非稳态等离子体射流在液体中的膨胀特性  

Expansion Characteristics of Transient Plasma Jet in Liquid

作　　者：周彦煌[1] 刘东尧[1] 余永刚[1] 

机构地区：[1]南京理工大学动力工程学院,南京210094

出　　处：《南京理工大学学报》2003年第5期525-529,共5页Journal of Nanjing University of Science and Technology

基　　金：国家自然科学基金 (10 0 72 0 2 9) ;南京理工大学科研发展基金

摘　　要：该文采用数字高速摄影测试技术对电弧等离子体射流在液体中膨胀特性、泰勒空腔发展过程进行了实验研究。通过对录像图片的分析 ,初步获得了放电能量及喷嘴结构对等离子体射流结构特征和泰勒空腔在轴向和径向的发展过程的影响。测得的泰勒空腔头部发展速度与前人的实验结果相同 ,但在射流结构上有新的发现 ,相间界面存在明显的冷却暗区 ,泰勒空腔有时出现间断。The expansion characteristics and expansion processes of arc plasma jet in liquid are studied by means of fast-framing camera system. From the analysis of the fast-framing pictures, the influence of discharging power and nozzle structure on the structural characters of plasma jet and the axial and radial expansion velocities of Taylor cavity are discussed.The front expansion velocities of Taylor cavity measured in this paper are in good agreement with the results of the former's,but several new discoveries about the structure of plasma jet are presented in this paper.There is a distinct dark area between two-phase fluids,and the Taylor Cavity shows discontinuity in the expansion process.

关 键 词：等离子体射流 电热发射 高速摄影 泰勒空腔 

分 类 号：O53[理学—等离子体物理]