The analysis of melting and refining process for in-flight particles in supersonic plasma spraying

摘要: Abstract To understand the effect of in-flight particle behavior so as to improve coating quality, an accurate description transport phenomena particles is essential. For supersonic plasma spraying (SAPS), a three-dimensional computational model developed describe jet coupled with injection carrier gas and particles. The heating melting processes single were also studied by numerical method. treats in flow discrete Lagrangian entities that exchange mass, momentum, energy gas. governing equations for Reynolds averaged parameters solved using FVM method continuity momentum are PISO algorithm. velocity temperature measured SprayWatch-2i, morphology was observed Scanning Electron Microscope (SEM). Numerical experimental results showed that, reached maximum at distance 80–100 mm. Particles melted broken into small child jet. accelerated higher flow. completely when about 95 mm time 0.35 ms. compared measurements good agreement has been achieved.