汽油机末端气体焰前反应化学动力学模拟的计算方法

Computation Methods in a Chemical Kinetics Simulation of End Gas Pre Flame Reaction in SI Engine

利用含有２９个反应式的简化模型对末端气体的焰前反应进行了模拟计算，可以计算出反应过程中的温度、浓度等细节，并由此预测爆震的发生。为实现上述目标，计算方法的选取是关键，本文利用了先进的吉尔（ＧＥＡＲ）算法，由于能够自动变步长地控制精度。

A reduced kinetic model including 29 reactions is used in simulation of pre flame reaction to provide the reaction cedure details,such as spices concentration,temperature history,etc.,in order to predict knock.Calculation method is a key factor,and we used a special method,GEAR method,which controls calculation steps automatically to keep enough precision.The results were encouraging in both calculation speed and precision.