Effect of injection angle on particles in-flight characteristics

This paper investigates the influence of particle injection angle on particles in-flight behaviors and characteristics through an integrated modeling and experimental approach. Experiments were conducted for plasma spray of ZrO ₂. Characteristics of in-flight particles such as size distribution, temperature and velocity were measured using the DPV-2000, IPP and SPT diagnostics tools. Numerical simulations were performed using the comprehensive LAVA-3D-P to various injection angles and carrier flow rates for systematically investigating the effect of injection angles and carrier gas flow rates on particles behavior. It is concluded that at the same carrier gas flow rate, the particle melting status is improved with the decrease of the inject angle, with the positive direction pointing towards the main flow direction. For the same injection angle, the melting status is improved with the increase of the carrier gas flow rate initially and deteriorated when the carrier gas flow rate further increases.