摘要
借助流体力学计算软件,对新型干法水泥生产线上普遍采用的五边形入口、三心大涡壳式旋风预热器,模拟计算了其内部的气相流动行为.针对该类型旋风预热器本身非轴对称性、内部流场为三维强旋流的特点,在结构建模时,采用非结构化四面体网格离散计算域;在计算模型的选择上,采用雷诺应力输运模型.模拟计算结果表明:与其他领域应用的旋风分离器相比,五边形入口、三心大涡壳式旋风预热器内筒入口附近次级流动相对较弱;其内部的切向速度是经过涡壳的收缩引导使气流切向旋转迅速加速达到峰值;推算出模拟用Ⅰ级旋风筒的阻力系数ζ≈9.22.
Gas flow in preheating cyclone with pentagonal inlet and three core volute chamber was simulated by CFD software in this paper. In view of the feature of nonaxisymmetrical structure of the preheating cyclone, computation zone was discrete by non-structure tetrahedron grid in the model building. Reynolds Stress Model was used to simulate the turbulence flow. The results of the simulation indicate： compared with cyclone in other domain, the secondary flow of the preheating cyclone with pentagonal inlet and three core volute structure is relatively weaker. The gas revolved tangentially and reached tangential velocity peak value rapidly by shrinkage and guide of three core volute structures. Coefficient of drag ζ≈9.22 which is the coefficient of the first-order preheating cyclone by simulation is calculated.
出处
《西安建筑科技大学学报（自然科学版）》
CSCD
北大核心
2007年第1期105-109,114,共6页
Journal of Xi'an University of Architecture & Technology(Natural Science Edition)
基金
国家863攻关项目(编号:2003AA33X060)
关键词
五边形入口
三心大涡壳
旋风预热器
数值模拟
流场
pentagonal inlet
three core volute chamber
preheating cyclone
numerical simulation
flowfield.
