Electrohydrodynamic deformation of water surface in a metal pin to water plate corona discharge system
Electrohydrodynamic deformation of water surface in a metal pin to water plate corona discharge system
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DOI：
10.1088/0022-3727/38/6/017
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发表时间：
2005-03
期刊：
影响因子：
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通讯作者：
H. Kawamoto;S. Umezu
中科院分区：
文献类型：
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作者：
H. Kawamoto;S. Umezu
研究了由金属针脚电极和离子导电水电极组成的针脚-板气体放电系统中水面的电水动力变形。在低于电晕阈值的电压条件下，由于产生极小的静电引力（10 μ N左右的库仑力），水在中心向上抬升了几十微米。超过阈值电压时，离子风产生了较大的排斥力，约为100µN。它使中心的水下降了几百微米。如果将水的表面张力和库仑力考虑在内，由测量到的水位变形得到压力分布，则水位变形与金属板电极上的压力分布是一致的。如果施加的电压低于电晕阈值，水电极的总力与针电极的总力一致。在电晕放电时，离子风的反作用力不仅作用于针脚电极，还作用于电极的其他部分，因此在电晕放电时，离子风的反作用力大于针脚电极的反作用力。
Electrohydrodynamic deformation of water surface was investigated in a pin-to-plate gas discharge system that consisted of a pin electrode made of metal and an ion-conductive water electrode. In the condition of a lower applied voltage than the corona threshold, because an extremely small electrostatic attractive force, a Coulomb force in the order of 10 µN, was induced, water lifted up in the order of several tens of micrometres at the centre. Over the threshold voltage corona discharge took place and a relatively large repulsive force, in the order of 100 µN, was induced due to the ionic wind. It depressed water in the order of several hundred micrometres at the centre. Deformation of the water level coincided with the pressure distribution on the metal plate electrode, if the surface tension of water and the Coulomb force was included in the estimation to derive the pressure distribution from the measured deformation of the water level. If the applied voltage was lower than the corona threshold, total force to the water electrode coincided with that to the pin electrode. However, it was larger than that to the pin electrode at the corona discharge because the reaction force due to the ionic wind was applied not only to the pin electrode but also to other parts of the electrode at the corona discharge.