柴油机内碳烟颗粒破碎的数值模拟  

Numerical Simulation of Soot Fragmentation in Diesel Engine

作　　者：张立淼 景晓军[2] 武政杰 吴少华 Zhang Limiao;Jing Xiaojun;Wu Zhengjie;Wu Shaohua(CATARC Automotive Test Center(Guangzhou)Co.,Ltd,Guangzhou 511340,China;China Automotive Technology and Research Center Co.,Ltd,Tianjin 300300,China;Tianjin Internal Combustion Engine Research Institute,Tianjin 300072,China;National University of Singapore,Singapore 119077,Singapore)

机构地区：[1]中汽研汽车检验中心(广州)有限公司,广州511340 [2]中国汽车技术研究中心有限公司,天津300300 [3]天津内燃机研究所,天津300072 [4]新加坡国立大学,新加坡119077

出　　处：《燃烧科学与技术》2021年第1期98-103,共6页Journal of Combustion Science and Technology

摘　　要：基于离散颗粒群理论,考虑碳烟尺寸影响因素,构建碳烟颗粒动力学模型中破碎模型.采用群体平衡方程建立了碳烟生成破碎的详细数学模型,并采用矩量投影法进行求解.将该破碎模型与参考燃料化学机理TRF机理、KIVA-CHEMKIN程序进行耦合,模拟计算碳烟颗粒在柴油机内的破碎过程.结果表明:加入破碎模型后,后燃阶段缸内碳烟数密度计算结果将增加,破碎模型对主燃阶段碳烟数密度影响反而较小.A new soot fragmentation model is introduced by considering the effect of particle size on fragmentation frequency,which is described using the population balance equations and solved by an advanced moment projection method.This model is coupled with the TRF(toluene reference fuel)reaction mechanism and the KIVACHEMKIN code package to investigate the soot fragmentation process inside the engine cylinder.Results suggest that the inclusion of the fragmentation model in the soot model leads to the prediction of more soot particles at the post-combustion stage,while the influence of the fragmentation model on soot particle number is minor at the main combustion stage.

关 键 词：碳烟 破碎模型 矩量投影法 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]