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International Heat Transfer Conference 5

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

INFLUENCE OF THE STRUCTURE OF TURBULENT FLOW ON HEAT TRANSFER FROM A SINGLE CYLINDER IN A CROSS FLOW

S.Dj. Sikmanovic
Institute of nuclear sciences "Vinca"- Laboratory for Thermal Engineering and Energy Research, 11001 Belgrade, P.O.Box 522, Yugoslavia

Simeon N. Oka
Laboratory for Thermal Engineering and Institute of Nuclear Sciences — VINCA, Belgrade 11001, Serbia and Montenegro

S. Koncar-Djurdjevic
Faculty of Technology and Metallurgy, Faculty of Mechanical Engineering, Beograd, Yugoslavia

DOI: 10.1615/IHTC5.2290
pages 320-324

Abstract

The results of heat transfer measurements from a single cylinder in a highly turbulent flow are given. Measurements were performed at the nominally constant Reynolds number (19000), for turbulence intensities 2.5% to 16% and turbulence macroscales O. 5 cm to 1. 82 cm. Special attention was paid to generating and measuring grid turbulence. Stagnation point heat transfer, mean heat transfer and the flow pattern have been analysed. The results have shown different characteristics of heat transfer and the flow pattern around a cylinder in a highly turbulent free stream at a small Reynolds number, compared with the results obtained at Reynolds numbers near critical.

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