提升管内稠密气粒两相流动大涡模拟  

MODELING THE HYDRODYNAMICS OF DENSE GAS-PARTICLE FLOW IN A RISER BY LES

作　　者：向屏[1] 郭印诚[1] 

机构地区：[1]清华大学工程力学系,北京100084

出　　处：《工程热物理学报》2004年第S1期75-78,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50376028)

摘　　要：本文采用双流体模型,引入颗粒动力学理论,对提升管内的稠密气粒两相流动进行了大涡模拟。采用改进的分步投影法对滤波后的方程进行显式求解,小尺度量采用Smagorinsky亚格子模式模拟。模拟结果给出的颗粒相速度分布、浓度分布与实验值基本吻合,气固两相存在速度滑移。模拟结果合理预报出了提升管内的环-核流动结构。Based on the two-fluid modei, large eddy simulation (LES) with two-way coupling is performed for two-dimensional gas-particle flow in a riser. The kinetic theory of granular medium is introduced to describe the particle fluctuation behaviours. The motions of small-scale structures of the two phases are both described by Smagorinsky SGS modei. The predicted time-averaged results are in reasonable agreement with the experimental data, which well depict the non-uniform distributions of the particles in both ax...

关 键 词：大涡模拟 气粒两相流动 提升管 

分 类 号：TK123[动力工程及工程热物理—工程热物理]