摘要
基于采用声波脱除气体中悬浮细粒子(PM2.5)的目的,采用数值模拟和实验相结合的方法,对声场中悬浮于气体中的PM2.5在受到声波作用后所发生的运动进行了研究,并对部分模拟结果通过实验进行了验证.通过对纵向疏密波所引起的PM2.5不均衡受力分析,以及跟踪声场中不同位置PM2.5的运动轨迹,发现在平面声波的作用下,沿声波传播方向不同初始位置的PM2.5在运动速度和运动方向上具有较大差异,声场的加入使气体中原来静止的悬浮细粒子发生顺声波而下、逆声波而上及原处振动的非线性运动,该种运动形式得到了实验验证.
Based on the purpose of using sound wave to remove the fine particles （ PM2.5 ） from air, the movement behavior of PM2.5 caused by sound wave was studied by numerical simulations and experiments. Through the analysis of the force acted on PM2.5 and the tracing of their trajectories, it is found that the movement speeds and directions of PM2.5 in sound field are different, which depend on the different initial locations along the sound wave. Under the influence of sound field PM2.5 moves against the sound wave, moves along the sound wave and vibrates at the original position. The movement behaviors of PM2.5 were confirmed by experiments.
出处
《燃烧科学与技术》
EI
CAS
CSCD
北大核心
2005年第4期298-302,共5页
Journal of Combustion Science and Technology
基金
国家重点基础研究发展规划(973)资助项目(2002CB211604).
