Studies of the parameters of a spark discharge between an artificial charged water-aerosol cloud and the ground
Studies of the parameters of a spark discharge between an artificial charged water-aerosol cloud and the ground
复制标题
人工带电水气溶胶云与地面之间火花放电参数的研究
DOI：
10.1134/1.1994966
复制
发表时间：
2005
影响因子：
0.7
通讯作者：
Y. Tkach
中科院分区：
文献类型：
--
作者：
A. Temnikov;A. Orlov;V. Bolotov;Y. Tkach
实验研究了接地电极与强带电人工水气溶胶云之间火花放电的光学和电流特性。利用小波分析和傅立叶分析研究了放电电流的频谱特性。三种主要类型的放电与不同的最终阶段的揭示和调查。研究发现，放电的参数在其最后阶段基本上取决于放电轨迹和它渗透到气溶胶云中的深度。结果表明，最强放电类型的参数（放电通道的亮度、最后阶段的电流增长率和进入带电气溶胶云中的穿透深度）与自然闪电主阶段的放电参数接近。它还表明，这样的放电中和高达5%的云电荷。与傅立叶分析相反，小波分析示出了信号幅度（即，放电通道中的能量沉积速率）对于所有类型的放电在高频下最大。特别令人感兴趣的是最强大的放电类型，其中信号幅度（比其他放电大一到两个数量级）在几百兆赫的频率处最大。
The optical and current characteristics of spark discharges between a grounded electrode and a strongly charged artificial water-aerosol cloud are studied experimentally. The spectral characteristics of the discharge current are investigated using wavelet and Fourier analyses. Three main types of discharge with different final stages are revealed and investigated. It is found that the parameters of a discharge in its final stage depend substantially on the discharge trajectory and the depth to which it penetrates into the aerosol cloud. It is shown that the parameters of the most powerful type of discharge (the brightness of the discharge channel, the current growth rate in the final stage, and the penetration depth into the charged aerosol cloud) are close to the discharge parameters in the main stage of natural lightning. It is also shown that such a discharge neutralizes up to 5% of the cloud charge. In contrast to Fourier analysis, wavelet analysis shows that the signal amplitude (i.e., the energy deposition rate in the discharge channel) is maximum at high frequencies for all types of discharge. Of special interest is the most powerful type of discharge, in which the signal amplitude (which is one to two orders of magnitude larger than in other discharges) is maximum at frequencies of several hundred megahertz.