摘要
本文提出一个新的直喷式柴油机燃烧分析模型,该模型利用台架实验数据计算燃空混合率、放热率、NO_x生成率等燃烧过程参数,研究燃烧系统参数对燃烧过程的影响,分析充量间传热传质过程及其影响因素。本模型已用于天津动力机厂130柴油机燃烧系统改进的研究。结果表明,强化扩散燃烧阶段缸内空气与产物间紊流混合率可减少NO_x排放量,预计适当提高130柴油机空气涡流将会改善高、低转速工况的综合排放特性。
A phenomenological combustion model for a D.I. diesel engine was developed for elucidating the effects of combustion system parameters on diesel combustion by inputting the conventional engine test data. A submodel for the mass and heat transfer among the air, fuel spray and combustion products was derived for studying the formation of NO_x The results of this study showed that the main approach to reduce NO* emission is to enhance the turbulent mixing, especially during the diffusion combustion phase, and that a suitable air swirl is favorable to the net reduction of NO_x although it might promote NO, formation during the premixed combustion phase.
出处
《内燃机学报》
EI
CAS
CSCD
北大核心
1991年第3期213-220,共8页
Transactions of Csice
基金
国家自然科学基金
关键词
柴油机
燃烧
分析模型
NOx生成
Diesel Combustion
Combustion Model
Turbulent Mixing
NO_x Formation