Heat Transfer and Flow Resistance in Crossflow over Corrugated Tube Banks

Yuzhou Zhong, Jingquan Zhao, Lei Zhao, Ge Gao and Xiaowei Zhu ()
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Yuzhou Zhong: School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China
Jingquan Zhao: School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China
Lei Zhao: School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China
Ge Gao: School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China
Xiaowei Zhu: School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China

Energies, 2024, vol. 17, issue 7, 1-15

Abstract: The engineering of tubes with surface corrugations is recognized as an effective method for enhancing heat transfer within the tube. Yet the impact of surface corrugation on the flow and heat transfer around the tube’s exterior remains inadequately explored. This study investigates the crossflow and heat transfer characteristics in banks of periodically inward-corrugated tubes using computational fluid dynamics. Numerical simulations were performed for both in-line and staggered tube arrangements, covering Reynolds numbers from 1000 to 10,000. The aim was to examine how various corrugation parameters affect heat transfer and flow dynamics in tube banks configured in both in-line and staggered layouts. The results show that the heat transfer and the pressure drop in crossflow across tube banks are substantially influenced by changes in corrugation parameters. Specifically, in the in-line arrangement, both the Nusselt number and Euler number decrease significantly as the corrugation height increases. In contrast, in the staggered arrangement, the Nusselt number and Euler number exhibit less variation in response to surface corrugation. A comparative analysis of performance criteria suggests that a staggered arrangement is more advantageous for improving thermal–hydraulic efficiency in crossflow through corrugated tube banks.

Keywords: tube bank; corrugated tube; crossflow; in-line and staggered arrangements; computational fluid dynamics (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: 2024
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