气流对电弧螺旋不稳定性的影响

The effect of gas flow on the arc helical instability

采用与时间有关的线性微扰理论 ,研究了气流作用下电弧等离子体的螺旋不稳定性 ,导出了相应方程和满足的边界条件 ,给出了临界Maecker’s数和不稳定性增长率等定量结果 .计算结果表明 ,轴向气流对电弧稳定性起重要作用 .

The effect of gas flow on the helical instability is studied by using linear time perturbation theory in this paper, The corresponding equations and the boundary conditions are deduced. The marginal Maecker's number and the growth rate of the helical instability are given. Computational results show that the axial gas flow play the main role on the arc stability.