Numerical and experimental investigations of splat geometric characteristics during oblique impact of plasma spraying

作者：Kang Chang Wei^*; Tan Jiak Kwang; Pan Lunsheng; Low Cheng Yee; Jaffar Ahmed

来源：Applied Surface Science, 2011, 257(24): 10363-10372.

DOI：10.1016/j.apsusc.2011.06.081

• Splat
• Oblique impact
• Spreading
• Solidification and inclined substrate

Splats are obtained on the substrates inclined at different angles (0 degrees, 20 degrees, 40 degrees and 60 degrees) by plasma spraying process and characterized by SEM and WYKO (R) optical surface profiler. Numerical model is developed using CFD software FLOW-3D (R) to simulate the process of droplet impact, spreading and solidification onto the substrates. Splat characteristics such as spread factor, aspect ratio and fractional factor are defined and compared between simulation and experiment. Fair agreements are obtained. In addition, the impacting behavior including spreading and solidification are analyzed in details from the simulation results. The rates of reduction in droplet kinetic energy during impact, spreading and solidification are also compared between different inclination angles.

• 出版日期2011-10-1