【摘要】 采用通量校正传输（FCT）算法对二维平面针板结构的正流注模型进行仿真,模拟尖端缺陷局部放电过程,得到正流注移动过程中电子密度分布、净电荷密度分布及电场的变化规律.通过推导光子通量与光电离项的关系,分析光子分布函数,得到流注在空气中运动时光子通量（每秒钟产生的光子数密度）的变化规律.结果表明:空气中正流注的发光位置往往集中在快速移动的流注头部,光子通量的大小与该位置到阴极的距离近似呈指数关系,最大值约为1.4×10²⁸ s^-1·m^-3.更多还原

【Abstract】 The flux-corrected transport（FCT） algorithm is used to simulate the two-dimensional planar needle-plate structure of the positive streamer model and the partial discharge process of tip defects. The variations in electron density, net charge density and electric field during the movement of the positive streamer are obtained. By deducing the relationship between photon flux and photoionization term, the photon distribution function is analyzed, and the variation law of the photon flux（the number density of photons generated per second） of the streamer moving in the air is obtained. The results show that the maximum luminous point concentrates on the fast-moving head of the positive streamer in the air. The photon flux（the number of photons produced per second） is approximately exponential with the distance from the cathode, with a maximum of approximately 1.4×10²⁸ s^-1·m^-3.更多还原