端面和周边进气转子机混合气形成与燃烧特性的对比研究

Based on CONVERGE, a three-dimensional model of gasoline/hydrogen dual-fuel rotary engine verified by experiments was constructed to compare and analyze the effects of end-face intake and peripheral intake on the in-cylinder flow field, combustion process, and the formation and distribution of emissions of the hydrogen-doped rotor machine. The results show that: the variation rules of in-cylinder flow field are similar between the two types of air intake; the swirl volume of end-face air intake has a larger variation amplitude; the in-cylinder flow velocity of end-face air intake is 7 m/s faster than that of peripheral air intake at the time of ignition; the combustion process of end-face air intake has a higher generation of OH, H, O, and a faster flame propagation process than that of peripheral air intake; the peak cylinder pressure and the maximal temperature of both types of cylinder pressure and the maximal temperature of the two types of cylinder pressure and flame propagation process are both higher with the increase of the doping amount; the peripheral air intake is smaller than the peripheral air intake under the same working condition. The peripheral air intake is smaller under the same working condition. When the exhaust valve is open, the NO emissions of end-face intake and peripheral intake are 0.148 mg and 0.146 mg, respectively, and the CO emission of end-face intake is 6.6% lower than that of peripheral intake.