高频感应热等离子体中粉末颗粒的运动行为研究  

Study on movements of particles in thermal plasma induced by radio frequency induction

作　　者：陈文波[1,2] 陈伦江[1] 刘川东[1] 程昌明[1] 童洪辉[1] 朱海龙[3] CHEN Wen-bo;CHEN Lun-jiang;LIU Chuan-dong;CHENG Chang-ming;TONG Hong-hui;ZHU Hai-long(Southwestern Institute of Physics, Chengdu 610041;College of Electrical Engineering, University of south China, Hengyang 421001;College of Physics and Electronics Engineering, Shanxi University, Taiyuan 030006)

机构地区：[1]核工业西南物理研究院,成都610041 [2]南华大学电气工程学院,衡阳421001 [3]山西大学物理电子工程学院,太原030006

出　　处：《核聚变与等离子体物理》2018年第2期243-248,共6页Nuclear Fusion and Plasma Physics

基　　金：国家自然科学基金(11535003;11675074);湖南省教育厅项目(15C1174)

摘　　要：建立了高频电感耦合等离子体炬的二维轴对称模型,利用商用软件FLUENT对钛粉颗粒在纯氩热等离子体内的运动轨迹进行了模拟,研究了前驱体粒径及载气流量的变化对粉末颗粒受力过程的影响。研究结果表明,粒径小的颗粒受炬内回流作用的影响较大,颗粒运动轨迹杂乱,而粒径大的颗粒受回流的影响则很小;降低载气流量可以使钛粉的受热更加充分,使得更多的颗粒被加热至熔化,可提高粉末的球化率。A two-dimensional axisymmetric model of radio frequency（RF） inductively produced plasma is created, and the trajectory of particles in argon thermal plasma is calculated with ANSYS FLUENT software. Then the influence of powder size and carrier gas flow rate on the forces acting on the particles is studied in detail. The results show that the trajectories of small particles are disorganized due to the influence of recirculation zone while the movements of lager particles are dominantly controlled by gravity. Adjusting carrier gas flow can make more particles be heated sufficiently and to be melted, consequently, the spheroidization rate of particle is increased.

关 键 词：感应耦合 氩等离子体 载气流量 颗粒轨迹 

分 类 号：TB43[一般工业技术] O530[理学—等离子体物理]