Heat transfer enhancement by flow-induced vibration in heat exchangers |
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| Authors: | L. Cheng T. Luan W. Du M. Xu |
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| Affiliation: | 1. Université de Toulouse, UPS, INPT, LAPLACE (Laboratoire Plasma et Conversion d’Energie), 118 route de Narbonne, F-31062 Toulouse Cedex 9, France;2. CNRS, LAPLACE, F-31062 Toulouse, France;3. Université de Toulouse, UPS, INPT, LAPLACE (Laboratoire Plasma et Conversion d’Energie), 2, rue Charles Camichel BP 7122, F-31071 Toulouse Cedex 7, France;4. Aix-Marseille Université-CNRS Laboratoire IUSTI, UMR 7743, 5 Rue Enrico Fermi, Marseille 13453, France;1. Mechanical Engineering Department, São Carlos School of Engineering, University of São Paulo, Av. Trabalhador São Carlense, 400, Parque Arnold Schmidt, São Carlos, São Paulo, CEP 13566-590, Brazil;2. Federal Fluminense University, Brazil;3. Heat Transfer Research Group, Brazil;1. School of Engineering, University of Guelph, Guelph, Ontario N1G 2W1, Canada;2. Operational Engineering Assessment Division, Canadian Nuclear Safety Commission, Ottawa, Ontario K1P 5S9, Canada;1. Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran;2. Modern Manufacturing Technologies Research Center, Najafabad Branch, Islamic Azad University, Najafabad, Iran;3. Foolad Institute of Technology, Fouladshahr, Isfahan, Iran |
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| Abstract: | The flow-induced vibration in heat exchanger is usually considered as a detrimental factor for causing the heat exchanger damage and is strictly prevented from its occurrence. Its positive role for the possible heat transfer enhancement has been neglected. In this article a novel approach is proposed to enhance the heat transfer by using the flow-induced vibration of a new designed heat transfer device. Thus the flow-induced vibration is effectively utilized instead of strictly avoiding it in the heat exchanger design. A heat exchanger is constructed with the new designed heat transfer devices. The vibration and the heat transfer of these devices are studied numerically and experimentally, and the correlation of the shell-side convective heat transfer coefficient is obtained. It is found that the new designed heat exchanger can significantly increase the convective heat transfer coefficient and decrease the fouling resistance. Therefore, a lasting heat transfer enhancement by the flow-induced vibration can be achieved. |
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