进气氧浓度对转子机燃烧过程的影响研究
Study on the influence of inlet oxygen concentration on the combustion process of the rotaryengine
利用CONVERGE燃烧模拟软件，建立符合富氧汽油转子机燃烧规律的CFD模型，与工况一致下的实验值相比，证明模型可用性。对不同氧气浓度下汽油转子机的燃烧数值进行模拟，分析富氧燃烧状态下转子机缸内火焰传播，燃烧特性和排放的生成过程。当氧气浓度升高时，气缸内火焰温度提升，未燃区面积逐渐缩小，燃烧区域的体积增大，火焰面积向燃烧室后部区域略有扩展；火花塞周边区域的湍动能逐渐升高，火焰传播速度提升；缸内压力峰值有明显提高，其所对应的曲轴转角也相应提前，缸内…查看全部>>
Based on CONVERGE, a three-dimensional CFD model of a gasoline Wankel rotary engine is built and validated. The combustion process of the rotary engine under different oxygen concentrations was carried out to analyze in-cylinder flame propagation, combustion characteristics and emissions formation. The results showed that with the increment of oxygen concentration, flame temperature increased within the cylinder, unburned area decreased, the volume of the co…查看全部>>
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