This paper derives the mathematical express on of the pressure of vacuum arc subjected to an axial magnetic field under stationary model and the assumption of local thermodynamic equilibrium etc.

本文在稳态模型和局域热力学平衡等假设下，推导了在纵向磁场下真空电弧压力的数学表达式。

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Also the curves can express the circle arc and ellipse arc and can construct rotate surfaces.

同时它还能精确表示圆弧、椭圆弧等二次曲线，推广到空间即可以表示旋转曲面。

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Based on thermodynamics and considerations of the influence of arc, the equations to express the behaviour of gas flow with the arc is solved by numerical method.

根据热力学理沦并考虑到电弧的作用，运用数值运算方法对灭弧室气流的解析方程进行了计算。

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