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首页> 外文学位 >COMBUSTION CHARACTERISTICS OF NEAT ETHANOL AND BLENDS OF ETHANOL AND DIESEL FUEL NUMBER TWO IN A DIRECT-INJECTION DIESEL ENGINE.
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COMBUSTION CHARACTERISTICS OF NEAT ETHANOL AND BLENDS OF ETHANOL AND DIESEL FUEL NUMBER TWO IN A DIRECT-INJECTION DIESEL ENGINE.

机译：直喷式柴油机中两种乙醇的燃烧特性以及两种乙醇和柴油的掺混物。

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摘要

This work is an investigation of the combustion characteristics of neat ethanol and blends of ethanol and diesel fuel No. 2 (DF2) in a direct-injection, single-cyclinder, research-type diesel engine.; The theoretical part includes the analysis of the preignition processes and the formation of the combustible mixture. Both the physical factors and the chemical factors are discussed. Physical ignition delay is calculated using a transient model.; The experimental work was conducted on a direct-injection, single-cylinder, research-type diesel engine. The tests covered the whole range of ethanol-diesel blends; from 100% ethanol to 100 DF2. The test parameters were: the fuel type, the intake air properties, and the fuel-air ratio. The ignition delay was measured by detecting the beginning of injection and the occurrence of a detectable pressure rise. The cycle-to-cycle variations in ignition delay were determined from the superimposed pressure traces for 112 consecutive cycles. The effects of ethanol-diesel fuel blends on engine performance were investigated.; The present results show that, for ethanol-DF2 blends, the pressure-rise delay and its cycle-to-cycle variations decrease by increasing both the intake-air pressure and the intake-air temperature, and increase by increasing the ethanol content in the blend. Three important findings of this study are: (1) Developing ignition delay correlations for ethanol-DF2 blends. (2) Determining the global activation energy for ethanol-DF2 blends. (3) Determining the cetane numbers for ethanol-DF2 blends.; The present work shows that the ignition delay period becomes more chemically controlled as the ethanol content is increased in an ethanol-DF2 blend. Increasing the ethanol content reduces smoke emissions. On the other hand, the increase in the ethanol content causes a delay in the dynamic injection timing and an increase in materials wear.
机译：这项工作是在直喷单循环研究型柴油发动机中研究纯乙醇以及乙醇和2号柴油（DF2）的混合物的燃烧特性。理论部分包括对提前点火过程的分析和可燃混合物的形成。讨论了物理因素和化学因素。物理点火延迟是使用瞬态模型计算的。实验工作是在直喷单缸研究型柴油机上进行的。这些测试涵盖了乙醇-柴油混合物的整个范围。从100％乙醇到100 DF2。测试参数为：燃油类型，进气特性和燃油空气比。通过检测喷射开始和可检测到的压力升高来测量点火延迟。从112个连续循环的叠加压力曲线确定点火延迟的各个循环变化。研究了乙醇-柴油混合燃料对发动机性能的影响。目前的结果表明，对于乙醇-DF2共混物，压力上升延迟及其周期变化通过增加进气压力和进气温度而减小，并且通过增加乙醇中的乙醇含量而增加。混合。这项研究的三个重要发现是：（1）建立乙醇-DF2混合物的点火延迟相关性。 （2）确定乙醇-DF2共混物的整体活化能。 （3）确定乙醇-DF2共混物的十六烷值；本工作表明，随着乙醇-DF2共混物中乙醇含量的增加，点火延迟期变得更加化学控制。增加乙醇含量可减少烟雾排放。另一方面，乙醇含量的增加导致动态喷射正时的延迟和材料磨损的增加。

著录项

  • 作者

    SAEED, MOHAMED NOOR EL DIN.;

  • 作者单位

    Wayne State University.;

  • 授予单位 Wayne State University.;
  • 学科 Engineering Mechanical.
  • 学位 Ph.D.
  • 年度 1984
  • 页码 267 p.
  • 总页数 267
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 机械、仪表工业;
  • 关键词

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