伞罩除尘器内黑烟颗粒浓度分布特性的数值分析  

Numerical Simulation on Particle Concentration Distribution of Black Smoke in Canopy Dust Catcher

作　　者：李彩亭[1,2] 蔡志红[1,2] 路培[1,2] 谢旭文[1,2] 周扬鑫[1,2] 张巍[1,2] 高宏亮[1,2] 

机构地区：[1]湖南大学环境科学与工程学院,湖南长沙410082 [2]湖南大学环境生物与控制教育部重点实验室,湖南长沙410082

出　　处：《湖南大学学报（自然科学版）》2011年第2期75-81,共7页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(50878080);长沙市科技重大专项(K0902006-31)

摘　　要：采用FLUENT软件模拟了伞罩除尘器内黑烟颗粒浓度的分布特性.在气相和颗粒相分别选用雷诺应力模型（RSM）和离散相模型（DPM）的基础上,计算了入口含尘质量浓度（1~7 g/m3）、入口气速（10~16 m/s）和黑烟颗粒粒径（0.24~11μm）对伞罩除尘器内黑烟颗粒浓度的轴向和径向分布的影响.模拟结果表明：黑烟颗粒在伞罩除尘器内部的浓度分布在径向上可分为中间低浓度区和近壁高浓度区,而同一径向截面位置的黑烟颗粒浓度随着入口含尘质量浓度的增大而增大,随入口气速、颗粒粒径的增大而减小.将模拟结果与实验结果进行比较,发现模拟的压降值与实验值吻合较好,相对误差小于6%.这些研究结果将为建立完善的伞罩除尘器模型提供依据.The particle concentration distribution characteristics of black smoke in a canopy dust catcher were numerically simulated with FLUENT software.The effects of the particle diameter（0.24~11 μm）,inlet dust loading（1~7 g/m3） and inlet velocity（10~16 m/s） on the particle concentration profile were calculated with selecting Reynolds stress model（RSM） and Discrete phase model（DPM） as gas phase model and particle phase model,respectively.Simulation results showed that the particle concentration of black smoke in a canopy dust catcher was radially distributed into low-concentration in the middle areas and high-concentration near the wall.In the same radial cross section,the particle concentration increased with the rise of inlet dust loading,and decreased with the increase of particle diameter and inlet velocity.Furthermore,the simulation results agreed well with the experiment data.The relative error of the pressure drop was less than 6%.These results will provide a basis for the building of a perfect umbrella cover dust model.

关 键 词：伞罩除尘器 黑烟 颗粒浓度分布 数值模拟 计算流体力学 

分 类 号：TQ028.25[化学工程]