期刊
FUEL
卷 263, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2019.116366
关键词
Polymethoxydimethyl ether; Reactivity controlled compression ignition (RCCI); Internal combustion engine
资金
- National Key R&D Program of China [2017YFE0102800]
- National Natural Science Foundation of China (NSFC) [51876140]
In this work, a numerical investigation was conducted to explore the combustion characteristics of poly-oxymethylene dimethyl ethers (PODE3)/gasoline Reactivity Controlled Compression Ignition (P/G RCCI) at high load. Firstly, the differences between P/G and Diesel/gasoline (D/G) RCCI are studied and the combustion process is analyzed under both medium and high load conditions. Then, the effects of premix ratio of gasoline (RP), exhaust gas recirculation (EGR) and PODE3 start of injection (PODE3 SOI) on combustion process are further analyzed and discussed. Results reveal that compared with diesel, PODE3 can improve the local equivalence ratio distribution and energy density distribution during the spray combustion process under both medium and high load conditions. Consequently, lower emissions, and higher indicated thermal efficiency (ITE) can be obtained without penalty in pressure rise rate (PRR) and maximum in-cylinder pressure (Pmax), which means that PODE3 has the potential for high load extension. In addition, it is found that lower Rp, together with less EGR and regarded injection timing can be beneficial for both the emission and PRR suppression at high load.
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