Plasma atomization technology is able to both melt and atomize a material which is fed into the converging plasma jets as a wire. Temperature and velocity distribution in a plasma jet obtained at the outer region of a plasma torch is very important to melt a solid wire and to disintegrate the liquid metal into fine spherical particles. In this study, a non-transferred arc plasma torch is designed and numerically solved for the determination of temperature and velocity distributions in the plasma jet. A high velocity nozzle attachment is assembled to plasma torches for increasing the jet velocity for atomization purposes. Results of numerical solutions with and without high velocity nozzle attachment are discussed and compared with experimental studies. It is found that high velocity nozzle attachment can be favourable in terms of the higher velocity and temperature distribution in the plasma jet at longer distances from the torch exit.

中文翻译：

---

等离子炬喷嘴附件对等离子雾化影响的数值和实验研究

等离子雾化技术能够熔化和雾化材料，该材料作为线被送入会聚的等离子射流中。在等离子炬外部区域获得的等离子射流中的温度和速度分布对于熔化实心线和将液态金属分解成细小的球形颗粒非常重要。在这项研究中，非转移弧等离子炬的设计和数值求解用于确定等离子射流中的温度和速度分布。一个高速喷嘴附件组装到等离子炬上，以增加喷射速度以达到雾化目的。讨论了带有和不带有高速喷嘴附件的数值解的结果，并与实验研究进行了比较。