利用废气再循环与米勒循环提高氢内燃机压缩比的研究  

Research on Improving the Compression Ratio of Hydrogen Internal Combustion Engines by Using Exhaust Gas Recirculation and Miller Cycle

作　　者：郝嘉田 孙柏刚[1] HAO Jiatian;SUN Baigang(School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]北京理工大学机械与车辆学院,北京100081

出　　处：《内燃机工程》2021年第5期52-59,共8页Chinese Internal Combustion Engine Engineering

摘　　要：建立了氢内燃机一维模型,分别仿真分析了废气再循环(exhaust gas recirculation,EGR)技术和米勒循环技术对抑制爆震及氮氧化物(NO_(x))排放的效果,最后结合两种技术探索了可达到的最大压缩比和最好的NO_(x)排放性能。结果显示EGR技术对抑制NO_(x)排放更有效,米勒循环对抑制爆震更有效,最终在本研究的工况下,可以将内燃机的压缩比从10.0提升到18.4,指示热效率提升了8.0%,达到了44.87%,同时NO_(x)排放减少了26.2%,达到了1.937 g/(kW·h)。A one-dimensional model of a hydrogen internal combustion engine was built,and the effects of exhaust gas recirculation technology(EGR)and Miller cycle technology on the suppression of knocking and nitrogen oxides(NO_(x))generation were simulated and analyzed.At last,these technologies were combined to explore the maximum achievable compression ratio and the best NO_(x) emission performance.The results show that EGR technology is more effective in suppressing NO_(x) production,while the Miller cycle is more effective in suppressing knocking.Finally,the compression ratio of the internal combustion engine can be increased from 10.0 to 18.4.The efficiency is reduced by 8.0%to 44.87%.And the NO_(x) emissions are reduced by 26.2%to 1.937 g/(kW·h)at the same time.

关 键 词：氢内燃机 废气再循环技术 米勒循环 NO_(x)排放 爆震 仿真模拟 

分 类 号：TK432[动力工程及工程热物理—动力机械及工程]