聚并器内颗粒聚团数值模拟  

Numerical Simulation of Particles Agglomerate in Turbulent Aggregation Device

作　　者：郑建祥[1] 王京阳[1] 许帅[1] 

机构地区：[1]东北电力大学能源与动力工程学院,吉林吉林132012

出　　处：《东北电力大学学报》2017年第4期52-55,共4页Journal of Northeast Electric Power University

基　　金：吉林省科技发展项目(201101109);吉林市科技发展项目(20156405);吉林省教育厅"十三五"科研项目(吉教科合字[2016]第81号)

摘　　要：湍流聚并技术能使小颗粒长大成大颗粒从而提高传统除尘器对超细颗粒的捕捉效率来减少超细颗粒的排放量。用欧拉双流体模型耦合力平衡模型(通过用户自定义函数(UDF)引入)对聚并器进行数值模拟。模拟了聚并器内聚团的长大;计算了聚并器出口不同位置处的固相体积分数、聚团尺寸以及聚团尺寸与速度之间的关系。模拟结果显示:涡片有助于聚团的形成;形成聚团后固相总的体积分数减小,尺寸较大的聚团对应的速度较小。Turbulence coalescence technology enables small particles grow larger particles to improve the cap- ture efficiency of ultrafine particles to reduce emissions for conventional filter. Numerical simulation of turbulent aggregation device is based on Euler two-fluid model coupling with force balance model （ self-defined functions （UDF） introduced by the user）. Using this method simulates particles growing in turbulent aggrega- tion device. And calculates the solid volume fraction, agglomerate size, the relationship of agglomerate size with speed. Simulation results show that ： vortex sheet contributes to the formation of agglomerates. The total solid phase fraction decreases after Agglomerates formed. And the larger agglomerates, the smaller speed.

关 键 词：超细颗粒 力平衡模型 双流体模型 湍流聚并 

分 类 号：X701.2[环境科学与工程—环境工程]