闪电通道温度测量方法  

Measuring Method for Lightning Channel Temperature

作　　者：李祥超[1] 周中山[1] 陈则煌[1] 陈璞阳 

机构地区：[1]南京信息工程大学中国气象局气溶胶-云-降水重点开放实验室,南京210044

出　　处：《高电压技术》2015年第5期1544-1549,共6页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(2014CB441405);国家自然科学基金(41075025)~~

摘　　要：针对自然界闪电通道温度特性研究的诸多局限性，通过将原子光谱理论与局部热力学平衡（LTE）模型应用于闪电光谱的研究，采用雷电冲击平台（ICGS）模拟闪电通道放电，对模拟闪电通道中红外波段光谱（930nm）与可见光波段光谱（648．2nm）的光谱能量进行计算分析。分析结果为：当模拟闪电通道电流为5～50kA时，红外波段与可见光波段谱线的发光强度峰值与闪电通道电流呈正相关；闪电通道温度在6140．8～10424K范围内变化，闪电通道内电流与其内温度具有较好的指数函数关系，且此函数与自然界中闪电通道电流和闪电通道温度关系具有较好的一致性。In order to avoid the limitation of research for the temperature characteristics of lightning channel in the nature, the theory of atomic spectra and the model of local thermodynamic equilibrium （LTE） were adopted to study the lightning spectra. The impulse current generator platform（ICGS） was used to simulate the lightning discharge channel and to calcu- late the spectral energy of infrared spectroscopy （930 nm） and the visible spectroscopy （648.2 nm） of simulation lightning The results indicate that the peak of luminous intensity of infrared and visible spectral line has a good positive correlation with the lightning current when the simulated lightning current is 5-50 kA. The change range of channel temperature is 6 140.8～10 424 K. Moreover, the current of simulated channel has an exponential function relation with the temperature, which is similar to the relation between the current and the temperature of nature lightning channel.

关 键 词：闪电光谱 通道温度 原子光谱 局部热力学平衡模型 闪电电流 雷电冲击平台 

分 类 号：P427.32[天文地球—大气科学及气象学]