注入电功率密度、电离能密度及气体速度参量对离子输运率的影响  

Influence of Power Density, Ionization Energy Density and Gas Velocity on Plasma Transport Rate

作　　者：白敏菂[1] 周建刚[2] 毛首蕾[1] 李超群[1] 

机构地区：[1]大连海事大学物理系,大连116026 [2]大连大学物理科学与技术学院,大连116622

出　　处：《高电压技术》2014年第7期2039-2043,共5页High Voltage Engineering

基　　金：国家自然科学基金(61371027);交通运输部科技项目(2012329225080);大连市科技计划项目(2013E12SF067)~~

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。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/cm^3 ionization energy density, the transport rate is increased from 5.4×10^8cm^-3·s^-1 to 8×10^10cm^-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.

关 键 词：输运率 电晕放电 注入功率 气体速度 离子运动规律 电场强度 

分 类 号：O53[理学—等离子体物理]