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首页> 外文期刊>Applied Energy >Co-evaporative multi-component fuel design for in-cylinder PLIF measurement and application in gasoline direct injection research
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Co-evaporative multi-component fuel design for in-cylinder PLIF measurement and application in gasoline direct injection research

机译：缸内PLIF共蒸发多组分燃料设计及其在汽油直喷研究中的应用

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摘要

For in-cylinder fuel mixture distribution measurement, a method for designing a multi-component fuel for planar laser-induced fluorescence (PLIF) experiments is developed based on thermal gravity analysis and vapor-liquid equilibrium calculation. The goal is to create fuel that has a volatility similar to real gasoline and good co-evaporation ratios (near 1.0) with tracers. Acetone, toluene, and trimethylbenzene are chosen as tracers for light, medium, and heavy fractions, respectively, and a five-component test fuel is developed. The test fuel is used to study the influence of components and temperature on co-evaporation ratios. Any variation in tracer or fuel component proportions affects all co-evaporation ratios, but a variation within 5% is considered acceptable. Results show that acetone presents the most significant influence on co-evaporation ratios. Temperature is also a key factor. Saturated vapor pressure and activity coefficient of the tracer and components in a fraction group affect co-evaporation optimization substantially, indicating that these values are a primary consideration in tracer selection. Finally, the test fuel is applied to an in-cylinder gasoline direct injection fuel mixture distribution measurement using PLIF. Differences between light, medium, and heavy fraction groups are studied under different strategies. Cycle-to-cycle variation analysis shows that the influence of absorption attenuation of the aromatic is distinct in a typical stratified strategy. In the area near the spark plug, cycle-to-cycle variation decreases as injection is delayed.
机译：对于缸内燃料混合物的分布测量，基于热引力分析和汽液平衡计算，开发了一种用于平面激光诱导荧光（PLIF）实验的多组分燃料设计方法。目标是制造具有与真实汽油相似的挥发性，并与示踪剂具有良好的共蒸发比（接近1.0）的燃料。分别选择丙酮，甲苯和三甲基苯作为轻，中和重馏分的示踪剂，并开发了五组分测试燃料。测试燃料用于研究组分和温度对共蒸发比的影响。示踪剂或燃料成分比例的任何变化都会影响所有共蒸发比，但5％以内的变化被认为是可以接受的。结果表明，丙酮对共蒸发比的影响最大。温度也是关键因素。示踪剂和馏分组中各组分的饱和蒸气压和活度系数会显着影响共蒸发优化，表明这些值是选择示踪剂时的主要考虑因素。最后，使用PLIF将测试燃料应用于缸内汽油直接喷射燃料混合物分布测量。在不同策略下研究轻，中和重馏分组之间的差异。周期变化分析表明，在典型的分层策略中，芳烃吸收衰减的影响是明显的。在火花塞附近的区域中，随着喷射延迟，循环间的差异会减小。

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  • 来源
    《Applied Energy》 |2011年第8期|p.2617-2627|共11页
  • 作者

    Xiao Ma; Xu He; Jian-xin Wang; Shijin Shuai;

  • 作者单位

    State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China;

    State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China;

    State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China;

    State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Multi-component fuel; Co-evaporation; PLIF; VLE; Thermal gravity;

    机译：多组分燃料;共蒸发;PLIF;VLE;热引力;

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