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中高层大气瞬态发光事件(TLEs)是临近空间研究的热点课题,研究TLEs的辐射特性、扰动电子密度等问题的关键在于求解电子能量分布函数(EEDF)。文中基于玻尔兹曼方程数值模型,求解得到了TLEs中气体随时间变化的EEDF;结合唯一变量法,获得了求解过程中的时间步长(δt)、电子能量网格间隔(Δε)、约化电场(E/N)、大气压强(P)、大气温度(tgas)、麦克斯韦分布初始电子平均能量(tel)等对EEDF的影响及其规律;提出了如何在实际复杂环境、变化电场的情况下,利用Boltzmann方程数值模型,并运用这些规律来求解TLEs中气体EEDF,以得到更加准确的结果。
High-level atmospheric transient light-emitting events (TLEs) are hot topics in recent space research. The key to studying the radiation characteristics of TLEs and perturbing electron density is to solve the electron energy distribution function (EEDF). Based on the Boltzmann equation numerical model, the EEDF of gas with time in TLEs was obtained. The time step (δt), electron energy grid interval (Δε) (E / N), atmospheric pressure (P), atmospheric temperature (tgas), and the initial electron mean energy (tel) of the Maxwellian distribution on the EEDF are discussed. , Using the Boltzmann equation numerical model, and using these laws to solve the gas EEDF in TLEs, in order to get more accurate results.