Title: Study on entropy generation in a fully developed turbulent flow through a twisted elliptical tube with constant wall temperature

Authors: Junlin Cheng; Wenjie Bian; Qiang Wang

Addresses: School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212000, China ' School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212000, China ' School of Naval Architecture, Ocean and Energy Power Engineering, Wuhan University of Technology, Wuhan 430063, China

Abstract: This study investigates the generation of entropy in a fully developed turbulent flow through a twisted elliptical tube with a constant wall temperature. The impacts of the dimensionless temperature difference and mass flow rate on entropy production are considered. The influences of the aspect ratio (1.25-5) and twist pitch ratio (5-200) of the twisted elliptical duct are also studied. The results demonstrate that total dimensionless entropy generation increases as the mass flow rate and dimensionless temperature discrepancy increase. The results also illustrate that the geometric configuration of the twisted elliptical duct is an essential factor in influencing entropy generation.

Keywords: entropy generation; exergy efficiency; turbulent flow; twisted elliptical duct; constant wall temperature.

DOI: 10.1504/IJEX.2023.135514

International Journal of Exergy, 2023 Vol.42 No.3, pp.275 - 285

Received: 21 Jun 2023
Accepted: 17 Sep 2023
Published online: 15 Dec 2023 *

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