微通道内细颗粒驻波会聚/分离过程的数值模拟  

Numerical simulating for inhalable particle congregation/separation in micro tunnel flow layered acoustic standing wave

作　　者：张平[1] 李泽征[2] 康明[2] 徐江荣[2] 

机构地区：[1]杭州电子科技大学计算机学院,杭州310018 [2]杭州电子科技大学理学院,杭州310018

出　　处：《环境工程学报》2010年第8期1887-1891,共5页Chinese Journal of Environmental Engineering

基　　金：浙江省教育厅科技计划项目(Y200804320)

摘　　要：为了研究微通道内可吸入颗粒的声波会聚现象,在两相流的框架下,对三出口微通道颗粒分离元件实现了声-流场中的颗粒运动的两相流动计算;计算方法中,首次提出的颗粒方程全导数离散方法,并成功运用于两相流动颗粒轨道的计算;模拟结果表明了超声换能器的长度对颗粒会聚的影响和出口流量对颗粒分离的影响。计算结果为三出口微通道颗粒分离元件的设计和应用提供参考。The micro tunnel flow with three outlets was simulated by SIMPLE method and the inhalable particle congregation/separation process was predicted by the particle motion equation by adding acoustic radiation force.It is the first time that the total derivative was used to discrete the motion equations of particle and the discrete equations was solved numerically to simulate the particle motion trajectories.The simulation results showed that the acoustic transducer length and outlet flux were the main influencing factors.The simulation results were worth to optimization design of the inhalable particle congregation/separation device.

关 键 词：声波驻波 可吸入颗粒 两相流 数值模拟 

分 类 号：X513[环境科学与工程—环境工程]