气固两相射流的数值研究

本文根据ＰＳＩ－Ｃｅｌｌ模型，用差分法计算，分析了喷嘴内的气固两相流动和喷嘴外的自由射流，不计颗粒间的相互作用，粒子自旋，粒子和固壁间的碰撞模型为非规则模型，并将部分计算结果与实验作了比较，吻合良好，计算结果表明在气－固两相射流中，粒径大的粒子比密度小的粒子其轴线速度衰减得慢，而密度的变化却对粒子的扩散快慢影响不大。

Numerical Study of Gas-Particle Two Phase Jet

In this paper, the Particle-Source-In-Cell model is used to calculate the axisymetric particle-laden jets and the flow in the pipe leading to the nozzle by finite difference method. Eularian method is used to describe the motion of gas while Largrange method is used to describe that of particles. The particle interaction and rotating are negelected. The irregular model for colltion of particles on the wall of the pipe is used. Part of results of the calculation is compared with that of experiments and fits well. The results of the caculation show that velocity of larger diameter declines slower than that of smaller diameter particle, but the particle of larger diameter diffuses faster than the small one. It alsoe shows that the velocity of heavy density particle has less effect on particle diffusion. The method of the caculation used in this paper could also predict other gas particle two phase flow fields.