风阀开度对粒子沉积影响效果的数值模拟

摘要

The particle deposition in the ventilation duct with a damper is studied by numerical simulation.The effect of the damper opening on the particle deposition with different particle sizes was analyzed.The results show that the smaller the damper opening is,the larger the particle deposition mass in the duct is.When the damper opening is less than 30°,the particle deposition mass in the air duct increases greatly.Therefore the zone of major particle deposition mass is formed in the wake zone within 1 m behind the damper.%采用数值模拟方法研究粒子在有风阀的通风管道中的沉积规律,分析风阀开度对不同粒径粒子沉积效果的影响.结果表明,风阀开度越小,粒子在风管中的沉积量越大.风阀开度小于30.时,粒子在风管中的沉积量将大幅增加,并且主要集中在由阀门阀片所形成的尾流区的1 m范围内,形成了沉积重灾区.