A series of four-start spirally corrugated tubes has been subjected to heat transfer and hydrodynamic testing in a double-pipe heat exchanger. The study has been focused on the non-symmetric nature of the corrugation angles along the longitudinal direction. Both friction factors and heat transfer coefficients inside the tubes have been correlated against various process parameters. It can be shown that by altering the internal non-symmetric wavy shapes of the tubes, one is able to manipulate heat transfer and friction characteristics. The experimental results have been compared with some popular correlation models developed previously for both friction and heat transfer for corrugated tubes. Considerable differences between the experimental results and the predictions made using the existing correlations have been found and the probable causes have been discussed. Performance evaluation criteria are presented using the standard constant power criterion. A neural network modeling approach has been taken so that, based on the limited data, one can generate the contour showing the effect of corrugation angle on heat transfer coefficient for geometry optimization purposes.
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Characterization of the Effect of Corrugation Angles on Hydrodynamic and Heat Transfer Performance of Four-Start Spiral Tubes
X. D. Chen,
X. D. Chen
Department of Chemical and Materials Engineering, The University of Auckland, Private Bag 92019, Auckland, New Zealand
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X. Y. Xu,
X. Y. Xu
Department of Chemical and Materials Engineering, The University of Auckland, Private Bag 92019, Auckland, New Zealand
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S. K. Nguang,
S. K. Nguang
Control Engineering Group, Department of Electrical and Electronic Engineering, The University of Auckland, Private Bag 92019, Auckland, New Zealand
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Arthur E. Bergles
Arthur E. Bergles
Department of Mechanical Engineering, Aeronautical Engineering and Mechanics, Rensselaer Polytechnic Institute, Troy, New York, U.S.A.
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X. D. Chen
Department of Chemical and Materials Engineering, The University of Auckland, Private Bag 92019, Auckland, New Zealand
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.
Contributed by the Heat Transfer Division for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received by the Heat Transfer Division August 29, 2000; revision received April 23, 2001. Associate Editor: B. T. F. Chung.
J. Heat Transfer. Dec 2001, 123(6): 1149-1158 (10 pages)
Published Online: April 23, 2001
Article history
Received:
August 29, 2000
Revised:
April 23, 2001
Citation
Chen , X. D., Xu, X. Y., Nguang, S. K., and Bergles, A. E. (April 23, 2001). "Characterization of the Effect of Corrugation Angles on Hydrodynamic and Heat Transfer Performance of Four-Start Spiral Tubes ." ASME. J. Heat Transfer. December 2001; 123(6): 1149–1158. https://doi.org/10.1115/1.1409261
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