• Corpus ID: 138056715

In-Flight Particle Behavior in Internal Powder Injection Supersonic Plasma Spray

@article{Cha2014InFlightPB,
  title={In-Flight Particle Behavior in Internal Powder Injection Supersonic Plasma Spray},
  author={Tan Cha},
  journal={Journal of Xi'an Jiaotong University},
  year={2014}
}

• T. Cha
• Published 2014
• Physics, Engineering
• Journal of Xi'an Jiaotong University

To investigate the thermal and dynamic behaviors of in-flight particles in plasma flow the velocity and temperature before impinging plate,and the trajectories of particles injected by inner channel are analyzed for whole supersonic plasma flow,the actual in-flight particles are online monitored by SprayWatch-2i.Numerical test result indicates that both particle velocity and temperature achieve the maximum at the distance of 80~100mm,which coincides with the status of observed individual particle in the experiments.So this range of 80~100mm can be taken as the best spraying distance.According to the analysis for Weber number and velocity distribution of particles with small diameters,particles are melted and refined inside the gun or near the gun exit in internal powder injection supersonic plasma spray,which supports the experimental results on heat and mass transfer of particles.