Transactions of Nanjing University of Aeronautics & Astronautics
Enhanced Pool Boiling Heat Transfer on Copper Foam Welded Surfaces
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Abstract:
Enhanced pool boiling heat transfer of the porous structure is critical to the thermal management technology. In this paper， pool boiling heat transfer experiments are performed on copper foam welded surfaces in de-ionized water to investigate the effects of basic parameters of copper foam on heat transfer enhancement. Boiling phenomenon is observed to facilitate the understanding of enhancement mechanism. The results show that copper foam welded surfaces can significantly enhance the pool boiling heat transfer performance， reduce the boiling incipience temperature by 7-9 ℃ ， and reach two times heat transfer coefficient compared with smooth plain surfaces due to numerous nucleation sites， extended surface areas， and enhanced turbulent effect. Pore density and thickness of foam have two side effects on heat transfer.
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This work was supported by the National Natural Science Foundation of China （No.52075249）， and the Foundation of Jiangsu Key Laboratory of Bionic Functional Materials（No. NJ2020026）.
Clc Number:
TB61
CHINA AERO-SCIENCES
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