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TECHNICAL PAPERS: Forced Convection

Experimental and Numerical Study of Turbulent Heat Transfer in Twisted Square Ducts

[+] Author and Article Information
Liang-Bi Wang, Wen-Quan Tao, Qiu-Wang Wang, Ya-Ling He

School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, PRC

J. Heat Transfer 123(5), 868-877 (Mar 23, 2001) (10 pages) doi:10.1115/1.1389464 History: Received October 03, 2000; Revised March 23, 2001
Copyright © 2001 by ASME
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References

Figures

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Schematic diagram of test ducts: (a) twisted duct with constant cross section; (b) twisted divergent duct; and (c) twisted convergent duct
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Schematic diagram of test apparatus
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Arrangement of thermocouples and pressure taps: (a) thermocouples; and (b) pressure taps
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Schematic diagram of surface area calculation
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Grid systems generated by multi-surface method
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Experimental local heat transfer coefficient
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Experimental local pressure recover factor
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Numerically predicted local heat transfer coefficient (D-1)
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Numerically predicted local heat transfer coefficient (D-2)
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Numerically predicted local heat transfer coefficient (D-3)
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Cross section velocity fields
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Experimental results of average Nusselt number and friction factor
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Numerical results of average Nusselt number and friction factor
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Heat transfer performance comparison

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