CHEN Chong¹，LIU Huijie^1,2，ZHOU Chongkai¹，LIU Yueyan¹

(1. College of Mechanical and Electrical Engineering，China Jiliang University，Hangzhou 310000，China; 2. College of Automation, Shenyang Institute of Engineering, Shenyang 110136, China)

Abstract: In order to design a more reliable and accurate impactor, hydrodynamics and particle dynamics were calculated by coupling, the influence of different structural parameters on the efficiency of particle interception were compared and analyzed. The flow field of single-stage low-pressure impactors and the movement law of particles in the flow field were studied. The results show that when the diameter of the impact nozzle is half of the original nozzle diameter, the ideal shape collection curve can be obtained, with the highest resolution of 1.92. When the distance between the nozzle and the collecting plate is 0.5 mm, the interception effect of the low-pressure impactor is the best, and the resolution is 6.8.

Keywords: low-pressure impactor; particle size distribution; interception and collection curve; optimal distance

中图分类号：TH766                 文献标志码：A

文章编号：1008-5548(2020)06-0063-06

DOI:10.13732/j.issn.1008-5548.2020.06.009

收稿日期： 2020-05-21， 修回日期：2020-06-19，在线出版时间：2020-09-10 13:19。

基金项目：国家重点研发计划项目，编号：2017YFF0205501。

第一作者简介：陈冲(1995—)，女，硕士研究生，研究方向为流体力学。E-mail：z1701085202@cjlu.edu.cn。

通信作者简介：刘岳燕(1980—)，女，博士，讲师，研究方向为气溶胶、力学。E-mail：12a1803148@cjlu.edu.cn。