Structural optimization of corrugated bidirectional slotted fin-tube heat exchanger

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Structural optimization of corrugated bidirectional slotted fin-tube heat exchanger

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[1]ZHANG Boqiang,ZHANG Meiyue,GUO Wenming,et al.Structural optimization of corrugated bidirectional slotted fin-tube heat exchanger[J].Journal of Zhengzhou University (Engineering Science),2027,48(XX):1-8.[doi:10. 13705/ j. issn. 1671-6833. 2026. 03. 006]

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Journal of Zhengzhou University (Engineering Science)[ISSN 1671-6833/CN 41-1339/T] Volume: 48 Number of periods: 2027 XX Page number: 1-8 Column: Public date: 2027-12-10

Title:: Structural optimization of corrugated bidirectional slotted fin-tube heat exchanger

Author(s):: ZHANG Boqiang¹, ZHANG Meiyue¹, GUO Wenming², ZHAO Han ¹, GUO Xiaojing¹, SONG Ke³; 1. School of Mechanical and Electrical Engineering, Henan University of Technology, Zhengzhou 450001, China; 2. Zhengzhou Xinjiye Automotive Electronics Co., Ltd, Zhengzhou 450000, China; 3. School of Automotives Studies, Tongji University, Shanghai 200092, China

Keywords:: finned tube heat exchanger; slotted fin; heat transfer performance; resistance characteristics; orthogonal experiment

CLC:: TK124

DOI:: 10. 13705/ j. issn. 1671-6833. 2026. 03. 006

Abstract:: In order to solve the problem that the flow resistance of slotted fin-tube heat exchanger increases significantly during the process of realizing high efficiency heat transfer, a corrugated bidirectional slotted fin structure was designed in this study. Numerical simulation methods were used to validate the performance of the corrugated bidirectional slotted fins. The flow and heat transfer characteristics on the surface of unslotted fins, slotted fins, and elliptical tube slotted fins were compared and analyzed. The effects of three structural parameters, namely fin pitch, slot height, and the ratio of the long axis to the short axis of an ellipse, on the flow, heat transfer, and resistance performance of the corrugated bidirectional slotted fin-tube heat exchanger were thoroughly investigated. Based on these three structural parameters, the comprehensive heat transfer performance index Nu/f1/3 was selected as the optimization objective. An orthogonal experiment was conducted to optimize the design of the corrugated bidirectional slotted fin structure, and a comparative analysis of the heat transfer performance between the optimized and unslotted fin-tube heat exchangers was performed. The results showed that within the Reynolds number range of Re = 650 -5 245, the air-side Nusselt number and friction factor increased as tf or e decreased, and as ts increased. Within the studied range, the influence of the parameters on the optimization objective Nu/f1/3 was followed the order : tf > e > ts. The optimal structural parameters were determined to be a fin pitch tf of 2.1 mm, a slot height ts of 1.0 mm, and an elliptical axis ratio e of 1.5. Compared with the unslotted fin-tube heat exchanger, the optimized corrugated bidirectional slotted fin-tube heat exchanger achieved an average increase of 9.18% in Nu/f1/3, significantly enhancing the comprehensive heat transfer performance. This study contributed to promoting the application of slotted structures on corrugated fins and provided data support for the optimal design of corrugated bidirectional slotted fin-tube heat exchangers

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Last Update: 2026-06-12