中频炉电磁搅拌磁流耦合场数值仿真

Magnetic-Flow Coupled Field Numerical Simulation of Electromagnetic Stirring in Medium Frequency Furnace

中频感应炉内炉料升温熔融,熔液在电磁力的作用下产生有规律的运动。从炉液运动规律入手,建立磁-流耦合场数学模型,并利用通用有限元软件ANSYS对其进行求解。从模拟结果可以得出金属熔液在电磁力作用下的液面形状-"驼峰"和流动路径。通过控制变量法,得出电源功率、电源频率和金属液电阻率等工艺参数的变化对电磁搅拌力和搅拌强度的影响。得出在设定条件下,电磁搅拌力和搅拌强度与电源功率、电源频率、金属液电阻率的具体数值关系,从而为中频炉工艺参数选定提供理论依据。

With the temperature rising, the solid metal in the medium frequency induction furnace is melted, it will have regular exercise in the effect of electromagnetic force. The mathematical model for magnetic-flow coupled field of the molten metal was established and solved by the use of the ANSYS software. The simulation results show that the flow path and the surface shape（like ＂hump＂） of the molten liquid in the furnace can be obtained under the effect of electromagnetic force. By controlling variables, the influences of the change of the process parameters such as power, power supply frequency and the metal liquid resistance on the force and strength of electromagnetic stirring can be gotten. And the numerical relationship between the electromagnetic stirring force and these process parameters such as power, power supply frequency and the metal liquid resistance can be also gotten. So this can provide a theoretical basis for selecting process parameters of the medium frequency furnace.