论文标题
电弧的有限体积模拟：高频交替纵向纵向磁场捏住电弧等离子体
Finite volume simulation of arc: pinching arc plasma by high-frequency alternating longitudinal magnetic field
论文作者
论文摘要
ARC等离子体在许多领域都有有希望的应用。探索其财产是有意义的。本文介绍了基于压力的有限体积模拟的氩气模拟。在建模中，整个阴极区域与电磁计算耦合，以确保阴极表面电流密度的自由变化。在数值解决方案中，选择向对流术语的运输特性，并使用简单（压力链接方程式的半平移方法）算法来求解热压力。通过模拟自由燃烧的氩气，该模型与实验表现出良好的一致性。我们观察到一个有趣的现象，即氩弧在高频交替的纵向磁场上浓缩。与现有的收缩机制不同，这里的ARC通过在收缩和扩展之间的连续过渡来捏合。潜在的机制是，通过与ARC的运动惯性合作，应用的高频交替磁场能够有效扮演“等离子体陷阱”角色，从而导致ARC等离子体被囚禁到较窄的空间中。这可能提供了一种新的收缩弧的方法。
Arc plasmas have promising applications in many fields. To explore their property is of interest. This paper presents detailed pressure-based finite volume simulation of argon arc. In the modeling, the whole cathode region is coupled to electromagnetic calculations to promise the free change of current density at cathode surface. In numerical solutions, the upwind difference scheme is chosen to promise the transport property of convective terms, and the SIMPLE (Semi-Implicit Method for Pressure Linked Equations) algorithm is used to solve thermal pressure. By simulations of the free-burning argon arc, the model shows good agreement with experiment. We observe an interesting phenomenon that argon arc concentrates intensively in the high-frequency alternating longitudinal magnetic field. Different from existing constricting mechanisms, here arc achieves to be pinched through a continuous transition between shrinking and expansion. The underlying mechanism is that via collaborating with arc's motion inertia, the applied high-frequency alternating magnetic field is able to effectively play a "plasma trap" role, which leads the arc plasma to be imprisoned into a narrower space. This may provide a new approach to constrict arc.
