论文标题
非平面电介质在空气中积极流媒体的演变：实验和模拟
Evolution of positive streamers in air over non-planar dielectrics: Experiments and simulations
论文作者
论文摘要
我们研究沿聚碳酸酯介电板的空气中的阳性流媒体，有或没有小规模的表面曲线。 使用光敏感的高速相机和光型型管记录了流媒体的开发，并将实验结果与2D流体流媒体模拟进行了比较。 测试了两个曲线，一个剖面具有0.5 mm深的半圆形波纹，另一个具有0.5 mm深矩形波纹。 使用非封闭式表面作为参考。 实验和模拟都表明表面曲线会导致表面流质较慢，并降低其长度。 矩形切割轮廓比半圆形轮廓更大。 我们发现模拟和实验之间的定量一致性。 对于具有矩形凹槽的表面，模拟还揭示了一种复杂的传播机制，其中新的阳性彩流器重新点燃了表面轮廓波纹。 结果对于涉及流媒体和固体介电的技术应用至关重要。
We study positive streamers in air propagating along polycarbonate dielectric plates with and without small-scale surface profiles. The streamer development was documented using light-sensitive high-speed cameras and a photo-multiplier tube, and the experimental results were compared with 2D fluid streamer simulations. Two profiles were tested, one with 0.5 mm deep semi-circular corrugations and one with 0.5 mm deep rectangular corrugations. A non-profiled surface was used as a reference. Both experiments and simulations show that the surface profiles lead to significantly slower surface streamers, and also reduce their length. The rectangular-cut profile obstructs the surface streamer more than the semi-circular profile. We find quantitative agreement between simulations and experiments. For the surface with rectangular grooves, the simulations also reveal a complex propagation mechanism where new positive streamers re-ignite inside the surface profile corrugations. The results are of importance for technological applications involving streamers and solid dielectrics.
