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ISSN Online: 2377-424X

ISBN Print: 0-89116-299-2

International Heat Transfer Conference 7
September, 6-10, 1982, Munich, Germany

EFFECTS OF TURBULENCE PARAMETERS ON HEAT TRANSFER OF CROSS FLOW HEAT EXCHANGERS

Get access (open in a dialog) DOI: 10.1615/IHTC7.2170
pages 233-238

Résumé

Experimental data are presented indicating effects of streamwise turbulence intensity and streamwise integral length scale of gas side inlet free stream turbulence on heat transfer from liquid-to-gas heat exchangers for passage Reynolds numbers from 600 to 8,000. The inlet turbulence intensity was varied from 0.2 percent to 16 percent and the integral length scale from 0.005 m to 0.025 m. Experiments were conducted for heat exchangers with nominal gas side flow lengths from 0.033 m to 0.152 m and fin densities from 157.5 to 551 fins per meter. Results are given for plate fins with both staggered and in-line tubes and for one type of louvered fin. It is concluded, for the ranges covered, that augmentation of heat transfer coefficients occurs due to increased turbulence intensity; however, the effect of integral length scale is small. Comparison of results with the literature is included.