催化燃烧应用于均质压燃发动机的几种计算模型

通过耦合DETCHEM软件包及CHEMKIN软件包中的SENKIN模块,对活塞顶及活塞冠周边涂有催化剂的HCCI发动机燃烧过程进行了数值计算,建立了多区模型。针对在处理缝隙区存在催化剂时出现的一些问题,提出了4种不同的计算模型,对比分析了这4种计算模型与基准模型在缸内温度、放热率和HC,NOx以及CO排放等方面的差别。

Several Computed Models of Catalytic Combustion for HCCI Engine

Through coupling the DETCHEM package and the SENKIN module of CHEMKIN package, the combustion process of HCCI (homogeneous charge compression ignition) engine whose piston top and side surfaces were coated with catalyst was simulated and the multi-zone model was built. For the appearing problems of dealing with the crevice zone catalyst, four different computational models were put forward. The comparisons between the four computational models and the base model were presented and the differences of combustion temperature, heat release rate and HC, NOx, CO emissions between them were acquired.