基于摩擦-动力应力模型模拟喷动床气固流动  

NUMERICAL SIMULATION OF GAS-SOLID FLOWS IN SPOUTED BEDS WITH FRICTIONAL-KINETIC STRESSES MODEL

作　　者：李响[1] 孙丹[1] 于龙 何玉荣[1] 杨仲明 陆慧林[1] 

机构地区：[1]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001 [2]哈尔滨锅炉有限责任公司,黑龙江哈尔滨150046

出　　处：《工程热物理学报》2010年第1期68-71,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50776023;No.20606006);科技支撑资助项目(No.2006BAA03B01-07)

摘　　要：建立同时考虑颗粒和颗粒之间瞬间碰撞作用(瞬间接触)和非流化下颗粒滑动和滚动运动产生的颗粒半接触作用的颗粒碰撞-摩擦应力模型。推导具有普适性的固相动量守恒方程,建立高颗粒浓度气固两相流动模型,对喷动床内气体颗粒流动过程进行了数值模拟。模拟计算预测喷动床内喷射区、环隙区和喷泉区颗粒流动特性。预测喷动床内颗粒浓度和速度分布与他人实验结果相吻合。Considering both instantaneous collision and contacting by rolling between particles,a frictional-kinetic stresses model of particles is proposed.The collisional interaction of particles is predicted by kinetic theory of granular flow,while the sustained contact force is calculated from a friction stress model.An inverse tangent function is used to provide a smooth transitioning from the plastic and viscous regimes.Flow behavior of particles is simulated in a spouted bed.The distributions of concentration,velocity and granular temperature of particles are obtained.Calculated particle velocities and concentrations in the spouted beds are in agreement with experimental data published in literature.

关 键 词：气固喷动床 摩擦-动力应力模型 数值模拟 

分 类 号：TQ051.1[化学工程]