用于氧化物熔池传热特性研究的感应加热技术

Induction Heating Technology Applied in Heat Transfer Characteristics Study of Molten Oxide Pool

本文分析了冷坩埚感应加热技术对氧化物熔池传热特性研究的适用性,进而对传统冷坩埚的结构进行了改进。使用数值模拟方法对改进后的冷坩埚内部焦耳热和洛伦兹力进行分析,分析结果表明:电源频率越低,焦耳热分布越均匀,同时冷坩埚产生的焦耳热占电源功率的比重越低,越有利于测算熔池壁面的热流密度;相比于熔池自然对流的驱动力,熔池受到电磁场的洛伦兹力可忽略不计,洛伦兹力不会对氧化物熔池的传热和流动产生显著影响。

The applicability of cold-crucible induction heating technology to the experimental study on the heat transfer characteristics of a molten oxide pool was analyzed in this paper.Then improvements on traditional cold-crucible structure were proposed.The intensity and distribution of internal Joule heat and Lorentz force of the improved cold-crucible were analyzed with numerical simulation method.The analysis results show that the distribution of internal Joule heat is more homogeneous with lower electric power frequency,and the Joule heat amount accounts for a smaller share of the total power,which will be benefit to the heat flux measurement of the side wall of the pool.Besides,when compared with the driving force of natural convection in the pool,the Lorentz force can be ignored,which means the Lorentz force has little impact on the heat transfer and the flow behavior of the molten pool.