THERMAL SCIENCE

International Scientific Journal

Hongzhe Zhai

,

Sasa Gao

,

Wenjie Zhang

,

Yuan Song

,

Xuepeng Gong

,

Dazhuang Wang

,

Qipeng Lu

THE INFLUENCE OF CORRUGATED PIPES PARAMETERS ON HEAT TRANSFER CHARACTERISTICS

ABSTRACT
In order to investigate the influence mechanism of various corrugated structures on the heat transfer of continuous annular concave-convex corrugated pipes, this paper examines the influence of corrugation height (Ch = 1 mm, 1.5 mm, and 2 mm) and corrugation width (Cw = 1 mm, 1.5 mm, and 2 mm) on the flow pattern, turbulent kinetic energy, Nusselt number, friction coefficient, and performance evaluation factor. Then, the correlation equations for Nusselt number and friction coefficient are established with different corrugated structural parameters. The results show that with the increase of Ch, the vortex number, turbulent kinetic energy, and friction coefficient in the pipe increase while Nusselt number decreases. The maximum perfomance evaluation factor is 0.90 at Ch = 1 mm. However, with the increase of Cw, the vortex number and Nusselt number in the pipe increase, while turbulent kinetic energy and friction coefficient in the pipe do not change much. The maximum performance evaluation factor is 0.87 at Cw = 2 mm. Therefore, for this type of corrugated pipe, one should choose a small Ch and a large Cw.
KEYWORDS
corrugated pipes, heat transfer, enhanced heat transfer, numerical simulation
PAPER SUBMITTED: 2023-07-09
PAPER REVISED: 2023-09-18
PAPER ACCEPTED: 2023-09-27
PUBLISHED ONLINE: 2023-11-11
DOI REFERENCE: https://doi.org/10.2298/TSCI230709231Z
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2024, VOLUME 28, ISSUE Issue 1, PAGES [257 - 267]
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The influence of corrugated pipes parameters on heat transfer characteristics

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence