JIA Jiaming,LIU Kun.Colse Magnetic Field Driven by Continuous Charge Transfer in Rocket-triggered Lightning:Measurement and Simulation[J].Journal of Chengdu University of Information Technology,2019,(02):138-142.[doi:10.16836/j.cnki.jcuit.2019.02.007]
基于人工触发闪电对击间过程近区磁场的测量与仿真
- Title:
- Colse Magnetic Field Driven by Continuous Charge Transfer in Rocket-triggered Lightning:Measurement and Simulation
- 文章编号:
- 2096-1618(2019)02-0138-05
- 分类号:
- TN959.4
- 文献标志码:
- A
- 摘要:
- 在相关研究文献中,基于天线理论建立闪电回击天线模型得到回击过程中产生的电磁场计算结果已与传输线模型(TL)等其他回击模型的计算结果进行了详细的对比验证,并得到较好的结果。然而基于该模型,针对相关击间过程,计算在闪电通道附近磁场的有效性并未进行实验验证。文中基于2014年夏在中国科学院大气物理研究所山东人工触发闪电实验基地获取的观测数据,利用回击天线模型对由上行正先导(UPL)始发阶段的电流脉冲簇、UPL发展导致的初始连续电流(ICC)和回击后连续电流上叠加的M分量产生的磁场进行计算,并将其与实验数据进行对比研究。由仿真计算结果与实验数据对比可见,虽然在距离闪电通道78 m和970 m处的仿真结果和实验数据吻合较好,但应该注意的是天线模型只能针对雷电流流经整个闪电通道的闪电过程所产生的磁场进行计算,对于云内闪电过程所辐射的电磁场,则无法利用天线模型进行有效模拟。
- Abstract:
- The electromagnetic field of return stroke calculated by using the antenna-theory(AT)model has been tested and verified with other return stroke models,such as transmission line model(TL).However, the validity of using the AT model to calculate the magnetic fields close to lightning channel has not been verified for continuing charge transfer process in lightning.In this paper, we presented the simulation of magnetic fields driven by the burst of current pulses(the so-called precursors)during the very initial stage of UPL, the ICC as due to the development of UPL and M-component inContinuous current after return stroke with AT model, and the results are compared in detail with therocket-triggered lightningdata, measuredby SHATLE in the summer of 2014. The contrast of simulation results and experimental data shows that, the simulation results at 78 m and 970 m from the lightning channel are in good agreement with the experimental data,it should be noted that the antenna model can only calculate the magnetic field generated by the lightning process of the lightning current flowing through the entire lightning channel.For the electromagnetic field radiated by the in-cloud lightning process,the antenna model cannot be used for effective simulation.
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备注/Memo
收稿日期:2018-12-03