数值模拟分析叶轮式颗粒流量计的工作机理  

Numerical analysis of working mechanism of a bulk turbine meter

作　　者：肖国先[1] 徐德龙[1] 胡道和[2] 时钧[2] A.B.Yu 

机构地区：[1]西安建筑科技大学材料科学与工程学院陕西西安710055 [2]南京工业大学材料科学与工程学院江苏南京210009 [3]SchoolofMaterialsScience&EngineeringUniv.ofNewSouthWales,Sydney2052,Australia

出　　处：《计算机与应用化学》2004年第3期339-342,共4页Computers and Applied Chemistry

基　　金：国家"九五"重点科技攻关项目(97-559-04)

摘　　要：用颗粒离散法数值模拟循环流化床中测定物料流率的叶轮式流量计工作过程。数值模拟结果表明叶轮的工作过程分为加速旋转阶段和等速转动阶段,加速段的终端速度取决于流动颗粒的流率;在等速阶段,叶轮转速基本恒定。颗粒质量流率与叶轮转速基本呈线性关系,这与实验所得到的结果相吻合。The turbine meter used for metering solids re-circulating flow-rate of Circulating Fluidized Bed is firstly numerically simula-ted by the Discrete Element Method.The numerical model for describing the turbine performance is proposed, and an equation for gov-erning the flow of particles and rotation of the turbine is obtained by analyzing the movement of solids and that of turbine.The simula-tion results indicate that the working process of the turbine is divided into two stages:the acceleration'stage and the steady rotationstage.The final rotation velocity of the turbine at the end of the acceleration stage depends on the velocity of flowing particles.Duringthe steady stage,the rotation velocity of the turbine is almost constant.Also,the relationship between solids mass flow rate and the ro-tation rate of the turbine is almost linear,and the relationship is well predicted by observation.

关 键 词：数值模拟 叶轮式颗粒流量计 工作原理 工作过程 循环流化床 

分 类 号：TQ051.13[化学工程] TQ056.15