Numerical study of conjugated heat transfer in metal foam filled double-pipe |
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| Authors: | YP Du ZG Qu CY Zhao WQ Tao |
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| Affiliation: | 1. State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy & Power Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, China;2. School of Engineering, University of Warwick, Coventry CV4 7AL, UK;1. Institute of Refrigeration and Cryogenics Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;2. Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering, Tsinghua University, Beijing 100084, China;1. School of Energy and Environment, Southeast University, Nanjing 210096, China;2. Institute of Environmental Studies, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8563, Japan;1. National Key Laboratory of Human Factors Engineering, Astronaut Center of China, Beijing 100094, China;2. Key Laboratory of Thermal Fluid Science and Engineering of Ministry of Education, School of Energy and Power Engineering, Xi''an Jiaotong University, Xi''an, Shaanxi 710049, China;1. School of Mechanical, Medical & Process Engineering, Science and Engineering Faculty, Queensland University of Technology, Brisbane 4000, Australia;2. Mechanical Engineering Department, University of California Riverside, CA 93210, USA |
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| Abstract: | The two equation numerical model has been applied for parallel flow double-pipe heat exchanger filled with open cell metal foams. The model fully considered solid–fluid conjugated heat transfer process coupling heat conduction and convection in open cell metal foam solid matrix, interface wall and fluid in both inner and annular space in heat exchanger. The non-Darcy effect and the wall thickness are also taken into account. The interface wall heat flux distribution along the axial direction is predicted. The numerical model is firstly verified and then the influences of solid heat conductivity, metal foam porosity, pore density, relative heat conductivity and inner tube radius of the heat exchanger on dimensionless temperature distribution and heat transfer performance of heat exchanger are numerically studied. It is revealed that the proposed numerical model can effectively display the real physical heat transfer process in the double pipe heat exchanger. It is expected to provide useful information for the design of metal foam filled heat exchanger. |
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