中文摘要：

代表性互动小火焰（RIF）模型在计算准确性和经济性上的优势使它非常适用于内燃机燃烧过程的模拟．论述了RIF模型的基本原理，并在KIVA-3V2平台上补充了层流小火焰求解程序和β函数形式的概率密度函数积分程序，开发出KIVA-RIF软件，从而实现了RIF模型的求解．应用正庚烷简化机理对一单缸Caterpillar3400重型直喷柴油机在基准工况下的燃烧和污染物生成过程做了数值模拟，预测的着火延迟、缸内压力、放热率和污染物排放量与试验结果吻合良好，并根据模拟结果讨论了湍流对燃烧的影响和缸内火焰结构、污染物的分布．

英文摘要：

The Representative Interactive Flamelets （RIF）model is specifically suitable for the simulation of combustion process in internal combustion engines due to its precision of calculations and reasonable computational cost. In this paper, the basic principle of the model is presented. Based on KIVA-3V2 code, a new version named KIVA-RIF was developed which incorporated the RIF model. Combustion characteristics and pollutants formation processes in a single-cylinder of Caterpillar 3400 series heavy-duty diesel engine is simulated under the baseline operating condition using a reduced n-heptane chemical reac- tion mechanism. The predicted ignition delay, in-cylinder pressure, heat release rate and pollutants emissions show good agreements with the experimental data. The influence of turbulence on combustion, incylinder flame structure and distribution of pollutants are discussed.