CAJ | 학술논문

为了研究边界参数对柴油均质压燃(HCCI)发动机燃烧过程的影响,应用CHEMKIN化学动力学软件包中的SENKIN程序以及正庚烷(n-heptane)氧化反应简化模型,模拟了不同进气温度、进气压力和当量比等边界参数对HCCI发动机燃烧及排放特性的影响.结果表明,在相同当量比条件下,增压可以拓宽HCCI发动机负荷工况范围,同时保持氮氧化物排放基本不变;过浓或过稀的混合气导致CO排放增加;混合气浓度分层增加NO排放.
위료연구변계삼수대시유균질압연(HCCI)발동궤연소과정적영향,응용CHEMKIN화학동역학연건포중적SENKIN정서이급정경완(n-heptane)양화반응간화모형,모의료불동진기온도、진기압력화당량비등변계삼수대HCCI발동궤연소급배방특성적영향.결과표명,재상동당량비조건하,증압가이탁관HCCI발동궤부하공황범위,동시보지담양화물배방기본불변;과농혹과희적혼합기도치CO배방증가;혼합기농도분층증가NO배방.
Both the SENKIN program of the ehemieal kinetic package CHEMKIN and the reduced model for n-heptane oxidation have been used to simulate the ignition and combustion process in diesel Homogeneous Charge Compression Ignition (HCCI) engine. The influences of intake temper-ature, intake pressure and equivalence ratio on HCCI combustion were investigated. The results showed that at constant equivalence ratio, the use of boost pressure can expand the load range of HCCI engine, and keep the NO, emissions little change. When the fuel/air mixture is too lean or too rich, CO emissions increases. Fuel mixture stratification causes the increase of NO emissions.