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TECHNICAL PAPERS: Heat and Mass Transfer

Local and Average Characteristics of Heat/Mass Transfer Over Flat Tube Bank Fin With Four Vortex Generators per Tube

[+] Author and Article Information
L. B. Wang, F. Ke, S. D. Gao, Y. G. Mei

Department of Mechanical Engineering, Lanzhou Railway Institute, Lanzhou, Gansu 730070, P. R. of China

J. Heat Transfer 124(3), 546-552 (May 10, 2002) (7 pages) doi:10.1115/1.1423905 History: Received December 15, 2000; Revised September 24, 2001; Online May 10, 2002
Copyright © 2002 by ASME
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References

Figures

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Schematic view of flat tube bank fin arrays embedded with vortex generators
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Experimental setup: (a) flow passages; (b) measured plate supporting; (c) plate constructing flow passage; (d) fin surface I; (e) fin surface II; (f) flat tube cast from naphthalene; (g) flat tube bank parameters and positions of vortex generators; and (h) geometry of vortex generator.
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Validation of experimental method
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Comparison of local Nu distribution on fin surfaces: (a) fin surface I, without VGs enhancement Re=2681, Tp=5 mm; (b) fin surface II, with VGs enhancement Re=2739, Tp=5 mm, θ=35 deg, H/tp=0.8; and (c) fin surface I, with VGs enhancement Re=2739, Tp=5 mm, θ=35 deg, H/tp=0.8.
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Cross section position labels for local Nu number presentation
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Comparison of span wise local Nu on fin surfaces
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Comparison of span wise average Nu along streamwise
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Effect of attack angle on the average Nu and f
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Effect of relative height of vortex generator on the average Nu and f
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Effect of fin spacing on the average Nu and f

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