Effects of Nonuniform Passages on Deepfold Heat Exchanger Performance

[+] Author and Article Information
J. R. Mondt

Engine Research Department, General Motors Research Laboratory, General Motors Corp., Warren, Mich.

J. Eng. Power 99(4), 657-663 (Oct 01, 1977) (7 pages) doi:10.1115/1.3446564 History: Received May 18, 1977; Online July 14, 2010


To realize the maximum convective transfer of heat or mass, the fins in a plate-fin type heat exchanger must be exactly spaced for an unsupported length at least eight times the fin spacing. Manufacturing tolerances cause imperfect fin spacing and fin shape. These imperfections have been statistically modeled as either nonuniform fin spacing or “bulginess.” By statistically combining nonuniform fin spacing and bulginess into a unique “total channel deviation” parameter, convective transfer penalties and flow pressure drop gains can be predicted. Predictions are supported by experimental measurements.

Copyright © 1977 by ASME
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