首页 | 本学科首页   官方微博 | 高级检索  
     


Numerical study of hydrogen addition to DME/CH4 dual fuel RCCI engine
Authors:Jie Liu  Fuyuan YangHewu Wang  Minggao Ouyang
Affiliation:State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Tsinghua 100084, PR China
Abstract:In this study, the effect of hydrogen addition to DME/CH4 dual-fuel RCCI (Reactivity Controlled Compression Ignition) engine is investigated using three dimensional calculations coupled with chemical kinetics. A new reduced DME (Dimethyl Ether) oxidation mechanism is proposed in this study. With the addition of H2, the ignition time is advanced and the peak cylinder pressure is increased. The addition of hydrogen has a greater effect on the beginning stage of combustion than the later stages of combustion. The CH4 emission is reduced with the addition of H2. However, as the flame does not propagate throughout the charge, the CH4 emission is still high. The CO emission is reduced and most of the remaining CO is produced by the combustion of the premixed CH4. With the addition of hydrogen, NO emission is increased. The simulation shows that the final NOx emissions are significantly determined by the injection strategy and quantity of the pilot fuel during dual fuel operation conditions.
Keywords:RCCI   Hydrogen   Dual fuel   Chemical kinetics
本文献已被 ScienceDirect 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号