循环流化床提升管气固湍流的计算流体力学模拟——k-ε-k_p-ε_p-Θ5参数双流体模型  

NUMERICAL SIMULATION OF GAS-SOLID TURBULENT FLOW IN RISER REACTOR --k-ε-k_p-ε_p-Θ5 TWO-PHASE FLOW MODEL

作　　者：万晓涛[1] 郑雨[1] 魏飞[1] 金涌[1] 

机构地区：[1]清华大学化学工程系,北京100084

出　　处：《化工学报》2002年第5期461-468,共8页CIESC Journal

摘　　要：提出了用k -ε-kp-εp-Θ 5参数的双流体模型来模拟循环流化床提升管中的气固湍流 .模型用颗粒动力学理论描述颗粒与颗粒间的碰撞 ,用低Reynolds数湍流方程分别模拟气相和颗粒相的湍动 ,并且考虑了气固两相湍动的相互作用 .模拟所得颗粒速度和浓度的径向分布与实验结果吻合良好 .分析表明 :在时间和空间域上 ,采用颗粒相湍动与颗粒间碰撞分离处理和颗粒相湍能及耗散方程的引入是合理的 ;颗粒相湍动与两相湍动相互作用的封闭条件是影响模拟结果的重要因素 .An advanced hydrodynamic model, k-ε-k p- ε p- Θ two-phase flow model is established to simulate the gas-solid turbulent flow in riser reactor.The model,based on the kinetic theory of granular flow which recently is widely used to describe particle flow and simulates both gas phase and solid phase by low Reynolds number turbulent model taking into account the turbulent interaction between gas and particles.The model equations is coded and solved by CFX4 package,a CFD software developed by AEA Technology Company.The predicted results show satisfactory agreement with experimental data.Moreover the detailed analysis indicates that it is reasonable to add the particulate turbulent energy equation and its dissipation equation,and the closure method of the interactions between the turbulence of gas and that of particles is a crucial factor that influences the predicted results.

关 键 词：颗粒动力学 双流体模型 气固湍流 计算流体力学 

分 类 号：TQ021[化学工程]