Numerical Simulation on Subcooled Boiling Heat Transfer Characteristics of Water-Cooled W/Cu Divertors

HAN Le (韩乐); CHANG Haiping (常海萍); ZHANG Jingyang (张镜洋); XU Tiejun (许铁军)

doi:10.1088/1009-0630/17/4/16

Plasma Science and Technology > 2015 > 17(4): 347-352. > DOI: 10.1088/1009-0630/17/4/16

HAN Le (韩乐), CHANG Haiping (常海萍), ZHANG Jingyang (张镜洋), XU Tiejun (许铁军). Numerical Simulation on Subcooled Boiling Heat Transfer Characteristics of Water-Cooled W/Cu Divertors[J]. Plasma Science and Technology, 2015, 17(4): 347-352. DOI: 10.1088/1009-0630/17/4/16

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Numerical Simulation on Subcooled Boiling Heat Transfer Characteristics of Water-Cooled W/Cu Divertors

1 College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China 2 Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China

Funds: supported by the National Magnetic Confinement Fusion Science Program of China (No. 2010GB104005), Funding of Jiangsu Innovation Program for Graduate Education (CXLX12 0170), the Fundamental Research Funds for the Central Universities of China

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Received Date: July 07, 2014

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Abstract

Abstract

In order to realize safe and stable operation of a water-cooled W/Cu divertor under high heating condition, the exact knowledge of its subcooled boiling heat transfer characteristics under different design parameters is crucial. In this paper, subcooled boiling heat transfer in a water-cooled W/Cu divertor was numerically investigated based on computational fluid dynamic (CFD). The boiling heat transfer was simulated based on the Euler homogeneous phase model, and local differences of liquid physical properties were considered under one-sided high heating conditions. The calculated wall temperature was in good agreement with experimental results, with the maximum error of 5% only. On this basis, the void fraction distribution, flow field and heat transfer coefficient (HTC) distribution were obtained. The effects of heat flux, inlet velocity and inlet temperature on temperature distribution and pressure drop of a water-cooled W/Cu divertor were also investigated. These results provide a valuable reference for the thermal-hydraulic design of a water-cooled W/Cu divertor.
- water-cooled W/Cu divertor,
- subcooled boiling heat transfer characteristic,
- numerical calculation

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