基于平均反应率的现象学碳烟氧化模型研究及应用  

A Phenomenological Model for Soot Oxidation in Diesel Engine Based on Average Reaction Rate

作　　者：石秀勇[1] 李国祥[1] 周雷[1] 

机构地区：[1]山东大学能源与动力工程学院,山东济南250061

出　　处：《内燃机学报》2008年第2期161-167,共7页Transactions of Csice

基　　金：山东省自然科学基金项目(Y2007F26)

摘　　要：提出了一个基于平均反应率的现象学耦合碳烟氧化模型,将其应用于柴油机数值模拟中,并结合试验的方法研究了后喷射对碳烟排放的影响。将Hiroyasu碳烟生成模型和提出的碳烟氧化模型集成在CFD源程序中构建多维模型,根据不同的后喷射方案计算碳烟的生成和氧化历程,同时结合试验数据分析后喷射影响碳烟氧化的各种因素。研究结果表明,采用提出的碳烟模型和试验方法能真实地反映柴油机碳烟的生成和氧化历程以及后喷射对碳烟排放的影响规律,对柴油机满足低排放的研究具有一定参考价值。A phenomenological coupling model for soot oxidation was developed to investigate the oxidation of soot in DI diesel engine based on an average reaction rate. The effect of post-injection on engine soot emission was presented. The Hiroyasu model for soot formation and the proposed soot oxidation model were integrated into the CFD code FIRE. Simulation on soot formation and oxidation was performed for different post-injection quantities and intervals. Various influencing factors of soot oxidation were analyzed by referencing the experimental data. The model can reflect the processes of soot formation and oxidation and the effect of post-injection on the soot oxidation, providing the reference to the study of low emission DI diesel engine.

关 键 词：柴油机 碳烟氧化 平均反应率模型 数值模拟 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]