摘要
以提升柴油机颗粒捕集器(DPF)的性能为目的,该文运用AVL-Boost软件建立柴油机后处理仿真模型,并对其可信性进行验证分析,通过分析孔目数、壁厚、直径与长度对DPF压降特性的影响,并基于DPF捕集机理,分析了排气参数和孔隙率等对DPF捕集效率的影响。结果表明:当碳载量一定时,增加孔目数、减少壁厚与长径比,有利于降低DPF压降;在一定范围内减小微孔直径与排气流量可以提高DPF捕集效率;在结构参数中,孔隙率对捕集效率影响最大。应用响应面分析对DPF结构参数进行优化,结果表明:当孔密度为0.62,壁厚为0.19mm,长度为288.39mm,直径为163.64mm,孔隙率为0.28时,DPF综合捕集效率能够保持在98%以上。
This article aims to improve the performance of the diesel particulate filter(DPF).The simulation model of DPF was es⁃tablished by AVL-Boost software,and its credibility was verified and analyzed by comparing simulation and test results.By ana⁃lyzing the influence of cell density,wall thickness,diameter and length on the pressure drop characteristics of the DPF,and based on the DPF capture mechanism,the effects of exhaust parameters and porosity on the DPF capture efficiency were analyzed.The results show that when the carbon load is constant,increasing cell density,reducing the wall thickness and the ratio of length and diameter will help reduce the DPF pressure drop;within a certain range,less particle diameter and exhaust flow can increase the DPF capture efficiency;among the structural parameters,the porosity has the greatest impact on the capture effi⁃ciency.Response surface analysis was applied to optimize the DPF structural parameters,the results show that when the cell den⁃sity is 400 cpsi,the wall thickness is 0.19mm,the length is 288.39mm,the diameter is 163.64mm,and the porosity is 0.28,the DPF comprehensive capture efficiency can be maintained at more than 98%。
作者
马好娜
王铁
石晋宏
宇文浩男
MA Hao-na;WANG Tie;SHI Jin-hong;YUWEN Hao-nan(Department of Vehicle Engineering,Taiyuan University of Technology,Shanxi Taiyuan 030024,China)
出处
《机械设计与制造》
北大核心
2024年第9期30-35,共6页
Machinery Design & Manufacture
基金
中型载货车平台燃料电池动力系统与整车集成技术(20181102006)。
关键词
颗粒捕集器
压降特性
捕集效率
响应面分析
Particulate Filter
Pressure Drop Characteristics
Capture Efficiency
Response Surface Analysis
作者简介
马好娜,(1997-),女,河南平顶山人,硕士研究生,主要研究方向:清洁燃料发动机燃烧与排放;王铁,(1957-),男,河北安国人,博士研究生,教授,主要研究方向:清洁燃料发动机应用。
