Numerical simulation of temperature and velocity fields in plasma spray

作     者：范群波 王鲁 王富耻 

作者机构：School of Materials Science and Engineering Beijing Institute of Technology 

出 版 物：《Journal of Central South University of Technology》 (中南工业大学学报（英文版）)

年 卷 期：2007年第14卷第4期

页      面：496-499页

核心收录：

学科分类：07[理学] 070204[理学-等离子体物理] 0702[理学-物理学] 

基　　金：Project (9140A12020306BQ0117) supported by the Commission of Science Technology and Industry for National Defense Project ( 1040012040101) supported by the Excellent Young Teacher Foundation of Beijing Institute of Technology 

主　　题：plasma spray plasma jet temperature field velocity field 

摘      要：Based on the turbulence jet model, with respect to Ar-He mixture plasma gas injecting to ambient atmosphere, the temperature filed and velocity field under typical working conditions were investigated. Given the conditions of I=900 A, FAr= 1.98 m^3/h, FEe=0.85 m^3/h, it is found that both the temperature and the velocity undergo a plateau region near the nozzle exit （0-10 mm） at the very first stage, then decrease abruptly from initial 13 543 K and 778.2 m/s to 4 000 K and 260.0 m/s, and finally decrease slowly again. Meanwhile, the radial temperature and radial velocity change relatively slow. The inner mechanism for such phenomena is due to the complex violent interaction between the high-temperature and high-velocity turbulent plasma jet and the ambient atmosphere. Compared with traditional methods, the initial working conditions can be directly related to the temperature and velocity fields of the plasma jet by deriving basic boundary conditions.