Surface waves on an oil film driven by corona-induction

T.S. Lee
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引用次数: 2

Abstract

The first demonstration of the creation of expanding circular waves an a precharged oil film spread over a flat dielectric surface used a triggering scheme of sudden grounding of the corona point. Wave initiation by the more general potential-switching method has been explored since. We introduce here a second independent experimental scheme of triggering which can be effective if pre-charging has been by a corona source and if charging level is sufficiently moderate: By switch-reducing the point potential far enough to cause corona-cessation first and then mechanically but impulsively lower the point tip near to the surface of the oil film, sudden wave initiation is invariably encountered in the process when the separation setting is below a threshold. As to the resulting surface characteristics, all essential observations resemble those associated with waves produced with the first scheme except that in a typical event expansion would ultimately cease after initial front propagation. Thus, temporal disturbance affects a maximum but finite size domain only. In this report, details from representative triggering results are presented.
由电晕感应驱动的油膜表面波
在平面电介质表面上铺展的预充油膜上产生膨胀的圆波的第一个演示使用了电晕点突然接地的触发方案。从那时起,人们开始探索更普遍的电位开关法引发波。我们在此介绍第二种独立的触发实验方案,如果通过电晕源进行预充电并且充电水平足够适中,则该方案可以有效:通过开关将点电位降低到足够远,首先导致电晕停止,然后机械地但冲动地降低靠近油膜表面的点尖端,当分离设置低于阈值时,在过程中不可避免地遇到突然的波起爆。至于所得到的表面特征,除了在一个典型的事件中,膨胀将在最初的锋面传播后最终停止外,所有的基本观测结果都与第一种方案产生的波有关。因此,时间扰动只影响一个最大但有限大小的域。在本报告中,详细介绍了具有代表性的触发结果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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