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首页> 外文期刊>Journal of Energy Engineering >Comparative Analysis of Effect of Diesel and N-Butanol Blend Properties on Combustion Process and Hydrocarbon Emission at Various Oxygen-Intake Concentrations
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Comparative Analysis of Effect of Diesel and N-Butanol Blend Properties on Combustion Process and Hydrocarbon Emission at Various Oxygen-Intake Concentrations

机译：各种吸氧浓度下柴油和正丁醇混合特性对燃烧过程和碳氢化合物排放影响的比较分析

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摘要

The effects of the cetane number (CN) and latent heat of vaporization (LHV) of diesel-butanol fuel on the hydrocarbon (HC) emission and combustion process at various oxygen intake concentrations (Coxy) were studied in a modified four-cylinder light-duty diesel engine. Three fuels were studied in this experiment: neat diesel (B00), diesel blending with 20% n-butanol by volume (B20), and diesel blending with 20% n-butanol and 0.7% 2-ethylhexyl nitrate by volume (B20+EHN). The conclusion reached is that the ignition delay period has a decisive influence on HC emissions and the combustion process. A comparison of the B20 and B00 fuels reveals that, as Coxy decreases, the degree of the influence of the LHV on in-cylinder combustion temperature (IT) and combustion duration (CD) gradually increases, and the degree of influence of CN gradually decreases. Additionally, the increasing in-cylinder average temperature difference is the primary factor for the increase in the difference between the HC emissions of the two fuels, whereas the influence of CD is relatively weak. A comparison of the B20+EHN with B20 fuels revealed their different in-cylinder average temperatures that resulted from the influence of their CN on the combustion phase were mainly responsible for the different HC emissions of the two fuels; this difference becomes increasingly obvious as Coxy decreases.
机译：在改进的四缸发动机上研究了柴油/正丁醇燃料的十六烷值（CN）和汽化潜热（LHV）对各种氧气吸入浓度（Coxy）的烃（HC）排放和燃烧过程的影响。轻型柴油发动机。在此实验中研究了三种燃料：纯柴油（B00），按体积计20％的正丁醇与柴油的掺混物（B20）和按体积计20％的正丁醇和0.7％硝酸2-乙基己酯与柴油的掺混物（B20 + EHN ）。得出的结论是，点火延迟时间对HC排放和燃烧过程具有决定性的影响。 B20和B00燃料的比较表明，随着Coxy的降低，LHV对缸内燃烧温度（IT）和燃烧持续时间（CD）的影响程度逐渐增大，而CN的影响程度逐渐减小。另外，缸内平均温度差的增加是两种燃料的HC排放之间差值增加的主要因素，而CD的影响相对较弱。 B20 + EHN与B20燃料的比较显示，由于CN对燃烧相的影响，其缸内平均温度不同，这是两种燃料HC排放不同的主要原因。随着Coxy的减少，这种差异变得越来越明显。

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