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Licensed Unlicensed Requires Authentication Published by De Gruyter February 14, 2022

Study of a perforated hollow cylinder and twisted tape inserts as a compound device in a circular tube for heat transfer enhancement

Rahul Kumar, Siddharth, Manoj Kumar, Anil Kumar Patil ORCID logo and Sunil Chamoli
From the journal Kerntechnik

Abstract

In the present study, the effect of perforated hollow cylinders and twisted tapes on fluid flow and heat transfer behavior of a circular tube is presented for the Reynolds number (Re) range of 6000–40,000. The diametrical ratio (DR) and perforation index (PI) of compound devices are varied to determine the Nusselt number (Nu) and friction factor (f) for the combined perforated hollow cylinder (PHC) and twisted tape (TT) insert. The maximum value of Nusselt number ratio is found to be 3.19 and the minimum value of the friction factor ratio is obtained as 2.24. The PHC–TT combination provides the maximum thermal enhancement factor (TEF) of 2.43 for PI = 8%, and DR = 0.5.


Corresponding author: Anil Kumar Patil, Department of Mechanical Engineering, DIT University, Dehradun 248009, Uttarakhand, India, E-mail:

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: None declared.

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Received: 2021-09-29
Published Online: 2022-02-14
Published in Print: 2022-04-26

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