正极性雷云作用下避雷针流注形成研究  

A Developing Research on the Streamer of Lightning Rod under Positive Polarity Thundercloud

作　　者：李自成[1] 杨国华 袁保山[3] 

机构地区：[1]成都理工大学工程技术学院,乐山614000 [2]四川中光产业发展集团,成都611731 [3]核工业西南物理研究院,成都610041

出　　处：《科学技术与工程》2014年第27期140-143,共4页Science Technology and Engineering

基　　金：国家自然科学基金(11375055)资助

摘　　要：讨论了在正极性雷云作用下避雷针流注形成过程,对从电子崩出现到流注形成的整个初始放电过程进行了分析。使用含电子、正离子、负离子的连续方程对雷电下气体的放电过程建模,通过耦合泊松方程求解空问电荷对电场的畸变影响。采用变量耦合计算得到了整个过程中电子浓度、正离子浓度、电子热能的空间分布,分析了电子浓度、正离子共同作用下对电场的影响。通过分析还得出在电子浓度高的区域电子热能并不高,两种的分布趋势并不完全一致。Streamer formation process in the case of positive polarity thundercloud lightning was discussed. The analysis is done for the development from the electron avalanche emerging to the streamer discharge. By the continuity equation of electrons,positive ions and negative ions,the model is established for the lightning gas discharge process. The spatial field distortion is calculated through the Poisson equation. By variable coupling method,the dynamic spatial distribution of electrons,positive ions and electron thermal energy are obtained. The influences to the electric field added by the action of the electron concentration combined with the positive ions are calculated. By analyzing the results,the distribution of electron thermal energy is not according with that of high electron density.

关 键 词：雷云 正极性 电子崩 流注 放电 

分 类 号：O441.1[理学—电磁学]