Results of simulations of streamers propagating along the atmospheric-pressure helium plasma jets ejected from a thin tube into ambient air are presented. The computational model includes the equations governing the helium–air mixture composition along and across the jet, as well as the equations, describing streamer propagation in the mixture, for the electric field and the charged species densities. Streamer velocity and spatial–temporal profiles of plasma parameters are obtained for various values of the helium flow rate. It is shown, in agreement with available experimental data, that the electric field values in the heads of streamers increase nearly linearly with the distance from the tube exit and that the slope of this dependence decreases with the growth of the helium flow rate.

给出了从细管喷射到大气中的沿大气压氦等离子体射流传播的拖缆的模拟结果。该计算模型包括控制沿射流和穿过射流的氦气混合物组成的方程式，以及描述电场和带电物质密度的方程式，该方程式描述了流光在混合物中的传播。对于氦气流速的各种值，可以获得流注速度和血浆参数的时空分布。与现有的实验数据相吻合地表明，拖缆顶部的电场值随距管出口的距离几乎呈线性增加，并且这种依赖性的斜率随氦流量的增加而减小。