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首页> 外文会议>Proceedings of the 2009 spring technical conference of the ASME Internal Combustion Engine Division >EFFECT OF THE SPRAY-ATOMIZATION CHARACTERISTICS ON THE NANO SIZE PARTICLE EXHAUST EMISSIONS CHARACTERISTICS USING BIODIESEL- BIOETHANOL BLENDED FUELS IN A Dl DIESEL ENGINE WITH COMMON RAIL INJECTION SYSTEM
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EFFECT OF THE SPRAY-ATOMIZATION CHARACTERISTICS ON THE NANO SIZE PARTICLE EXHAUST EMISSIONS CHARACTERISTICS USING BIODIESEL- BIOETHANOL BLENDED FUELS IN A Dl DIESEL ENGINE WITH COMMON RAIL INJECTION SYSTEM

机译：柴油机与生物柴油-生物乙醇混合燃料中喷雾雾化特性对纳米尺寸颗粒排放特征的影响

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The purpose of this work is to investigate the spray-atomization, combustion and emissions characteristics of biodiesel-bioethanol (BE) and biodiesel-diesel (BD) blended fuels compared with an undiluted biodiesel fuel. For studying the overall spray characteristics, the spray tip penetration, spray cone angle were analyzed from the spray images, and droplet size and distribution were analyzed from the droplet measuring system. In addition, the combustion and exhaust emissions characteristics including the nano-size particle number and size distribution of paniculate matter were studied using the direct injection diesel engine with a single cylinder.rnIn this investigation, it revealed that BE and BD blended fuels have slightly higher spray tip penetration and wider spray cone angle due to the reduction of fuel properties such as fuel density and kinematic viscosity. Fuel droplet sizes of blended fuels were distributed in the region of the lower diameter size, compared to biodiesel fuel. It can be said that the reduced fuel viscosity and surface tension of blended fuels affect the atomization performance of biodiesel fuel. The experimental results of spray characteristics were compared with the predicted results through the numerical method by the KIVA-3V. On the other hand, BD blended fuel has a similar combustion and emission characteristics compared with an undiluted biodiesel fuel. In case of BE blended fuel, the ignition delay becomes longer and the rate of heat release becomes high. In the case of exhaust emission characteristics of BE blended fuel, it has lower soot emission, contrary to the almost same nitrogen oxides, hydrocarbon, and carbonrnmonoxide. In the analysis of particle size and number distribution, the number and size distribution of B100 and BD20 fuels have a similar pattern and value. However, BE blended fuel has a lowest particle number in the region of nuclei mode. Moreover, the increase of the injection pressure affects the increase of the smaller size particle of BE blended fuel.
机译：这项工作的目的是研究与未稀释的生物柴油燃料相比，生物柴油-生物乙醇（BE）和生物柴油-柴油（BD）混合燃料的喷雾雾化，燃烧和排放特性。为了研究总体喷雾特性，从喷雾图像中分析了喷嘴的穿透力，喷雾锥角，并从液滴测量系统分析了液滴的大小和分布。此外，使用单缸直喷柴油机研究了燃烧和废气排放特性，包括纳米级颗粒数和颗粒状物质的尺寸分布.rn在这项研究中，发现BE和BD混合燃料略高由于降低了燃料特性（例如燃料密度和运动粘度），喷嘴的针尖穿透力和喷雾锥角变宽。与生物柴油燃料相比，混合燃料的燃料液滴尺寸分布在直径较小的区域。可以说，混合燃料的燃料粘度和表面张力降低会影响生物柴油燃料的雾化性能。通过KIVA-3V的数值方法将喷雾特性的实验结果与预测结果进行了比较。另一方面，与未稀释的生物柴油燃料相比，BD混合燃料具有相似的燃烧和排放特性。如果是BE混合燃料，点火延迟会变长，放热率会变高。就BE混合燃料的废气排放特性而言，其烟灰排放较低，这与几乎相同的氮氧化物，碳氢化合物和一氧化碳相反。在粒度和数量分布的分析中，B100和BD20燃料的数量和尺寸分布具有相似的模式和值。但是，BE混合燃料在核模态区域具有最低的颗粒数。而且，喷射压力的增加影响BE混合燃料的较小尺寸颗粒的增加。

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