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TECHNICAL PAPERS: Heat Transfer Enhancement

Characterization of the Effect of Corrugation Angles on Hydrodynamic and Heat Transfer Performance of Four-Start Spiral Tubes

[+] Author and Article Information
X. D. Chen, X. Y. Xu

Department of Chemical and Materials Engineering, The University of Auckland, Private Bag 92019, Auckland, New Zealand

S. K. Nguang

Control Engineering Group, Department of Electrical and Electronic Engineering, The University of Auckland, Private Bag 92019, Auckland, New Zealand

Arthur E. Bergles

Department of Mechanical Engineering, Aeronautical Engineering and Mechanics, Rensselaer Polytechnic Institute, Troy, New York, U.S.A.

J. Heat Transfer 123(6), 1149-1158 (Apr 23, 2001) (10 pages) doi:10.1115/1.1409261 History: Received August 29, 2000; Revised April 23, 2001
Copyright © 2001 by ASME
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References

Figures

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Characteristic parameters of the spirally corrugated tube (the dashed lines are the outlines one would see from the outside of the tube); α is the usual helix angle.
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Schematic diagram of the experimental setup
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Photo of spirally corrugated tubes
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Plot for obtaining the constants C in Eq. (8) for copper tubes at D-2 direction
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Dependence of the Fanning friction factors of spirally corrugated tubes on Reynolds numbers
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Comparison of the friction factors for the tubes no. 2 and no. 35
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Dependence of heat transfer coefficients of spirally corrugated tubes against Reynolds numbers
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Comparison of heat transfer coefficients for tubes no. 2 and no. 35
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Heat transfer enhancement factors for the spirally corrugated tubes
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Comparison between the predicted and the experimental values of C (refer to Eq. (8) and Table 3); the solid line indicates 100 percent agreement.
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Predicted C value as function of α′ and α″ using the neural network model

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