线筒式电晕放电伏安特性关系的研究

线筒式负电晕放电是指阳极为半径较大的圆筒,阴极为半径很小的导线的电晕放电形式,是静电除尘器中最基本的放电形式.笔者研究了阳极筒半径分别为100,80,50 mm,阴极线半径为0.5,0.25,0.15 mm,有效长度为1 m的情况下线筒式负电晕放电的伏安特性,测量得到了不同情况下的放电电流值和I-U关系图.结果表明放电电流随着阴极半径的减小和阳极半径的增大而增长.另外发现I/U和U之间呈很好的线性关系,对此结果进行了理论分析,得出关系式I=8π0εμ(U-Us)UR2ln(R/r0),结果与实验现象相吻合.

Current-voltage Characteristic of Wire-cylinder Type Negative Corona Discharge

Wire-cylinder type negative corona discharge is referred to discharge which are composed with a wider cylinder used to as the positive electrode and a very narrow wire used to as the negative electrode.In this paper,the current-voltage characteristic of wire-cylinder type negative corona discharge has been studied.The wire radius is 0.5,0.25 mm and 0.15 mm respectively with a effective length 1m,and cylinder radius is 100,80,50 mm.The discharge current and relations between current and voltage have been obtained.Results show that the discharge current increases with the decrease of negative electrode radius and the increase of positive electrode radius.In addition to,I/U is linearly to discharge current,and the relation has been discussed.Finally,the equation of I=8πε0μ(U-Us)UR2ln(R/r0) was obtained,which is accord with the experimental results.