Experimental studies on combustion and emissions of RCCI (reactivity controlled compression ignition) with gasoline/n-heptane and ethanol/n-heptane as fuels
Experimental studies on combustion and emissions of RCCI (reactivity controlled compression ignition) with gasoline/n-heptane and ethanol/n-heptane as fuels
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以汽油/正庚烷和乙醇/正庚烷为燃料的RCCI（反应性控制压缩点火）燃烧和排放实验研究
DOI：
10.1016/j.energy.2015.05.083
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发表时间：
2015-08
期刊：
影响因子：
9
通讯作者：
Xingcai Lu
中科院分区：
文献类型：
--
作者：
Yong Qian, Xiaole Wang, Lifeng Zhu;Xingcai Lu
本文对单缸发动机采用正庚烷缸内直喷与乙醇和汽油进气口喷射相结合的RCCI（反应控制压缩点火）燃烧和排放特性进行了实验研究。结果表明，当系统以特定的单循环总热值较低的乙醇/正庚烷为燃料时，RCCI燃烧的点火延迟大大增加，但对于较大的预混比，缸内温度和压力下降严重。在增加预混比的条件下，RCCI 燃烧的氮氧化物和烟尘排放得到显着改善。在不同预混比例下，汽油/正庚烷的HC（碳氢化合物）排放量低于乙醇/正庚烷，但NOx和烟尘排放量高于乙醇/正庚烷。当预混比约为0.57时，汽油/正庚烷和乙醇/正庚烷的指示热效率均达到最大值。当使用乙醇/正庚烷燃料时，随着发动机负荷的增加，CO、NOx和烟尘排放量低于使用汽油/正庚烷燃料时，但HC排放量较高。当 IMEP（指示平均有效压力）高于 6 bar 时，乙醇/正庚烷的指示热效率高于汽油/正庚烷。在重载时，乙醇是在 RCCI 模式下替代汽油作为端口喷射燃料的良好候选者。
This paper presents an experimental study on the combustion and emissions characteristics of RCCI (reactivity controlled compression ignition) combustion in which in-cylinder direct injection of n-heptane combined with port injection of ethanol and gasoline, respectively, are used with a single-cylinder engine. Results show that, when the system is fueled with ethanol/n-heptane at a specific overall lower heating value per-cycle, the ignition delay of RCCI combustion increases greatly but the in-cylinder temperature and pressure drop severely for a larger premixed ratio. NOx and soot emissions are significantly improved for RCCI combustion under conditions of increased premixed ratio. At different premixed ratios, the HC (hydrocarbon) emission of gasoline/n-heptane is lower than that of ethanol/n-heptane, but the NOx and soot emissions are higher than those obtained with ethanol/n-heptane. When the premixed ratio is approximately 0.57, the indicated thermal efficiencies of both gasoline/n-heptane and ethanol/n-heptane reach their maximum values. When fueled with ethanol/n-heptane along with the increase in engine load, CO, NOx and soot emissions are lower than fueled with gasoline/n-heptane, but the HC emissions are higher. When IMEP (indicated mean effective pressure) is higher than 6 bar, the indicated thermal efficiency of ethanol/n-heptane is higher than that of gasoline/n-heptane. Ethanol is a good candidate to replace gasoline as port injected fuel in RCCI mode at heavy loads.
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DOI：
10.4271/2012-01-0383
发表时间：
2012-04
期刊：
--
影响因子：
--
作者：
D. Splitter;M. Wissink;S. Kokjohn;R. Reitz
通讯作者：
D. Splitter;M. Wissink;S. Kokjohn;R. Reitz
DOI：
10.4271/2011-01-0363
发表时间：
2011-04
期刊：
--
影响因子：
--
作者：
D. Splitter;R. Hanson;S. Kokjohn;R. Reitz
通讯作者：
D. Splitter;R. Hanson;S. Kokjohn;R. Reitz
影响因子：
7.4
作者：
Xingcai Lu;Yuchun Hou;Linlin Zu;Zhen Huang
通讯作者：
Xingcai Lu;Yuchun Hou;Linlin Zu;Zhen Huang
DOI：
10.4271/2014-01-2682
发表时间：
2014-10
期刊：
--
影响因子：
--
作者：
Yong Qian;Lifeng Zhu;Zhen Huang;Xingcai Lu
通讯作者：
Yong Qian;Lifeng Zhu;Zhen Huang;Xingcai Lu
影响因子：
4.6
作者：
F. N. Alasfour
通讯作者：
F. N. Alasfour