摘要
针对实时高效检测空气中PM0.5的浓度问题,设计了一种新型亚微米惯性冲击器。在传统惯性冲击器基础上,将冲击板改为椭圆凹槽型形状,可有效的将粒子切割直径降为0.5μm,解决了粒子逃逸问题,同时将冲击器设计为二级惯性冲击器,可有效地降低壁损失。在计算流体动力学(CFD)分析软件FLUENT中,借助k-epsilon湍流模型模拟连续相,粒子颗粒模型(DPM)模拟离散相,模拟了惯性冲击器的颗粒轨迹,研究了惯性冲击器的分离效率和壁面损失,分析结果表明其收集效率有明显提高。
A new submicron inertial impactor is designed to detect the concentration of PM0.5 in the air in real time and efficiently.Based on the traditional inertial impactor,the impact plate is changed into an elliptical groove shape,which can effectively reduce the particle cutting diameter to 0.5 micron,solving the problem of particle escape;Meanwhile,the impactor is designed as a two-stage inertial impactor,which can effectively reduce the wall loss.In FLUENT,the computational fluid dynamics(CFD)analysis software,the K-epsilon turbulence model is used to simulate the continuous phase,and the particle particle model(DPM)is used to simulate the discrete phase,and the particle trajectory of the inertial impellers is simulated.The separation efficiency and wall loss of the impellers are studied.The analysis results show that the collection efficiency is significantly improved.
作者
孙茂文
SUN Mao-wen(School of Mechatronics and Vehicle Engineering,Chongqing Jiaotong University,Chongqing 400074,China)
出处
《机械研究与应用》
2020年第6期101-103,110,共4页
Mechanical Research & Application
关键词
亚微米粒子分离
惯性冲击器
分离效率
壁面损失
CFD
submicron particle separation
inertial impactor
separation efficiency
wall loss
CFD
