Heat transfer and heat resistance of cross-streamlined ring-grooved tube bundles

Аuthors

Myakochin A. S.

Moscow Aviation Institute (National Research University), 4, Volokolamskoe shosse, Moscow, А-80, GSP-3, 125993, Russia

e-mail: amyakochin@gmail.com

Abstract

An experimental study is carried out to analyze mean heat transfer as well as hydraulic resistance for a tube located within a bundle in the leading row and in some deep-laid one. Experiments are performed for a range of the Prandtl numbers from 0,7 to 0,7 and for Reynolds numbers range from 1,2×10³ to 7×10⁴. It is found that the heat transfer of leading rows for a staggered-tube bundle is by 21-49 % less than the heat transfer of deep-laid rows depending values of the Reynolds number and some other parameters. In case of low Reynolds numbers a volumetric heat transfer efficiency for smooth tubes and circular-grooved ones are identical for same configurations. For high Reynolds numbers smooth tube bundles are more effective than circular-grooved ones. The experimental results obtained are generalized and compared with data from other researchers.