Autoignition of n-heptane and butanol isomers blends in a constant volume combustion chamber
Autoignition of n-heptane and butanol isomers blends in a constant volume combustion chamber
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正庚烷和丁醇异构体混合物在定容燃烧室中的自燃
DOI：
10.1016/j.fuel.2019.115638
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发表时间：
2019-10
期刊：
影响因子：
7.4
通讯作者：
Han Dong
中科院分区：
文献类型：
--
作者：
Liang Xin;Zhong Anhao;Sun Zuoyu;Han Dong
在定容燃烧室中研究了柴油的典型替代燃料正庚烷与丁醇异构体（正丁醇、异丁醇和仲丁醇）的二元燃料的自燃特性。在改变丁醇体积分数、燃烧室温度和当量比的条件下，比较了二元燃料自燃过程的着火延迟时间、燃烧延迟时间、压力和放热速率曲线。实验结果表明，随着丁醇含量的增加，二元燃料的自燃倾向降低，表现为放热相位延迟和两阶段放热行为。丁醇异构体对正庚烷的自燃抑制作用大小顺序为异丁醇>仲丁醇>正丁醇。此外，提高燃烧室温度和提高当量比都可以缩短着火和燃烧延迟期。具体地说，增加室温度单调升高的峰值热释放在贫燃料的条件下，然而，观察到的转折温度的峰值热释放的趋势在当量比为0.64。此外，增加当量比显着提高峰值压力和放热速率。
The autoignition characteristics of binary fuels of n-heptane, a typical surrogate of diesel fuel, and butanol isomers (n-butanol, i-butanol and s-butanol), were investigated on a constant volume combustion chamber. The ignition and combustion delay times, pressure and heat release rate traces in the autoignition processes of binary fuels were compared at changed butanol volume fractions, chamber temperatures and equivalence ratios. The experimental results revealed that the autoignition tendency of binary fuels were decreased with the increase of butanol fraction, evidenced by the retarded heat release phasing and the two-stage heat release behavior. Among the three butanol isomers, the autoignition inhibition effects of butanol isomers on n-heptane was in the order of i-butanol > s-butanol > n-butanol. In addition, both increased chamber temperature and increased equivalence ratio could shorten the ignition and combustion delays. Specifically, increased chamber temperature monotonically elevated the peak heat release at the fuel-lean conditions, however, a turning temperature was observed in the trend of the peak heat release at the equivalence ratio of 0.64. Moreover, increased equivalence ratio significantly promoted the peak pressures and heat release rates.
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影响因子：
5.3
作者：
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DOI：
10.1016/j.proci.2010.06.163
发表时间：
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期刊：
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影响因子：
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作者：
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通讯作者：
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影响因子：
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影响因子：
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通讯作者：
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