正庚烷HCCI燃烧过程的数值模拟及试验研究  

Numerical and Experimental Study on HCCI Combustion Process of n-Heptane

作　　者：俎琳琳[1] 侯玉春[1] 吕兴才[1] 方俊华[1] 黄震[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200030

出　　处：《内燃机工程》2006年第6期15-20,共6页Chinese Internal Combustion Engine Engineering

基　　金：国家"973"重点基础研究项目(2001CB209208);国家自然科学基金重点资助项目(50136040)

摘　　要：结合详细化学动力学机理,运用最新的CHEMKIN-Ⅳ化学动力学软件包中的ICengine模块模拟了正庚烷的HCCI燃烧过程,并在一台高速四缸柴油机上进行了单缸正庚烷HCCI燃烧试验,分别从理论和试验上研究了正庚烷的HCCI燃烧过程以及各种参数变化对燃烧过程的影响,研究表明:正庚烷燃烧过程由低温反应和高温反应两阶段组成,NC7KET裂解生成OH是低温阶段最重要的反应,高温阶段着火是由H2O2裂解所触发的,低温阶段着火对高温阶段着火起着关键作用;各种参数的变化会导致燃烧过程的显著变化。The IC engine model of the up-to-date CHEMKIN-Ⅳ chemical kinetics package with detailed chemical kinetic mechanism was used to simulate the combustion process of HCCI combustion of n-heptane. Expertments were carried out by port injection on a four-stroke diesel engine with one of its cylinder operating on HCCI combustion. The process of HCCI combustion and the influences of different parameters were studied. The results indicate that the combustion of n-heptane is composed of two stage, the low temperature reaction （LTR） and the high temperature reaction （HTR）. The decomposition of NC7KET is the most important reactionat LTR, and the comhustion of HTR is ignited by the composition of H2O2. The combustion process is very sensitive to variable parameters.

关 键 词：内燃机 均质亢量压燃 正庚烷 数值模拟 柴油机 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]