Research on Characteristic Parameters of Lightning Discharge Channels Based on Spectrum  

作　　者：Caixia DONG 

机构地区：[1]Qinghai Higher Vocational and Technical Institute,Ledu 810799,China

出　　处：《Meteorological and Environmental Research》2021年第2期20-22,共3页气象与环境研究（英文版）

摘　　要：According to the time-resolved spectra of lightning return stroke process and based on the plasma transmission theory,the evolution characteristics of the thermal conductivity and thermal diffusion coefficient of the discharge channel over time during the lightning return stroke are discussed.The radial distribution of the channel temperature in the lightning peak current phase is calculated,and the heat transfer along the radial direction of the channel is analyzed.The calculated transmission characteristic parameter values of the lightning discharge channel are all in a reasonable range.The results show that the heat transport coefficient of the lightning channel is closely related to the channel temperature and electron density.After returning to the peak current,the channel temperature slowly decreases,and the transport coefficient shows a non-linear and monotonous decay trend.The closer to the current core channel is,the greater the temperature gradient is,and the more the heat transferred radially outward is.

关 键 词：Lightning discharge channel Thermal conductivity Transport coefficient Characteristic parameter 

分 类 号：P427.3[天文地球—大气科学及气象学]