Abstract
Results of a full-scale experiment on studying heat transfer on the surface of a reinforced-concrete smoke stack blown by wind at the value of Reynolds number Re = 1.05 × 107 are presented. Comparison of the experimental results with the experimental data obtained previously by other researchers under laboratory conditions at Re < 4 × 106 showed that these data differ essentially from each other in the distribution of local heat transfer coefficients. Factors affecting heat transfer under field conditions are considered together with the possible causes due to which they differ from the factors that take place in laboratory investigations. It should be noted that the values of heat transfer coefficient averaged over the smoke stack generatrix are in satisfactory agreement with the experimental results obtained by extrapolating the data to the region of higher Reynolds numbers for a circular smooth cylinder in a transcritical streamlining mode. The data obtained in the present study open the possibility to estimate the average values of heat transfer coefficient on the surface of smoke stacks in a flow of atmospheric air at 4 × 106 < Re < 107.
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Original Russian Text © A.P. Maneev, V.I. Terekhov, 2015, published in Teploenergetika.
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Maneev, A.P., Terekhov, V.I. Specific features of heat transfer on the external surface of smoke stacks blown by wind. Therm. Eng. 62, 183–189 (2015). https://doi.org/10.1134/S0040601515030064
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DOI: https://doi.org/10.1134/S0040601515030064