Engine performance and emissions of a compression ignition engine operating on the diesel-methanol blends
Engine performance and emissions of a compression ignition engine operating on the diesel-methanol blends
复制标题
DOI：
10.1243/095440704773599944
复制
发表时间：
2004-04
期刊：
影响因子：
--
通讯作者：
Z. Huang;H. Lu;D. Jiang;K. Zeng;B. Liu;J. Zhang;X. Wang
中科院分区：
文献类型：
--
作者：
Z. Huang;H. Lu;D. Jiang;K. Zeng;B. Liu;J. Zhang;X. Wang
在压燃式发动机上实现了稳定的柴油-甲醇混合燃料，并对柴油-甲醇混合燃料的性能和排放进行了研究。研究表明，发动机热效率提高，柴油当量b.s.f.c.随着柴油-甲醇混合物的氧质量分数（或甲醇质量分数）的增加而降低，这是由于预混合燃烧阶段的分数增加、氧富集和扩散燃烧阶段的改善。当柴油发动机使用柴油-甲醇燃料混合物操作时，燃料输送提前角的进一步增加将实现更好的发动机热效率。使用柴油-甲醇混合物运行时，可以显着减少废气中的一氧化碳和烟雾。在柴油燃料中添加甲醇后，排气碳氢化合物没有大的变化。氮氧化物的增加与甲醇的质量增加;甲醇添加到柴油燃料被发现有强烈的影响，在高发动机负荷，而不是在低发动机负荷的氮氧化物浓度，和平坦的氮氧化物-烟雾权衡曲线存在时，与柴油-甲醇燃料混合物操作。
A stabilized diesel-methanol blend was realized and a study on the performance and emissions of the diesel-methanol blend was carried out in a compression ignition engine. The study showed that the engine thermal efficiency increases and the diesel equivalent b.s.f.c. decreases with increase in the oxygen mass fraction (or methanol mass fraction) of the diesel-methanol blends due to an increased fraction of premixed combustion phase, oxygen enrichment and improvement in the diffusive combustion phase. Further increase in the fuel delivery advance angle will achieve a better engine thermal efficiency when the diesel engine is operated using the diesel-methanol fuel blends. A marked reduction in the exhaust CO and smoke can be achieved when operating with the diesel-methanol blend. There is not a large variation in the exhaust hydrocarbon with the addition of methanol in diesel fuel. NOx increases with increase in the mass of methanol added; methanol addition to diesel fuel was found to have a strong influence on the NOx concentration at high engine loads rather than at low engine loads, and a flat NOx-smoke trade-offcurve exists when operating with the diesel-methanol fuel blends.