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基于柴油机微粒捕集器瞬态复合再生机理,建立了CFD三维仿真模型,并利用漩涡破碎燃烧模型和场协同数学模型对柴油机微粒捕集器瞬态复合再生过程的速度矢量和温度梯度进行了数值模拟和场协同分析,结果表明,再生时间为175 s时的微粒捕集器过滤体后端壁面峰值温度达到1 184 K,且其过滤体内速度矢量和温度梯度的协同度最好,最优燃烧再生区域所占最大比值为0.58,表明此时微粒捕集器过滤体内再生燃烧速率最大,其再生效率最高。
Based on the transient compound regeneration mechanism of diesel particle traps, a three-dimensional CFD simulation model was established and the velocity vector and temperature gradient of diesel particulate traps transient composite regeneration process were numerically calculated by using vortex-crushing combustion model and field synergistic mathematical model Simulation and field collaborative analysis showed that the peak temperature of the trailing wall of the particle filter reached to 1 184 K when the regeneration time was 175 s, and the synergy degree of velocity vector and temperature gradient in the filter body was the best. The optimal combustion Recycling area accounted for the largest ratio of 0.58, indicating that the particulate filter at this time the maximum regeneration rate of combustion, the highest regeneration efficiency.