Numerical Study of the Influence of Different Bending Shapes on the Heat Transfer Characteristics of Annular Cross Wavy Primary Surface Recuperator (CW-PSR)

Huadong Jiang, Fu Chen, Chonghai Huang, Jianyang Yu (), Yanping Song and Juanshu Zhang
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Huadong Jiang: School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150006, China
Fu Chen: School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150006, China
Chonghai Huang: Science and Technology on Thermal Energy and Power Laboratory, Wuhan 430205, China
Jianyang Yu: School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150006, China
Yanping Song: School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150006, China
Juanshu Zhang: School of Architecture, Harbin Institute of Technology, Harbin 150006, China

Energies, 2023, vol. 16, issue 24, 1-25

Abstract: The cross-wave primary surface recuperator (CW-PSR) is a dependable option as a recuperator for micro gas turbines (MGT). The micro CW-PSR studied in this paper is composed of 171 stacked curved plates, with each plate containing 33 micro heat transfer channels with equivalent diameters of less than 1 mm. In this study, the influence of bending curvature on the thermal performance of CW-PSR plates is investigated through three-dimensional numerical simulation with fluid–solid–thermal coupling. The results indicate that the variation in bending curvature studied can result in a noteworthy 8% difference in the total heat transfer coefficient of CW-PSR plates. A direct correlation between heat transfer capacity and secondary flow strength is derived mathematically, explaining the mechanism by which secondary flow enhances heat transfer. By employing this relationship, a comprehensive analysis of CW-PSR plates with diverse bending curvatures is conducted, effectively showcasing how curvature influences the secondary flow pattern and enhances the channel’s heat transfer capacity. In addition, this paper considers the comprehensive influence of the size parameters of the heat transfer unit and the bending curvature of the heat transfer plate on the heat transfer and flow characteristics of the CW-PSR, and a dominant mathematical expression is obtained, which can be used for the design of similar heat exchangers of the same type.

Keywords: convective heat transfer; fluid-solid thermal coupling; secondary flow; surrogate model (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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