최대 부하 조건에서 수소 예혼합 방식 로터리 엔진의 연소 특성에 대한 수치 해석 연구

초록

This study presents a numerical investigation on the combustion characteristics of a hydrogen premixed rotary engine under maximum load conditions. By utilizing a two-stroke Wankel engine model, the research explored the combustion process, focusing on the intake, compression, and combustion phases at 3,000 RPM. The intake mixture of hydrogen and fresh air was set at stoichiometry under the intake pressure of 101 kPa, which corresponded to the maximum torque operation of a naturally aspired engine. The findings highlighted the advantages of hydrogen as a fuel, including its high flame propagation speed and superior knocking suppression characteristics. A short ignition delay of -7 CA achieved the increase in peak pressure at just 2 CA after the start of combustion. Knocking was not observed despite the advanced start of combustion. The study also examined the impact of turbulence on combustion efficiency. The results demonstrated that hydrogen rotary engines could achieve significant performance improvements, making them a promising solution for carbon-neutral internal combustion engines.

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