折板除沫器流场与分离效率的数值模拟  

Numerical Simulations of Flow Field and Separation Efficiency for Wave-Plate Mist Eliminator

作　　者：刘丽艳[1] 杨静[1] 孔庆森[1] 李洪[1] 谭蔚[1] 

机构地区：[1]天津大学化工学院,天津300072

出　　处：《天津大学学报（自然科学与工程技术版）》2013年第8期755-761,共7页Journal of Tianjin University：Science and Technology

基　　金：国家重点基础研究发展计划(973计划)资助项目(2009CB219905);长江学者和创新团队发展计划资助项目(IRT0936)

摘　　要：选取颗粒输运多相流模型和RNG k-ε湍流模型,运用ANSYS12.1软件的CFX模块对折板式除沫器内部气液两相流场及分离效率进行了数值模拟.通过数值模拟所得液滴的运动轨迹、速度、压力和漩涡分布来深入分析内部流场情况,为优化除沫器结构设计,改进其力学性能提供理论基础.数值模拟计算结果表明,在不同液滴直径下除沫效率随转折角、级数、折板间距和气流速度都有一定的变化规律.该计算结果与已有理论计算及实验结果保持一致,对进一步修正完善理论计算和工业设计具有指导意义.Using particle transport multiphase flow model and RNG k-e turbulence model in the CFX module of AN- SYS12.1, the internal gas-droplet two-phase flow field and separation efficiency of wave-plate mist eliminator was numerically simulated. The flow field was thoroughly analyzed based on the graphic display of droplet trajectory, speed, pressure and whirlpool distribution, which lays a theoretical foundation for the optimization of structure de- sign and the improvement of its mechanical properties. Numerical simulation results show that separation efficiency changes with bend angle, series, distance between parallel plates and airflow velocity at different particle sizes. This result agrees well with the existing theoretical calculation and experimental results, which is instrumental in further modifying the theoretical calculation expression.

关 键 词：折板式除沫器 CFD数值模拟 流场 分离效率 

分 类 号：TQ051.8[化学工程]