密相、湍流、可压、气固两相流理论及在管道中的应用

Analysis of dense,turbulent,compressible,gas-particle two-phase flow and its application to pipe flow

就密相、湍流、可压、气固两相流的基本方程用双流体模型进行了较详尽地归纳。与单相流体相比 ,在两相流的基本方程中 ,多了一个变量 (体积浓度 )及两相间的耦合作用 ,并用CDIPSA方法对可压密相上升管道湍流流动进行了计算。结果表明 :随颗粒直径的增加 ,使得单个颗粒脉动速度减小 ;

This paper deals with the dense, turbulent, compressible gas particle two phase flow in detail. Compare to single phase flow, on the governing equations of two phase, a variable, volume density, was introduced, the interaction between the two phase and its influence on turbulence structure were accounted for. Numerical study of dense compressible gas particle two phase turbulent up flow in a pipe is performed.It is showed that, With the increase of particle diameter, the particle fluculating velocity is decreased, but velocity difference between gas and particle is increased.