Heat Transfer and Friction Factor Studies in a Circular Tube Fitted with Twisted Tape Consisting of Wire-nails

P. Murugesan; K. Mayilsamy; S. Suresh

doi:10.1016/S1004-9541(09)60166-X

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Heat Transfer and Friction Factor Studies in a Circular Tube Fitted with Twisted Tape Consisting of Wire-nails

Updated：2026-01-06

- Heat Transfer and Friction Factor Studies in a Circular Tube Fitted with Twisted Tape Consisting of Wire-nails
- Chinese Journal of Chemical Engineering Vol. 18, Issue 6, Pages: 1038-1042(2010)
- Affiliations：
  
  1. Department of Mechanical Engineering, K.S. Rangasamy College of Technology, Tiruchengode,India,637215
  2. Department of Mechanical Engineering, Institute of Road and Transport Technology, Erode,India,638316
  3. Department of Mechanical Engineering, National Institute of Technology, Tiruchirappalli,India,620015
- Author bio：
- Funds：
- DOI：10.1016/S1004-9541(09)60166-X
  CLC：
- Published：2010
- Accepted：
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P. Murugesan, K. Mayilsamy, S. Suresh. Heat Transfer and Friction Factor Studies in a Circular Tube Fitted with Twisted Tape Consisting of Wire-nails[J]. , 2010, 18(6): 1038-1042.
DOI：

P. Murugesan, K. Mayilsamy, S. Suresh. Heat Transfer and Friction Factor Studies in a Circular Tube Fitted with Twisted Tape Consisting of Wire-nails[J]. , 2010, 18(6): 1038-1042. DOI： 10.1016/S1004-9541(09)60166-X.

摘要

Abstract

This paper deals with the experimental investigation on Nusselt number

friction factor and thermal enhancement factor of a double pipe heat exchanger equipped with twisted tape consisting wire nails(WN-TT) and plain twisted tapes(P-TT) with three different twist ratios of

=2.0

4.4 and 6.0. Test runs are conducted using the water as the working fluid with Reynolds number range between 2000 and 12000 for WN-TT and P-TT. It is found that Nusselt number

friction factor and thermal enhancement factor in the tube equipped with WN-TT appreciably higher than those in the tube fitted with P-TT and plain tube. Over the range considered Nusselt number

friction factor and thermal enhancement factor in a tube with WN-TT are respectively

1.08 to 1.31

1.1 to 1.75 and 1.05 to 1.13 times of those in tube with P-TT. The better performance of WN-TT is due to combined effects of the following factors:(1) common swirling flow generated by P-TT

(2) additional turbulence offered by the wire nails. Empirical correlations for Nusselt number

friction factor and thermal enhancement factor are also formulated from the experimental results of WN-TT and P-TT.

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