Investigation on combustion characteristics of cyclopentanol/diesel fuel blends in an optical engine
Investigation on combustion characteristics of cyclopentanol/diesel fuel blends in an optical engine
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环戊醇/柴油混合燃料在光学发动机中的燃烧特性研究
DOI：
10.1016/j.renene.2020.11.155
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发表时间：
2021-01-15
期刊：
影响因子：
8.7
通讯作者：
Zhou, Chenglong
中科院分区：
文献类型：
--
作者：
Chen, Hao;Su, Xin;Zhou, Chenglong
环戊醇是一种很有前途的汽车生物燃料替代品。在本研究中，利用光学发动机研究了环戊醇掺合比例对燃烧特性的影响。将环戊醇以10%和20%的体积与柴油混合，分别记为CP10和CP20。在三种喷射压力（100、120和140 MPa）和四种喷射正时(上死点后-6度、-9度、-12度和15度曲柄角（CA ATDC度）下，对混合气和柴油（用D100表示）进行了对比试验。实验结果表明，环戊醇的加入延长了点火延迟，缩短了燃烧时间，提高了指示热效率。随着喷射压力的增大或喷射时间的提前，峰值燃烧压力（pcp）和峰值放热率（PHRRs）均增加。与D100相比，环戊醇/柴油混合燃料的pcp和phrr均较低，且随环戊醇比的增加而降低。在柴油中掺入环戊醇能有效降低油烟排放，但随着喷射压力的增大或喷射时间的提前，降低效果减弱。在燃烧和排放的综合评价中，CP10优于CP20，特别是在-12度CA ATDC的喷射时刻，喷射压力为140 MPa。(c) 2020 Elsevier Ltd.版权所有。
Cyclopentanol is a promising alternative biofuel for automobiles. In this study, an optical engine was employed to investigate the effects of cyclopentanol blending ratios on combustion characteristics. Cyclopentanol was blended with diesel by 10% and 20% volume, denoted as CP10 and CP20, respectively. Comparison tests between blends and diesel (denoted as D100) were performed under three injection pressures (100, 120, and 140 MPa) and four injection timings (-6 degrees,-9 degrees,-12 degrees and-15 degrees crank angle after top dead center (degrees CA ATDC)). The experimental results indicated that the addition of cyclopentanol prolongs the ignition delay, shortens the combustion duration and improves the indicated thermal efficiency. As the injection pressure increases or the injection timing advances, the peak combustion pressures (PCPs) and peak heat release rates (PHRRs) increase. Compared to D100, the PCPs and PHRRs of cyclopentanol/diesel fuel blends are lower and decrease with the increase of cyclopentanol ratio. Blending cyclopentanol in diesel is effective in reducing soot emission, and the reduction effect weakens as the injection pressure increases or the injection timing advances. CP10 is superior to CP20 according to the comprehensive evaluation of combustion and emission, especially at the injection timing of -12 degrees CA ATDC under the injection pressure of 140 MPa. (c) 2020 Elsevier Ltd. All rights reserved.