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首页> 外文会议>AIAA aerospace sciences meeting;AIAA SciTech forum >The Effect of Applied Magnetic Field on Arc Spin Rate in High-Pressure Arc Heaters
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The Effect of Applied Magnetic Field on Arc Spin Rate in High-Pressure Arc Heaters

机译：施加磁场对高压电弧炉中电弧自旋速率的影响

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Electric arc-heated facilities typically use an applied magnetic field to cause the arc attachment point to rotate about the electrode surface, thereby preventing the rapid burn-through of the electrode surface. In this work the effect of the applied magnetic field on the spin rate of the arc is studied. First, the anode spin rate for a series of runs of the High Enthalpy Ablation Testing (HEAT) H3 arc heater was measured by installing a high-speed camera looking through a viewing port at the upstream end of the heater and then measuring the spin rate using visual observations of the arc foot location between subsequent frames. Then, the magnetic field applied by the spin coil wrapped around the anode was calculated for the given coil configuration and current using the Biot-Savart Law. The spin rate as a function of the applied electromagnetic force on the arc foot was then determined. Finally, the drag coefficient of the arc column was estimated. The results indicated that the arc column diameter decreases by about a factor of three as the chamber pressure increases from 20 to 60 atm.
机译：电弧加热的设备通常使用施加的磁场使电弧连接点围绕电极表面旋转，从而防止电极表面快速烧穿。在这项工作中，研究了施加的磁场对电弧自旋速率的影响。首先，通过在加热器上游端通过观察口安装高速摄像头，测量一系列高焓烧蚀测试（HEAT）H3电弧加热器的阳极旋转速率使用视觉观察后续帧之间的弧形脚位置。然后，使用Biot-Savart定律针对给定的线圈配置和电流计算出缠绕在阳极周围的自旋线圈施加的磁场。然后确定旋转速度与在电弧脚上施加的电磁力的关系。最后，估算了弧形柱的阻力系数。结果表明，随着腔室压力从20 atm增加到60 atm，电弧塔直径减小了大约三倍。

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