Prediction of Heat Transfer Coefficients in Gas Flow Normal to Finned and Smooth Tube Banks

[+] Author and Article Information
J. C. Biery

Los Alamos Scientific Laboratory, Los Alamos, N.M. and Department of Chemical Engineering, University of Florida

J. Heat Transfer 103(4), 705-714 (Nov 01, 1981) (10 pages) doi:10.1115/1.3244530 History: Received September 15, 1980; Online October 20, 2009


A new method is presented to predict heat transfer coefficients for gas flow normal to smooth and finned tube tanks with triangular pitch. A transformation from the actual tube bank to an equivalent equilateral triangular pitch infinite smooth tube bank (ETP-I-STB) is made. A function of Ch (Ch = NST NPR 2/3 NRe 0.4) versus (Xt D0 )Δ , ratio of transverse pitch to tube diameter for the ETP-I-STB, was developed. The Ch for the equivalent ETP-I-STP then applies to the actual tube bank. The method works with circular finned tubes, smooth tubes, continuous finned tubes, and segmented finned tubes with any triangular pitch. Also, fair predictions were made for in-line tubes with high Reynolds numbers.

Copyright © 1981 by ASME
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