【摘要】 为提高大气压非平衡等离子体源的输运项,利用电离连续性方程及带电粒子运动方程分析了离子在电离电场中的受力及其运动规律。对电晕放电点的流光、辉光放电区域内注入电功率密度、电离能密度与气体速度对离子输运项的影响进行了理论研究,并在此基础上进行了实验。研究结果表明:在电晕放电点的流光、辉光放电区域内,注入功率密度、电离能密度等参量对离子输运项的影响程度仅在1个数量级内;当电离能密度为0.4 mJ/cm3时,提高气体速度从1.5 m/s提高到25 m/s,则离子输运项从5.4×108 cm-3·s-1增加到了8×1010 cm-3·s-1,气体速度比电离能密度对输运项的影响程度高出2个数量级左右。可见,提高气体运动速度是解决目前等离子体设备存在问题的一种可行、有效的方法。更多还原

【Abstract】 To improve non-equilibrium plasma ion transport rate, we investigated the force and motion law of ions in ionization electric field using the ionization continuity equation and charged particle motion equation. Then, the influences of input power density, ionization energy density in the point of the stream or glow corona discharge, and gas flow velocity on the plasma transport rate were studied theoretically. The experimental results show that the influences of input power density and ionization energy density in the point of the stream or glow corona discharge on the plasma transport rate are only within one order of magnitude. When the gas flow velocity increases from 1.5 m/s to 25 m/s with 0.4 mJ/cm3ionization energy density, the transport rate is increased from 5.4×108 cm-3·s-1 to 8×1010 cm-3·s-1. The influence of gas flow velocity on transport rate is about two orders of magnitude higher than that of ionization energy density. Accelerating the velocity of gas flow is a feasible and effective way for solving the present problem of inadequate ion density for plasma equipment.更多还原