【摘要】 本文采用Mach—Zehnder干涉仪,用He—Ne激光器作光源,对自制的最大功率为4千瓦的切割用等离子体射流进行了研究。分别拍摄了电弧电流为40—100安,氩气流量为0.35—0.45m~3/h的氩等离子体射流的干涉照片,讨论了等离子体射流中心弧区以及边缘高温气体区适用的干涉理论,并采用分区计算的数值方法给出了不同电流、距喷口不同距离时氩等离子体射流的电子密度分布和温度分布。更多还原

【Abstract】 A Mach—Zehuder interferometer with He—Ne laser as light ource was used to study the metal—cutting plasma jet of 4 KW. A number of interference plates were taken.The arc currents varied from 40A to 100A and Argon flowrate from 0.35 to 0.45 M~2/h respectively. Two model of interference theory corresponding to the central and outer region of the plasma were discussed. The electron density distribution and temperaure distribution of argon plasma jet at various current values and sections at different distance from the jet exit were calculated for the central and outer region of arc plasma using corresponding interference theory.更多还原