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基于电晕放电理论与柴油车尾气微粒自身特殊性质,设计基于电晕放电的线管式柴油车微粒捕集器(DPF,Diesel Particulate Filter).首先建立线管式DPF捕集效率数值计算模型;然后分别对不同结构及不同尾气温度条件下的捕集效率进行数值模拟分析.分析结果表明,该DPF的捕集效率随管道个数增加而增强,随尾气温度的升高而增强,随PM粒径的增大而增强.该DPF可有效捕集柴油汽车尾气中的碳烟粒子(PM),满足流通式颗粒捕集器的技术要求,对保护环境有重要意义.
Based on the theory of corona discharge and the special properties of diesel exhaust particulates, a DPF (Diesel Particulate Filter) based on corona discharge was designed.Firstly, a numerical calculation model of DPF trapping efficiency was established. Then the numerical simulation of the trapping efficiency under different structures and different exhaust gas temperatures was carried out.The results show that the DPF capture efficiency increases with the increase of the number of pipes and increases with the increase of tail gas temperature, The DPF can effectively trap soot particles (PM) in the exhaust gas of diesel vehicles and meet the technical requirements of the flow-through particle trap, which is of great significance for environmental protection.