高涡流条件下船用柴油机油气匹配研究
Research on Fuel-air Matching of Marine Diesel Engine under High Swirl Conditions
本研究针对低速二冲程船用柴油机，提出了缸内直接喷射新鲜空气 (IFA) 策略，在不影响扫气效率的基础上显著提升缸内涡流，通过CONVERGE数值模拟研究了其对缸内油气混合过程、燃烧及排放性能的影响。研究结果表明，IFA策略可有效提高缸内涡流，进而优化油气混合过程，改善燃烧性能。通过正交试验设计协同涡流面喷油角度、纵截面喷油角度两个关键喷油参数，获得最佳工况时热效率由Base工况的49.92%提升至51.97%。在高涡流及喷油参数优化的基础上，使用…查看全部>>
In this study, the method named inject fresh air (IFA) technology is proposed in order to significantly improve the swirl ratio without affecting the scavenging efficiency. The effects on the fuel/air mixing process, combustion, and emission performance are studied by numerical simulation. The research results indicate that IFA technology can effectively increase the level of in-cylinder swirl by injecting fresh air directly into the cylinder, thereby optimi…查看全部>>
卢天龙;王天友;施磊;鲁祯;
TK422
marine diesel engine inject fresh air high swirl ratio optimization of fuel injection parameters
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