Local Heat Transfer and Pressure Drop for Finned-Tube Heat Exchangers Using Oval Tubes and Vortex Generators

[+] Author and Article Information
James E. O’Brien, Manohar S. Sohal, Philip C. Wallstedt

Idaho National Engineering and Environmental Laboratory, Idaho Falls, Idaho 83415

J. Heat Transfer 126(5), 826-835 (Nov 16, 2004) (10 pages) doi:10.1115/1.1795239 History: Received November 07, 2003; Revised May 11, 2004; Online November 16, 2004
Copyright © 2004 by ASME
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Winglet locations and geometry
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Pressure-drop test section core
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Experimental uncertainties
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Local fin surface heat transfer coefficients for an oval tube plus a single winglet pair
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Local fin-surface heat transfer distributions for flow around an elliptical tube with two pairs of delta winglets in a staggered configuration
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Mean fin-surface Nusselt numbers for seven flow configurations, based on local heat transfer results
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Friction factors measured for six flow configurations, steady-state and blow-down results




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