Study on the interaction between the continuous and the dispersed phases in compressible gas-solid mixing layer
Received:March 20, 2007  Revised:December 18, 2007
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KeyWord:compressible flow  gas-solid two-phase flow  mixing layer flow  numerical simulation
刘伟 国防科技大学 航天与材料工程学院,长沙
万国新 国防科技大学 航天与材料工程学院,长沙
陈景兵 国防科技大学 航天与材料工程学院,长沙
刘君 国防科技大学 航天与材料工程学院,长沙
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      Although there have been many numerical studies on particle dispersion in mixing layers, most of them have been conducted for incompressible mixing layers. In this study, numerical simulations of a temporally developing compressible mixing layer are performed to investigate particle dispersion under different convective mach number. The particles are traced using a Lagrangian approach assuming two-way coupling between the continuous and the dispersed phases. Not only the action of gas-field to particles but also the reaction of particles to gas-field is considered. The full compressible Navier—Stokes equations are solved with a high-order finite difference WNND (Weighted Non-Oscillatory, containing No free parameters and Dissipative) scheme, and the equations of particles are discretized by biased three-point difference. The study focuses on the roles of the large-scale vortex structures in particle dispersion at low, medium and high Stokes numbers and the influence of particle on the flow field structure. At the convective Mach number 0.5, the influence of different Stokes number on the dispersion of particles is investigated. At the convective Mach number 0.8, the influence of particles to the shocklet structure in mixing layers is also investigated.