Effects of Hydrogen Addition on Premixed Combustion of Kerosene in SI Engine

Spark ignition (SI) engines fueled with kerosene have broad application prospects in unmanned aviation vehicles. The knock phenomenon of SI is a huge challenge, leading to much lower power output than gasoline engines. In this context, the combustion characteristics blending hydrogen are analyzed numerically regarding working conditions an engine. First, delay time kerosene/hydrogen mixture estimated for temperatures 600–1000 K and pressures 15–35 bar using Tay mechanism. effects addition evaluated ratio 0–0.4. sensitivities main reactions that affect discussed. Then, laminar flame speed predicted HYCHEM-SK mechanism, on net reaction rates analyzed. results indicate shortened increased as rises. Meanwhile, decreases except NTC range, increases evidently temperature addition, obviously pressure greater 750 K. However, declines at 600 800 K, while opposite trend exhibits 1000 by 23.85–24.82%, only 4.02–3.59% rises from 0 0.4, which will be beneficial suppression.