基于多物理环境顺序耦合法的联合弧特性分析

Characteristics analysis of combined plasma arc based on sequential coupling method of physics environment approach

由于转移弧和非转移弧的并存以及电、磁、热、流等物理现象的复杂耦合作用,使得传统数值方法分析联合弧射流特性较为困难.依据磁流体动力学和电磁学理论建立联合型等离子体弧的三维数学模型,利用物理环境顺序耦合法对多场复杂耦合的联合弧进行有限元迭代计算,并分析工作电流、气体流量相关工艺参数对联合弧射流温度特性的影响.结果表明,联合型等离子体弧射流特性的仿真结果与检测结果基本相符,其分布规律以及同工艺参数间的关系有着自己显著的特点.

According to the features of combined plasma arc and the theory of magnetic fluid dynamics and electromagnetics,which exists a coexistence of transferred arc and non-transferred arc and an interaction of electric field,magnetic field,thermal field and flow field,a three-dimensional mathematical model was developed.The effects of working current and gas flow on the distribution of jet temperature of the combined plasma arc were analyzed by finite element software ANSYS and sequential coupling method.The results show that the simulation value with this model is consistent with the measured value.