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首页> 外文期刊>High temperature: English translation of teplofizika vysokikh temperatur >Transverse Electric Discharges in Supersonic Air Flows: Space-Time Structure and Current-Voltage Characteristics of Discharge
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Transverse Electric Discharges in Supersonic Air Flows: Space-Time Structure and Current-Voltage Characteristics of Discharge

机译：超音速气流中的横向放电：放电的时空结构和电流-电压特性

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摘要

The space-time evolution of potential distribution in a pulsed transverse discharge in a supersonic jet of air is studied in a mode close to the current generator mode. The current dependences of the longitudinal electric field intensity and of the discharge channel diameter are measured for different values of pressure in the jet. It is demonstrated that the electric field intensity decreases with increasing discharge current by the power law, with the exponent being close to that for a highly contracted glow or arc discharge in the absence of flow. The increase in current is accompanied first of all by an increase in the discharge channel cross section. The characteristics of the oscillatory mode of discharge burning are studied for discharge power supplies which are close to the current generator mode. The obtained dependences of the oscillation period on the external parameters of discharge, namely, current, pressure, and interelectrode spacing, are interpreted. An expression is derived which describes the maximal extent of discharge along the flow in the case of instability due to external electric circuit. This extent may increase further only in the case of transition to supplies close to current generators; in this case, the extent is restricted by the mechanism of repeated breakdown.
机译：以接近电流发生器模式的模式研究了超声速空气射流中脉冲横向放电中电势分布的时空演化。对于射流中的不同压力值，测量纵向电场强度和放电通道直径的电流相关性。已经证明，根据幂定律，电场强度随着放电电流的增加而降低，其指数接近于在没有流动的情况下高度收缩的辉光或电弧放电的指数。电流的增加首先伴随着放电通道横截面的增加。对于接近电流发生器模式的放电电源，研究了放电燃烧的振荡模式的特性。解释所获得的振荡周期对放电的外部参数，即电流，压力和电极间间距的依赖性。导出了一个表达式，该表达式描述了在由于外部电路而导致不稳定的情况下沿流的最大放电程度。仅在过渡到电流发生器附近的电源的情况下，这种程度才可能进一步增加;在这种情况下，程度受到重复击穿机制的限制。

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