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

Abstract

Deposition of particles, suspended in supersonic gas flows, onto the impaction plane of a truncated cylinder in low pressure has been studied 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 trajectory model was used for a particle phase. The dilute gas-particle flow was assumed to be coupled in one direction. The effect of freestream pressure on the process of particle deposition was investigated. The local characteristics of deposition were also demonstrated in terms of particle size and freestream pressure. It is found that the particles with low total deposition efficiencies can be deposited rather uniformly on the impaction plane when the effect of thermophoresis is considered.