A Skeletal Chemical Kinetic Model of PRF Oxidation for HCCI Engines

作者：Zhang, Qingfeng; Zheng, Zhaolei^*; He, Zuwei; Wang, Ying

来源：International Journal of Chemical Reactor Engineering, 2011, 9(1): A52.

DOI：10.2202/1542-6580.2527

• primary reference fuel (PRF)
• chemical kinetic model
• ignition delay
• homogenous charge compression ignition (HCCI)

A skeletal chemical kinetic mechanism, including 42 species and 71 reactions for the oxidation of primary reference fuel (PRF), was developed and applied to model homogeneous charge compression ignition (HCCI) combustion after various experiments and available mechanisms for PRF oxidation being reviewed and the performance of mechanisms applied to experiments relevant to HCCI engines being analyzed. The ignition delay predicted by the skeletal mechanism showed good agreement with experiments for different fuels over the temperature range 667-1350K. Validation was also performed with experiments from HCCI engines, and good agreement was obtained for the primary reference fuels. The results show that the present PRF mechanism gives reliable performance for HCCI combustion predictions. Sensitivity analysis indicates that for PRF70 and PRF91.8 under HCCI conditions, H-atom abstraction from iso-octane molecule reaction and OH addition to n-heptane molecule have large influence, and CH2O, CH3 are very important intermediate species.

• 出版日期2011
• 单位重庆大学