中文摘要：

采用G方程燃烧模型计算火焰传播，采用详细化学反应动力学模型计算已燃区中的后氧化过程和未燃区中的末端混合气自燃，该方法能捕捉火花点火（SI）发动机爆震燃烧过程中的末端混合气自燃、燃烧场中的活性基分布和爆震压力震荡特性。结果表明，SI发动机爆震燃烧过程中，缸内压力分布极不均匀，产生强烈压力冲击和大幅传热。爆震过程中压力波震荡特性基本吻合“鼓模式”，其能量主要集中在第一阶谐振模式。

英文摘要：

The G-equation combustion model was adopted to capture the flame propagation. The detailed chemistry was adopted to model the end gas autoignition in front of the flame front and the post-oxidation process behind the flame front in the burned zone. The model can capture the flame propagation, end gas auto-ignition, active species, and pressure oscillation in a spark ignition engine with knocking combustion. The results indicated that the local in-cylinder pressure is extremely uneven during the knocking process. Pressure gradient leads to pressure oscillation and enhanced heat transfer. The oscillating characteristics are basically consistent with the ＂drum mode＂, and the oscillating energy is mainly focused in the first resonance mode.