六氟化硫气流中电弧热边界区特性的研究  

CHARACTERISTICS OF THERMAL BOUNDARY REGION OF ARC IN SF_6 GAS FLOW

作　　者：胡万平[1] 王其平[1] 

机构地区：[1]西安交通大学电气工程系

出　　处：《西安交通大学学报》1989年第1期1-8,共8页Journal of Xi'an Jiaotong University

摘　　要：本文以电弧参数测量和光学流动显示相结合的方法,对六氟化硫(SF_6)电弧的热边界区进行了研究。在实验中拍摄了电弧拉出喷口时的形象与气流场光学图象。运用 Abel 转换方法计算了热边界区内气体密度与温度分布。研究发现,在燃弧绝大部分时间,热边界区阻塞喷口,造成流量严重下降。同时,热区气体吸收了大量电弧能量。干涉图片还显示,热区直径在随电流变化中有明显滞止现象。热滞止效应使热区在电流零后可维持较长时间,从而造成了对介质恢复过程的影响。The theamal boundary region (TBR) of are in SF_6 gas flow is studied thro- ugh the experimental measurements and optical flow visualization.The are images and interferograms of gas flow field are displayed and photoed in the tests.The distribuion of temperature and particle density within the TBR are calculated by using Abel inversion and numerical method.It is found that in most of the arcing time,the TBR fills in the nozzle and makes the gas flow decreases severely.The gas in the TBR absorbs a large amount of are energy. It is shown by interferograms also that the TBR has a time lag in the reducing of diameter with decreasing current.The effect of time lag causes the TBR to last out a long period after current zero,thus influencing the process of die- lectric recovery.

关 键 词：六氟化硫 气流 电弧 热边界层 

分 类 号：TM561.3[电气工程—电器]