摘要
基于外加热源再生性能测试台架,采用便携式固体颗粒物计数仪,研究soot沉积方式和颗粒可溶性有机组分(SOF)对柴油机颗粒捕集器(DPF)出口颗粒排放的影响.结果表明:无过渡段沉积后,DPF再生效率和总质量浓度随再生温度增加而增加,升温阶段出口颗粒物以核态为主,再生阶段DPF载体内部出现温度波峰且出口颗粒物以积聚态为主;添加50 cm过渡段沉积后,再生效率和总质量浓度同样随再生温度增加而增加,575℃以下再生时,升温和再生阶段出口颗粒物均以核态为主;575℃再生时,升温阶段颗粒物以核态为主,再生阶段以积聚态为主.SOF能促进DPF再生,其质量分数越高,DPF再生效率和总质量浓度越高,再生时出口颗粒物趋向于核态.
Based on the regeneration performance testing bench,the effects of soot deposition characteristic and soluble organic fraction(SOF)content on particle emission at the diesel particulate filter(DPF)outlet were studied with the protable solid particle counter.The results show that,when the transition length is 0 cm,the DPF regeneration efficiency and total mass concentration increase with the increase of regeneration temperature,and the particle diameter at the DPF outlet is mainly the nuclear mode.Besides,during the regeneration process,the temperature peak appears inside the DPF and the particles at the outlet are mainly accumulated mode.When the transition length is 50 cm,the regeneration efficiency and total mass concentration also increase with the increase of regeneration temperature.When the regeneration temperature is below 575℃,the particles at the outlet during the heating and regeneration stage are mainly nuclear mode.When the regeneration temperature reaches 575℃,the particles are dominated by the nuclear mode in the heating stage,while the accumulate mode is dominant in the regeneration stage.In addition,SOF could promote the DPF regeneration,the higher mass percentage of SOF,the higher DPF regeneration efficiency and total mass concentration.The average particle diameter of the particles tends to the nuclear mode.
作者
孟忠伟
李鉴松
秦源
蒋渊
廖健雄
方嘉
Meng Zhongwei;Li Jiansong;Qin Yuan;Jiang Yuan;Liao Jianxiong;Fang Jia(Key Laboratory of Fluid and Power Machinery,Ministry of Education,Xihua University,Chengdu 610039,China;Vehicle Measurement,Control and Safety Key Laboratory of Sichuan Province,Xihua University,Chengdu 610039,China;Department of Mechanical and Electrical Engineering,Nanchong Vocational and Technical College,Nanchong 637131,China)
出处
《内燃机学报》
EI
CAS
CSCD
北大核心
2020年第4期342-350,共9页
Transactions of Csice
基金
国家自然科学基金资助项目(51676167)
四川省科技厅青年科技创新研究团队资助项目(2017TD0026)
四川省教育厅科研创新团队资助项目(17TD0035)
西华大学校重点科研资助项目(Z17101).
关键词
柴油机颗粒捕集器
过渡段长度
再生
可溶性有机组分
颗粒排放
diesel particulate filter(DPF)
transition length
regeneration
soluble organic fraction(SOF)
particle emission
