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https://hdl.handle.net/2440/80012
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Type: | Journal article |
Title: | Heat transfer and friction factor characteristics in turbulent flow through a tube fitted with perforated twisted tape inserts |
Author: | Bhuiya, M. Chowdhury, M. Saha, M. Islam, M. |
Citation: | International Communications in Heat and Mass Transfer, 2013; 46:49-57 |
Publisher: | Pergamon-Elsevier Science Ltd |
Issue Date: | 2013 |
ISSN: | 0735-1933 1879-0178 |
Abstract: | This work deals with the experimental investigation on Nusselt number, friction factor and thermal performance factor in a circular tube equipped with perforated twisted tape inserts with four different porosities of Rp = 1.6, 4.5, 8.9 and 14.7%. The experiments were conducted in a turbulent flow regime with Reynolds number ranging from 7200 to 49,800 using air as the working fluid under uniform wall heat flux boundary condition. The experimental results revealed that both heat transfer rate and friction factor of the tube fitted with perforated twisted tapes were significantly higher than those of the plain tube. Over the range investigated, Nusselt number, friction factor and thermal performance factor in the tube with perforated twisted tape inserts was found to be 110 -340, 110 -360 and 28-59% higher than those of the plain tube values, respectively. In addition, the empirical correlations of Nusselt number, friction factor and thermal performance factor were formulated from the experimental results of tape inserts. © 2013 Elsevier Ltd. |
Keywords: | Perforated twisted tape insert Nusselt number Friction factor Thermal performance factor |
Rights: | Copyright © 2013 Elsevier Ltd. All rights reserved. |
DOI: | 10.1016/j.icheatmasstransfer.2013.05.012 |
Published version: | http://dx.doi.org/10.1016/j.icheatmasstransfer.2013.05.012 |
Appears in Collections: | Aurora harvest Mechanical Engineering publications |
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