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Heat transfer enhancement by helical screw tape coupled with rib turbulators

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Abstract

The influence of helical screw tape coupled with rib turbulators (HST-R) on thermohydraulic characteristics in a circular tube has been experimentally investigated. The experiments were performed under constant heat flux condition for Reynolds number between 6,000 and 20,000. The rib-pitch ratio (p/D) was varied from 1.0 to 3.0 while rib-height ratio (e/W) was varied from 0.5 to 1.5. The experimental results revealed that heat transfer and friction factor increase with increasing rib-height ratio (e/W) and decreasing rib-pitch ratio (p/D). For the range examined, the HST-Rs with moderate rib-pitch ratio (p/D = 2) and the largest rib-height ratio (e/W = 1.5) gave the maximum thermal performance factor while HST possessed thermal performance factor around average value of those of the tubes with HSTRs. The developed empirical correlations for Nusselt number, friction factor and thermal performance factor gave the predictions within ±4.4%, ±13% and ±4.2%, respectively as compared to the experimental data.

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Author information

Authors and Affiliations

  1. Faculty of Engineering, Mahanakorn University of Technology, Bangkok, 10530, Thailand

    Kwanchai Nanan & Smith Eiamsa-ard

  2. Faculty of Engineering, King Mongkut’s Institute of Technology Ladkrabang, Bangkok, 10520, Thailand

    Monsak Pimsarn & Chinaruk Thianpong

Authors
  1. Kwanchai Nanan
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  2. Monsak Pimsarn
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  3. Chinaruk Thianpong
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  4. Smith Eiamsa-ard
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Corresponding author

Correspondence to Smith Eiamsa-ard.

Additional information

Recommended by Associate Editor Dae Hee Lee

Kwanchai Nanan is currently a D.Eng. candidate in the Department of Mechanical Engineering at Mahanakorn University of Technology. He received his M.Eng. and B.Eng. degrees from Mahanakorn University of Technology in 2006 and 2009, respectively. Mr. Nanan has been working at Mahanakorn University of Technology since 2007. His research interests include heat transfer enhancement in channels/tubes, impingement jet and film jet cooling in gas turbine.

Monsak Pimsarn is currently an Assistant Professor in Department of Mechanical Engineering, Faculty of Engineering, King Mongkut’s Institute of Technology Ladkrabank, (KMITL) Thailand. He hold a Bachelor of Engineering degree in Mechanical Engineering from KMITL, a Master of Science in Mechanical Engineering degree from the Vanderbilt University (Nashville, Tennessee), and a Doctor of Philosophy in Mechanical Engineering from University of Connecticut at Storrs.

Chinaruk Thianpong received the B.Eng. (Mechanical Engineering) from King Monkut’s Institute of Technology Ladkrabang (KMITL), Thailand in 1991, MSc. (Mechanical Engineering) and Ph.D. (Mechanical Engineering) from University of Manchester in 1998. Nowadays, he is a lecturer in Department of Mechanical Engineering, KMITL. His researches are about thermo-fluid, heat transfer and energy conservation.

Smith Eiamsa-ard is an Associate Professor in the Department of Mechanical Engineering at Mahanakorn University of Technology. He received his D.Eng. degree in Mechanical Engineering from King Mongkut’s Institute of Technology Ladkrabang. He has been working at Mahanakorn University of Technology since 1996. He has co-authored more than 95 International Journal publications. His research interests are in the topic of heat transfer enhancement with active/passive technique, flow visualization techniques, and computational fluid dynamics.

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Nanan, K., Pimsarn, M., Thianpong, C. et al. Heat transfer enhancement by helical screw tape coupled with rib turbulators. J Mech Sci Technol 28, 4771–4779 (2014). https://doi.org/10.1007/s12206-014-1044-z

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  • DOI: https://doi.org/10.1007/s12206-014-1044-z

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