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连续再生颗粒捕集器对柴油机颗粒排放的影响
引用本文:楼狄明,温雅,谭丕强,纪丽伟.连续再生颗粒捕集器对柴油机颗粒排放的影响[J].同济大学学报(自然科学版),2014,42(8):1238-1244.
作者姓名:楼狄明  温雅  谭丕强  纪丽伟
作者单位:同济大学汽车学院汽车发动机设计研究所,同济大学汽车学院,同济大学汽车学院,同济大学汽车学院,同济大学汽车学院,上海柴油机股份有限公司
基金项目:13XD1403800
摘    要:以某重型柴油机为原机,研究氧化催化转化器(DOC)与催化型颗粒捕集器(CDPF)耦合而成的连续再生颗粒捕集器(CR-DPF)对柴油机颗粒排放规律的影响.研究结果表明,CR-DPF的安装导致排气温度升高;原机测点颗粒数量浓度呈双峰对数正态分布,CR-DPF的前测点为三峰对数正态分布,后测点则呈多峰对数正态分布;前测点粒径小于191nm颗粒数量浓度及核态颗粒数量浓度分数均高于原机测点;CR-DPF除对7~15nm粒径颗粒的捕集效率相对较低,对其他粒径颗粒具有显著的降低作用;对聚集态颗粒的捕集效果优于核态颗粒,导致后测点核态颗粒数量浓度分数高于前测点.

关 键 词:连续再生颗粒捕集器  颗粒数量浓度  粒径分布  捕集效率
收稿时间:2013/9/29 0:00:00
修稿时间:5/7/2014 12:00:00 AM

Effects of Continuously Regenerating Diesel Particulate Filter on Characteristics of Particle Size Distribution from a Diesel Engine
LOU Diming,WEN Y,TAN Piqiang and JI Liwei.Effects of Continuously Regenerating Diesel Particulate Filter on Characteristics of Particle Size Distribution from a Diesel Engine[J].Journal of Tongji University(Natural Science),2014,42(8):1238-1244.
Authors:LOU Diming  WEN Y  TAN Piqiang and JI Liwei
Institution:School of Automotive Studies, Tongji University,,School of Automotive Studies, Tongji University,School of Automotive Studies, Tongji University,School of Automotive Studies, Tongji University,School of Automotive Studies, Tongji University,Shanghai Diesel Engine Co.,Ltd.
Abstract:A heavy diesel engine was tested on the engine test bench to analyze the two different particulate results emissions of the original engine and the engine with CCRT equipment. Results showed that the application of CCRT increased the exhaust temperature. The particle number size distribution of original engine clearly showed a bimodal and lognormal. The particle number size distribution upstream of the CCRT showed trimodal and turned into multimodal across the CCRT. The test engine with CCRT generated more particles in diameter below 191nm than the original one. The nuclei mode particles upstream of CCRT gave a larger fraction than the original one. Particulate emission decreased dramatically across the CCRT except the particles in diameter ranged from 7nm to 15nm. The reduction ratio of accumulation mode particles was higher than that of nuclei mode particles. This lead to a increase in the proportion of nuclei mode particles downstream.
Keywords:continuously regeneration technology  particle number concentration  size distribution  reduction ratio
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