Charging of droplets by impulse corona
Charging of droplets by impulse corona
复制标题
通过脉冲电晕使液滴带电
DOI：
10.1029/jc075i024p04483
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发表时间：
1970
影响因子：
--
通讯作者：
B. Vonnegut
中科院分区：
文献类型：
--
作者：
C. T. Phelps;B. Vonnegut
描述了在从甘油和水的溶液中雾化的液滴云中产生两极脉冲电晕的实验。观察到半径在2.515μ范围内的液滴的电荷特征是，如果其他电学和几何参数固定，最大表面电荷密度几乎不变，降至约6μ，且半径低于该值时，表面电荷密度增加。观察到半径大于6μ的液滴的最大表面电荷密度，正电晕约为4×10−6−-2，负电晕约为−6×10−6-−2。我们的结果表明，这两种电晕的充电机制截然不同。在正电晕的情况下，液滴的电荷似乎是正流光和液滴之间直接相互作用的结果。这些发现表明闪电放电和随后的云滴快速增长之间可能存在联系。
Experiments involving the production of impulse corona of both polarities within a cloud of droplets atomized from a solution of glycerin and water are described. The observed charging of droplets with radii in the range 2.5 to 15 μ is characterized by a maximum surface charge density that is nearly constant down to about 6 μ and increases for radii below that if other electric and geometric parameters are fixed. The largest surface charge densities observed for droplets with radii above 6 μ are approximately 4×10−6 coul m−2 for positive corona and −6×10−6 coul m−2 for negative corona. Our results suggest quite different charging mechanisms for the two corona polarities. With positive corona the droplet charging appears to result from direct interaction between the positive streamers and the droplets. These findings indicate a possible link between the lightning discharge and subsequent rapid cloud droplet growth.