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Journal of Enhanced Heat Transfer

Founding Advisory Editor: Arthur E. Bergles (open in a new tab)

Published 8 issues per year

ISSN Print: 1065-5131

ISSN Online: 1563-5074

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THERMOHYDRAULICS OF TURBULENT FLOW THROUGH SQUARE AND RECTANGULAR DUCTS WITH TRANSVERSE RIBS AND TWISTED TAPES WITH AND WITHOUT OBLIQUE TEETH

Volume 18, Issue 4, 2011, pp. 281-293
DOI: 10.1615/JEnhHeatTransf.v18.i4.30
Submitted: Jan 16 2011 Accepted: Jan 16 2011 Published online: Jun 22 2011
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Sujoy Saha (Corresponding author sujoy_k_saha@hotmail.com)
Department of Mechanical Engineering, Indian Maritime University, Kolkata Campus, Kolkata- 700088, ( A central University, Govt. of India)

ABSTRACT

Thermal and friction characteristics of turbulent flow through square and rectangular ducts with periodic transverse ribs and different types of twisted tapes with and without oblique teeth have been studied experimentally. Circular ducts have also been used. Correlations for predicting the friction factor and the Nusselt number have been developed and performance has been evaluated. Although both the friction factor and the Nusselt number are higher for all types of twisted tapes with oblique teeth in combination with transverse ribs, the performance evaluation has shown that the ducts with transverse ribs and regularly spaced twisted-tape elements with oblique teeth are better than those in the case without oblique teeth and this is recommended. Also, since the pressure drop in a heat exchanger is a small fraction of the total system pressure drop, the heat transfer being higher, full-length and short-length twisted tapes with oblique teeth in combination with transverse ribs can be recommended since the heat exchanging surface area requirement will be less.

KEY WORDS: turbulent swirl flow, forced convection, transverse ribs, twisted tape, square and rectangular ducts, oblique teeth
CITED BY

  1. Man Changzhong, Wang Chong, Yao Jinyu, The current situation of the study on twisted tape inserts in pipe exchangers, Journal of Marine Science and Application, 13, 4, 2014. Crossref

  2. Pal Sagnik, Saha Sujoy Kumar, Laminar fluid flow and heat transfer through a circular tube having spiral ribs and twisted tapes, Experimental Thermal and Fluid Science, 60, 2015. Crossref

  3. Pal Sagnik, Saha Sujoy Kumar, Laminar flow and heat transfer through a circular tube having integral transverse corrugations and fitted with centre-cleared twisted-tape, Experimental Thermal and Fluid Science, 57, 2014. Crossref

  4. Pal Sagnik, Saha Sujoy Kumar, Experimental investigation of laminar flow of viscous oil through a circular tube having integral axial corrugation roughness and fitted with twisted tapes with oblique teeth, Heat and Mass Transfer, 51, 8, 2015. Crossref

  5. Roy Sarbendu, Saha Sujoy Kumar, Thermal and friction characteristics of laminar flow through a circular duct having helical screw-tape with oblique teeth inserts and wire coil inserts, Experimental Thermal and Fluid Science, 68, 2015. Crossref

  6. Bhattacharyya Suvanjan, Fluid Flow and Heat Transfer in a Heat Exchanger Channel with Short-Length Twisted Tape Turbulator Inserts, Iranian Journal of Science and Technology, Transactions of Mechanical Engineering, 44, 1, 2020. Crossref

  7. Emani Madhu Sruthi, Ranjan Hrishiraj, Bharti Anand Kumar, Meyer Josua P., Saha Sujoy Kumar, Laminar flow heat transfer enhancement in square and rectangular channels having: (1) A wire-coil, axial and spiral corrugation combined with helical screw-tape with and without oblique teeth and a (2) spiral corrugation combined with twisted tapes with oblique teeth, International Journal of Heat and Mass Transfer, 144, 2019. Crossref

  8. Tiwari Manvendra, Saha Sujoy Kumar, Laminar Flow Through a Circular Tube Having Transverse Ribs and Twisted Tapes, Journal of Thermal Science and Engineering Applications, 7, 4, 2015. Crossref

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