| 屏蔽气体对氩等离子体冲击射流的影响 |
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| 引用本文： | 程凯,陈熙,潘文霞,王海兴.屏蔽气体对氩等离子体冲击射流的影响[J].工程热物理学报,2005,26(6):1019-1021. |
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| 作者姓名： | 程凯 陈熙 潘文霞 王海兴 |
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| 作者单位： | 清华大学航天航空学院,北京,100084;中国科学院力学研究所,北京,100080 |
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| 摘 要： | 在空气环境中利用氩等离子体射流进行材料加工时,环境空气卷吸进入射流可能会引起金属材料氧化。采用同轴屏蔽气体保护是减小该不利影响的一种可行方案。为此本文对空气环境中层流氩等离子体冲击射流特性受屏蔽气体影响问题进行了数值模拟研究,重点考察了屏蔽气体速度等对材料加工区氧含量的影响。
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| 关 键 词： | 氩等离子体 冲击射流 屏蔽气保护 射流卷吸 组分扩散 |
| 文章编号： | 0253-231X(2005)06-1019-03 |
| 修稿时间： | 2005年3月15日 |
EFFECTS OF SHROUD GAS ON LAMINAR ARGON PLASMA JETS IMPINGING ON A SUBSTRATE IN AMBIENT AIR |
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| CHENG Kai,CHEN Xi,PAN Wen-Xia,WANG Hai-Xing.EFFECTS OF SHROUD GAS ON LAMINAR ARGON PLASMA JETS IMPINGING ON A SUBSTRATE IN AMBIENT AIR[J].Journal of Engineering Thermophysics,2005,26(6):1019-1021. |
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| Authors: | CHENG Kai CHEN Xi PAN Wen-Xia WANG Hai-Xing |
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| Abstract: | When materials processing using laminar argon plasma jets is performed in ambient air, the entrainment of air into the jets will lead to the oxidation of processed metallic materials. Employing a co-axial shrouding gas is a feasible approach to reduce the undesirable material oxidation. This paper studies numerically the effects of the shrouding gas on the characteristics of the laminar argon plasma jet impinging normally upon a flat substrate located in air surroundings. The effects on the jet flow and heat/mass transfer characteristics are investigated of many related parameters, especially of the shroud gas velocity. |
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| Keywords: | argon plasma impinging jet shrouding gas jet entrainment species diffusion |
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