感应耦合氩气热等离子体速度分布的数值分析

摘要

The velocity distribution characteristic of inductively coupled argon thermal plasma and the effect of the operation parameters on velocity distribution are investigated in detail.The results show that,compared with direct current arc plasma,inductively coupled thermal plasma has the characteristics of lower velocity,arc flow centralization,peak velocity appeared in the downstream of plasma torch and the reflow phenomenon appeared in on the upstream of coil section.Moreover,it is found that plasma velocity distribution depends strongly on the operating parameters such as injection gas flow rate,induction current.The results would be theoretically helpful for plasma spheroidization of powder and other applications.%对感应耦合氩气热等离子体的速度分布特性以及各操作参数对等离子体速度分布的影响进行了细致的研究.研究结果表明,与直流电弧热等离子体相比,感应耦合热等离子体速度小,弧流集中,速度峰值出现在等离子体炬下游,在线圈段上游出现明显的回流现象.此外,送气流量、感应电流等操作参数对等离子体速度分布有明显影响.研究结果可为等离子体球化粉末颗粒及其他应用提供理论指导.