We study the dynamics of the gas flow discontinuities after pulse ionization of a half space in front of a flat shock wave moving in a channel. Pulse volumetric electric discharge initiated in the vicinity of the shock concentrates in front of the shock and heats the gas there. The heating is shown to be very rapid. We use the shadow imaging technique and a high speed camera to study the flow pattern evolution after the discharge. The pattern consists of two shocks separated by a contact surface. This structure corresponds to the classical Riemann problem formulation. Based on the observed pattern, we estimate the amount of discharge energy converted to heat during the discharge time: the rate of temperature increase is in the order of several degrees K per nanosecond.

中文翻译：

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当冲击受到冲击时：冲击波脉冲电离时的黎曼问题动力学

我们研究了在通道中移动的平坦激波前半空间脉冲电离后气流不连续性的动力学。在冲击附近启动的脉冲体积放电集中在冲击前面并加热那里的气体。显示加热非常迅速。我们使用阴影成像技术和高速相机来研究放电后的流型演变。该模式由被接触面隔开的两个冲击组成。这种结构对应于经典的黎曼问题公式。根据观察到的模式，我们估算了在放电时间内转化为热量的放电能量：温度升高的速度约为每纳秒几度 K。