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首页> 外文期刊>International Journal of Aerodynamics >Pressure, temperature and free-flight projectile-displacement measurements during a plasma discharge generated on a supersonic projectile
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Pressure, temperature and free-flight projectile-displacement measurements during a plasma discharge generated on a supersonic projectile

机译：在超音速弹丸上产生等离子体放电期间的压力，温度和自由飞行弹丸位移测量

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摘要

The generation of a plasma discharge on a projectile surface is a way of producing a pressure imbalance in order to divert a projectile from its initial trajectory. Thus, some experiments dealing with the steering of a supersonic projectile by using a plasma actuator are presented. The plasma discharge is produced by an embedded low-voltage generator capable of delivering a power controlled electric discharge between the electrodes flush with the projectile surface. A series of experiments carried out under wind-tunnel conditions at a Mach number of 3 allows surface-pressure and temperature measurements, which are synchronised with the visualisation of the perturbation evolution along the projectile surface, the disturbance being generated by the plasma discharge. Other series of experiments realised in a shock tunnel under 2.5 km of altitude real conditions at a Mach number of 4.5 demonstrates that a plasma discharge generates the angular deviation of an explosively-formed-projectile model: 120 J of stored energy delivered in 4.5 ms in front of the ogive-cylinder junction of the projectile induces an angle of attack of 11° after the plasma-discharge generation.
机译：在弹丸表面上产生等离子体放电是产生压力不平衡的一种方式，以使弹丸偏离其初始轨迹。因此，提出了一些通过使用等离子体致动器来操纵超音速弹丸的实验。等离子体放电由嵌入式低压发生器产生，该发生器能够在与弹丸表面齐平的电极之间传递功率控制的放电。在风洞条件下以3马赫数进行的一系列实验可以进行表面压力和温度测量，这些测量与沿射弹表面的扰动演变的可视化同步，该扰动是由等离子体放电产生的。在2.5公里高的真实条件下以4.5马赫数的冲击隧道中完成的其他一系列实验表明，等离子放电会产生爆炸性弹丸模型的角度偏差：在4.5毫秒内120焦耳的能量传递产生等离子放电后，弹丸的气-气柱交界处的前部产生11°的迎角。

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