An experimental evaluation of ultra-lean burn capability of a hydrogen-enriched ethanol-fuelled Wankel engine at full load condition

Preliminary explorations of the performance of a novel small scale opposed rotary piston engine

“…Direct fuel injection [16,17], stratified charge [18], turbocharged intake systems [19] have been applied to enhance the Wankel engine performance. Alternative fuels [17], hydrogen-enriched gasoline [20], hydrogen-enriched ethanol [21], hydrogen-enriched natural gas [22] were used to improve the in-cylinder combustion process as well. Fan et al [23] studied the joint effect of fuel injection timing and angle on fuel/air mixture formation and combustion of a direct injection (DI) natural gas Wankel engine based on 3D simulation.…”

“…In the research, a small injection angle was suggested when the injection timing was at a early stage of intake stroke for the ideal fuel distribution. Amrouche et al [21] indicated that the hydrogen-enriched fuel effectively improved the combustion characteristics due to the wide flammability [24,25], small quenching distance [26], high diffusive and flame propagation velocities [27,28], and broadened lean burn limitations [1,29]. Su et al [15] investigated the combustion and exhaust emission characteristics of a hydrogen-blended n-butanol port injection Wankel engine at part load and stoichiometric conditions.…”

The impact of hydrogen enrichment on the flow field evolution in turbulent explosions

“…The use of hydrogen enriched fuel blends is of increasing practical relevance due to improvements in flame stability under fuel lean conditions with corresponding benefits for reduced carbon dioxide emissions [1][2][3]. The resulting mixture reactivity also has a direct impact on flame propagation speeds and explosion over-pressures and also impacts turbulence-chemistry interactions.…”

Effect of different hydrogen blending ratios on combustion process of gasoline‐fueled rotary engine

“…Amrouche et al . experimentally investigated the effect of hydrogen adjunction on the lean burn and ultralean burn capability of an ethanol‐fueled rotary engine at wide open throttle condition. The results of the experiment showed that the addition of hydrogen efficaciously extended the lean operation limit of the ethanol‐fueled rotary engine and enhanced the engine stability.…”

“…The experimental results indicated that with the enrichment of hydrogen, the corresponding crank angles for peak pressure were advanced and the brake thermal efficiency of the original gasoline rotary engine was increased due to the improved completeness of combustion. Amrouche et al [36,37] experimentally investigated the effect of hydrogen adjunction on the lean burn and ultralean burn capability of an ethanol-fueled rotary engine at wide open throttle condition. The results of the experiment showed that the addition of hydrogen efficaciously extended the lean operation limit of the ethanol-fueled rotary engine and enhanced the engine stability.…”