脉冲袋式除尘器喷吹气流的数值模拟  

Study of numerical simulation of cleaning flow of pulse-jet filter bag in the cleaning process

作　　者：党小庆[1] 刘美玲[1] 马广大[1] 胡红胜[1] 马娥[1] 

机构地区：[1]西安建筑科技大学环境与市政工程学院

出　　处：《西安建筑科技大学学报（自然科学版）》2008年第3期403-406,412,共5页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家863计划项目资助课题(2005AA642010)

摘　　要：借助计算流体动力学方法,采用二维非稳态流动数学模型,对脉冲袋式除尘器滤袋内喷吹气流的压力分布进行了数值模拟.通过与喷吹压力实验值对比,验证了数值模拟结果的可靠性,表明可将数值模拟作为脉冲喷吹的研究方法.在用不同时刻的滤袋壁面压力分布图来表示的模拟结果中显示,随着气流向袋底方向运动,滤袋壁面压力的最大值不断下移,距袋口0.5 m处,峰值压力和压力上升速率都达到最大值.The method of CFD and two-dimensional, unsteady flow mathematic model were adopted to compute the inside flow of the filter bag when it was cleaning, offering the distribution of the pressure of cleaning flow. Compared with the data of experiment, the result of numerical simulation was credible, as a result, flow simulation proves to be a method of pulse-jet cleaning.. Different time pressure charts of filter bag was used to show the result of simulation of cleaning flow. The result of simulation showed that as the downward movement of flow, the maximal of filter bag＇s pressure would continuously put back, and at the 0. 5 meter to the top of filter bag, the peak pressure and increscent velocity of pressure reached the maximal.

关 键 词：袋式除尘器 脉冲喷吹清灰 非稳态流动 数值模拟 

分 类 号：TU834.6[建筑科学—供热、供燃气、通风及空调工程] O351.35[理学—流体力学]