屏蔽气体对氩等离子体冲击射流的影响

工程热物理学报 , 2005, 26(6): 1019-1021.

1.清华大学航天航空学院,北京,100084

2.清华大学航天航空学院,北京,100084

3.中国科学院力学研究所,北京,100080

4.清华大学航天航空学院,北京,100084

基金项目: 中国科学院资助项目(50336010;5027606510405015)

EFFECTS OF SHROUD GAS ON LAMINAR ARGON PLASMA JETS IMPINGING ON A SUBSTRATE IN AMBIENT AIR

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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