ZOU Yaxiong,REN Xiaoqing,LIU Weiguang,LIU Wei，ZHANG Zewu,YAN Jun

(Environmental Monitoring Instruments Industry Measurement and Testing Centre, Qingdao Institute of Measurement Technology,Qingdao 266000,China)

Abstract:In order to improve the particle separation performance of VSCC PM_2.5 particle cutter,three commonly used S-style functions of Sigmoid-8092，Logistic and Gompertz were adopted to regress experiment data and the fitting accuracies were compared,experimental method was used to study the effects on 50% cut-off diameter D_a50 and geometric standard deviation σ_g from different structures of cutter,the cutter was improved by structures coordination method and an experiment verification was done.The results show that the fitting accuracy is higher of Sigmoid-8092 compared with the other two kinds of functions,as its linear regression fitting degree R²≥0.991.The improved cutter changes the D_a50 from 2.32～2.52 μm of VSCC to 2.52～2.57 μm,and the σ_g is reduced from 1.15～1.30 to 1.15～1.25.Sigmoid-8092 function is suitable as the fitting function for penetration curve.Signal structure parameter can hardly optimize σ_g while not changing D_a50,and the coordination between inlet diameter D_in and cone bottom diameter B can realize the purpose of penetration performance improvement.Increasing the circle round Reynolds number Re_ann is beneficial to the improvement of σ_g,and the effective way to increase Re_ann is reducing the value of D_in.The equivalent Reynolds number method can be used to determine D_in dimension.

Keywords:particle cutter；penetration efficiency;structures coordination;method of Reynolds number equivalent

中图分类号： TF805.3+2                           文献标志码：A

文章编号：1008-5548(2022)05-0113-15

DOI:10.13732/j.issn.1008-5548.2022.05.014

收稿日期： 2022-03-29， 修回日期：2022-05-19，在线出版时间：2022-08-15 09:12。

基金项目：山东省重大科技创新项目，编号：2019JZZY010419。

第一作者简介：邹亚雄(1963—)，男，高级工程师，研究方向为计量技术、气溶胶测量与标准化评定。E-mail：zouyaxiong@qdimt.com。

通信作者简介：任晓庆(1986—)，男，工程师，硕士，研究方向为流体计量技术、多相流测量。E-mail：renxiaoqing@qdimt.com。