PARTICLE DEPOSITION ON A TRUNCATED CYLINDER IN A SUPERSONIC-FLOW AT LOW-PRESSURE

Deposition of particles, suspended in supersonic gas flows, onto the i mpaction plane of a truncated cylinder in low pressure has been studie d numerically. The analysis of axisymmetric compressible Navier-Stokes equations was carried out, for a gas phase, by using the lower-upper symmetric Gauss-Seidel (LU-SGS) scheme. In addition, the Lagrangian tr ajectory model was used for a particle phase. The dilute gas-particle flow was assumed to be coupled in one direction. The effect of freestr eam pressure on the process of particle deposition was investigated. T he local characteristics of deposition were also demonstrated in terms of particle size and freestream pressure. It is found that the partic les with low total deposition efficiencies can be deposited rather uni formly on the impaction plane when the effect of thermophoresis is con sidered.