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首页> 外文会议>Proceedings of the international topical meeting on advanced reactors safety >Crust Formation and Its Effect on Heat Transfer in the Molten Metal Pool
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Crust Formation and Its Effect on Heat Transfer in the Molten Metal Pool

机译：熔液池中结壳的形成及其对传热的影响

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摘要

Experimental and analytical studies have been performed on crust formation and its effect on heat transfer in a molten metal pool. Two types of tests were performed to investigate the effect of coolant conditions. The experimental results on the relationship between the Nusselt number and the Rayleigh number in the molten metal pool were compared with other correlations. The temperature distribution and the heat transfer rate have been evaluated using the FLOW-3D computer program. The present study has shown that the influential parameter in the solidified crust formation process is the bottom surface temperature beneath the molten metal layer in all of the experimental cases due to the developed natural convection flow. An increase of the Rayleigh number leads to an increase of the Nusselt number in the lower molten metal pool. On the contrary, an increase of the Rayleigh number leads to a decrease of the Nusselt number in the upper coolant layer due to the effect of crust as a conducting thermal barrier. The present experimental results on the relationship between the Nusselt number and the Rayleigh number are more similar to Globe and Dropkin's correlation than any others. The FLOW-3D results on the temperature profile and on the heat transfer are agreed with the experimental data.
机译：已对结皮的形成及其对熔融金属池中传热的影响进行了实验和分析研究。进行了两种类型的测试以研究冷却液条件的影响。将熔融金属熔池中Nusselt数与Rayleigh数之间的关系的实验结果与其他相关性进行了比较。温度分布和传热速率已使用FLOW-3D计算机程序进行了评估。本研究表明，在所有实验情况下，由于形成的自然对流，在凝固结壳形成过程中的影响参数是熔融金属层下方的底表面温度。瑞利数的增加导致下部熔融金属池中的努塞尔数增加。相反，由于结壳作为传导热障的作用，瑞利数的增加导致上层冷却剂层中的努塞尔数减少。目前关于Nusselt数与Rayleigh数之间关系的实验结果比其他任何一个都更类似于Globe和Dropkin的相关性。 FLOW-3D在温度分布和传热方面的结果与实验数据一致。

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