KORELACIJE BRZINE U TRAGU IZA CILINDRA U radu je potvrđeno postojanje statističkih veza visih momenata brzine u dalekom polju ravanskog traga iza cilindra. Mada su izvesne razlike prisutne, ove veze su analogne opštim trendovima prethodno uočenim u turbulentnom graničnom sloju i slobodnoističućem mlazu:  SS_U,V=10*S_U,V, SF_U,V=15*F_U,V-30, F_U=1.62*S_U²+2.65 i FV=3.13*S_V²+3.48. One predstavljaju dobru osnovu za dalje statističke analize turbulentnih tokova i rešavanje problema zatvaranja sistema karakterističnih jednačina strujanja.