| Numerical simulation of temperature and velocity fields in plasma spray |
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| 作者姓名： | 范群波 王鲁 王富耻 |
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| 作者单位： | School of Materials Science and Engineering Beijing Institute of Technology，School of Materials Science and Engineering Beijing Institute of Technology，School of Materials Science and Engineering Beijing Institute of Technology，Beijing 100081 China，Beijing 100081 China，Beijing 100081 China |
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| 基金项目： | 国家科工委国防科技项目 |
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| 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 m3/h,FHe=0.85 m3/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.
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| 关 键 词： | 等离子体 喷雾 温度 数字模拟技术 |
| 收稿时间： | 24 August 2006 |
| 修稿时间： | 2006-08-242006-09-27 |
Numerical simulation of temperature and velocity fields in plasma spray |
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| Fan Qun-bo , Wang Lu and Wang Fu-chi.Numerical simulation of temperature and velocity fields in plasma spray[J].Journal of Central South University of Technology,2007,14(4):496-499. |
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| Authors: | Fan Qun-bo Wang Lu and Wang Fu-chi |
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| Affiliation: | School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China |
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| Abstract: | 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, F
Ar = 1.98 m3/h, F
He = 0.85 m3/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.
Foundation item: 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 |
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| Keywords: | plasma spray plasma jet temperature field velocity field |
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