Combustion characteristics and influential factors of isooctane active-thermal atmosphere combustion assisted by two-stage reaction of n-heptane
Combustion characteristics and influential factors of isooctane active-thermal atmosphere combustion assisted by two-stage reaction of n-heptane
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正庚烷两段反应辅助异辛烷活性热气氛燃烧燃烧特性及影响因素
DOI：
10.1016/j.combustflame.2010.08.009
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发表时间：
2011-02
影响因子：
4.4
通讯作者：
Huang Zhen
中科院分区：
文献类型：
--
作者：
Lu Xingcai;Ji Libin;Ma Junjun;Zhou Xiaoxin;Huang Zhen
本文提出了正庚烷两阶段反应辅助的异辛烷活性热气氛燃烧（ATAC）的实验研究。活性热气氛是通过进气口喷射的正庚烷的低温和高温反应形成的，异辛烷在上止点附近直接喷射到燃烧室中。研究了异辛烷喷射正时、活性热气氛强度、总当量比和预混合比对燃烧特性和排放的影响。实验结果表明，根据正庚烷氧化程度以及异辛烷急冷和充料冷却的效果，异辛烷点火燃烧可分别分为热气氛燃烧、活性气氛燃烧和活性热气氛燃烧。正庚烷当量比、异辛烷当量比和异辛烷输送提前角是主要控制参数。在一个燃烧循环中，异辛烷先于正庚烷点燃并燃烧，这种燃烧现象也可称为双燃料顺序燃烧（DFSC）。整个燃烧事件的点火正时主要由正庚烷当量比决定，同时可以通过调节异辛烷当量比灵活控制。异辛烷点火状态、整体热效率和氮氧化物排放对 20°CA BTDC 和 25°CA BTDC 之间的燃油输送提前角表现出很强的敏感性。
This paper presents an experimental study on the isooctane active-thermal atmosphere combustion (ATAC) which is assisted by two-stage reaction of n-heptane. The active-thermal atmosphere is created by low- and high-temperature reactions of n-heptane which is injected at intake port, and isooctane is directly injected into combustion chamber near the top dead center. The effects of isooctane injection timing, active-thermal atmosphere intensity, overall equivalence ratio, and premixed ratio on combustion characteristics and emissions are investigated. The experimental results reveal that, the isooctane ignition and combustion can be classified to thermal atmosphere combustion, active atmosphere combustion, and active-thermal atmosphere combustion respectively according to the extent of n-heptane oxidation as well as effects of isooctane quenching and charge cooling. n-Heptane equivalence ratio, isooctane equivalence ratio and isooctane delivery advance angle are major control parameters. In one combustion cycle, the isooctane ignited and burned after those of n-heptane, and then this combustion phenomenon can also be named as dual-fuel sequential combustion (DFSC). The ignition timing of the overall combustion event is mainly determined by n-heptane equivalence ratio and can be controlled in flexibility by simultaneously adjusting isooctane equivalence ratio. The isooctane ignition regime, overall thermal efficiency, and NOxemissions show strong sensitivity to the fuel delivery advance angle between 20°CA BTDC and 25°CA BTDC.
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影响因子：
4.4
作者：
H. Machrafi;S. Cavadias
通讯作者：
H. Machrafi;S. Cavadias
DOI：
10.1016/j.proci.2008.08.001
发表时间：
2009
期刊：
--
影响因子：
--
作者：
M. Mehl;T. Faravelli;E. Ranzi;D. Miller;N. Cernansky
通讯作者：
M. Mehl;T. Faravelli;E. Ranzi;D. Miller;N. Cernansky
影响因子：
5.3
作者：
Xingcai Lu;Libin Ji;Junjun Ma;Chen Huang;Zhen Huang
通讯作者：
Xingcai Lu;Libin Ji;Junjun Ma;Chen Huang;Zhen Huang
影响因子：
4.4
作者：
Ra, Youngchul;Reitz, Rolf D.
通讯作者：
Reitz, Rolf D.
影响因子：
7.4
作者：
Xingcai Lu;Wei Chen;Zhen Huang
通讯作者：
Xingcai Lu;Wei Chen;Zhen Huang