姚 塽,汪侃,张许扬,等.汽油机颗粒捕集器再生平衡状态的仿真研究[J].内燃机工程,2021,42(3):93-99.
汽油机颗粒捕集器再生平衡状态的仿真研究
Simulation Study on the Regeneration Equilibrium State of the Gasoline Particulate Filters
DOI：10.13949/j.cnki.nrjgc.2021.03.014
关键词:汽油机颗粒捕集器  再生平衡状态  压降  颗粒物
Key Words:gasoline particulate filter  regeneration equilibrium state  pressure drop  particle
基金项目:柴油机排气颗粒物氧化反应机理研究
作者单位E-mail
姚 塽 天津大学 内燃机燃烧学国家重点实验室,天津 30007 yao_shuang@tju.edu.cn 
汪侃 襄阳达安汽车检测中心有限公司  
张许扬 天津大学 内燃机燃烧学国家重点实验室,天津 30007  
宋崇林* 天津大学 内燃机燃烧学国家重点实验室,天津 30007 songchonglin@tju.edu.cn 
雷海洋 天津大学 内燃机燃烧学国家重点实验室,天津 30007  
吕刚 天津大学 内燃机燃烧学国家重点实验室,天津 30007  
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摘要:使用流体仿真软件AVL-FIRE建立了缸内直喷汽油机颗粒捕集器(Gasoline Particulate Filter，GPF)的数值模型，并根据相关试验数据验证了模型的准确性。模拟计算了不同排气参数下的GPF压降及积炭量，以此分析了排气氧浓度、NO浓度及排气温度等参数对GPF再生平衡状态的影响。结果表明：氧浓度越高有利于达到再生平衡状态，在排气温度为800K的条件下，当氧气的质量浓度为2%时，GPF不能达到再生平衡状态，当氧气的质量浓度由2%增加到7%时，GPF可达到再生平衡状态；NO浓度对GPF压降有较大的影响，在排气温度为800K及氧气的质量浓度为7%的条件下，当NO的质量浓度由0.0%增加到0.2%时，再生平衡状态下GPF的压降减少了11.6%；升高排气温度有利于GPF达到再生平衡状态，在氧气质量浓度为2%的条件下，当排气温度由800K增加到1000K时，GPF可达到再生平衡状态。
Abstract:A numerical model of the direct injection gasoline engine particulate filter (GPF) was established using the numerical simulation software AVL-FIRE, and the model was verified based on relevant experimental data. The effects of exhaust parameters including exhaust oxygen concentration，NO concentration and exhaust temperature on the GPF regeneration equilibrium state are analyzed through calculating the pressure drop and carbon load of the GPF under different exhaust parameters. The results showed that: The higher oxygen concentration is beneficial for reaching the regeneration equilibrium state. With the exhaust temperature of 800K, GPF can’t reach the regeneration equilibrium when the oxygen mass concentration is 2%, and GPF can reach the regeneration equilibrium state when the oxygen mass concentration is increased from 2% to 7%. NO mass concentration has a great impact on the pressure drop of GPF. With the exhaust temperature of 800K and the oxygen mass concentration of 7%, the pressure drop in the regeneration equilibrium state decreased by 11.6% as the exhaust NO mass concentration is increased from 0.0% to 0.2%. The higher temperature is helpful to reach the regeneration equilibrium state for GPF. At the oxygen mass concentration of 2%, GPF can reach the regeneration equilibrium state when the exhaust temperature is increased from 800K to 1000K.
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