【摘要】 多孔喷嘴冲击式大气采样器广泛应用于大气环境监测,相对于单孔喷嘴采样器,它具有压差小、相同空气雷诺数下采样流量大等特点。利用Marple的冲击理论,设计了一种中流量PM10-PM2.5串级冲击式大气采样器,采样流量为100 L/min。用该采样器进行实地测量,通过PM2.5/PM10的比值分析,该采样器测量的PM2.5/PM10数据基本与文献报道一致。更多还原

【Abstract】 Multi-nozzle impactors are widely used to monitor air quality.Compared to single-nozzle at the same Reynolds number,multi-nozzle impactors have some merits such not causing much pressure drop,higher flow rate.Based on the impact theory developed by Marple and his coworker,a PM₁₀-PM_2.5 cascade impactor is designed which can be used in the condition with mid-flowrate of 100 L/min.The data of PM_2.5/PM₁₀ sampled on-the-spot sampling demonstrate that this result is identical with data in the literature according to PM_2.5/PM₁₀ analysis.更多还原