Numerical analysis on interactions between fluid flow and structure deformation in plate-fin heat exchanger by Galerkin method
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The fluid-structure interaction performance of plate-fin heat exchanger (PFHE) with serrated fins in large scale air-separation equipment was investigated in this paper. The stress and deformation of fins were analyzed, besides, the interaction equations were deduced by Galerkin method. The governing equations of fluid flow and heat transfer in PFHE were deduced by finite volume method (FVM). The distribution of strain and stress were calculated in large scale air separation equipment and the coupling situation of serrated fins under laminar situation was analyzed. The results indicated that the interactions between fins and fluid flow in the exchanger have significant impacts on heat transfer enhancement, meanwhile, the strain and stress of fins includes dynamic pressure of the sealing head and flow impact with the increase of flow velocity. The impacts are especially significant at the conjunction of two fins because of the non-alignment fins. It can be concluded that the soldering process and channel width led to structure deformation of fins in the exchanger, and degraded heat transfer efficiency.
This paper is supported by the National Natural Science Foundation of China (No. 51705297) and Natural Science Foundation of Shandong Province, China (Grant No. ZR2016EEP09). Besides, we would also like to show our appreciation to Mr. WEI Zhenwen, the chairman of Doright Corporation, for his kindly help during the leading flow and enhanced heat transfer experiment period.
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Conflict of interest
The authors have no financial or other relationship that might be perceived as leading to a conflict of interest that could affect authors’ objectivity. Besides, this manuscript has not been published elsewhere and it has not been submitted simultaneously for published elsewhere.
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