旋风分离器数值计算及性能实验分析  

Numerical Simulation and Experimental Study of the Flow Field in Cyclone Separator

作　　者：赵子琴[1] 袁尚科[1] 燕亚龙 王振彪[1] 

机构地区：[1]兰州工业学院土木工程学院,甘肃兰州730050

出　　处：《宁夏大学学报（自然科学版）》2016年第4期447-451,456,共6页Journal of Ningxia University(Natural Science Edition)

基　　金：国家重点基础研究发展计划"973"项目(2014CB046201);甘肃省高校科研项目(2015B-127);兰州工业学院大学生创新性实验计划项目(201521)

摘　　要：借助计算流体力学软件Fluent,采用三维贴体坐标网格,基于非稳态雷诺应力湍流模型,对旋风分离器内部流场进行数值计算.研究不同粒径固相颗粒的运动轨迹,揭示颗粒在分离器中的运动机理,得到旋风分离器内部气流切向速度、轴向速度及切面旋转矢量速度的分布规律,并与实验测试值进行比对.结果表明:在相同条件下,数值计算与实验测试结果非常接近,能很好地预测切向速度的"驼峰"结构及轴向速度分布的上行流和下行流;随着颗粒粒径的增加,分离器外壁呈螺旋流分布,内部流夹带随粒径的增加而逐渐减小.The flow field in a cyclone separator is simulated with the 3-D body-fitted coordinate system and unsteady RSM turbulence model by using the CFD software Fluent.The different diameter particles mass concentration distribution in a cyclone separator is simulated and the physical mechanism of the movement is studied.The distributions of tangential velocity,axial velocity and rotational vector velocity inside the cyclone separator are got and compared with the experiment results.The results show that the numerical and experimental test results are almost identical under the same conditions,and the unsteady RSM model has a good performance for ＂hump structure＂of tangential velocity,upstream and downstream of axial velocity in the simulation of the cyclone separator.With the increase of particle diameter,the inner vortex particle entrainment decreases,and a helix dust strand near the cyclone wall are observed.

关 键 词：旋风分离器 数值模拟 颗粒轨迹 

分 类 号：TQ051.8[化学工程]