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首页> 外文期刊>Renewable energy >An experimental study on the combustion, performance and emission characteristics of a diesel engine fuelled with diesel-castor oil biodiesel blends
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An experimental study on the combustion, performance and emission characteristics of a diesel engine fuelled with diesel-castor oil biodiesel blends

机译：柴油-蓖麻油生物柴油混合物燃料柴油发动机的燃烧，性能和排放特性的实验研究

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An experimental work has been performed to compare the combustion, performance and emission characteristics of a compression ignition engine running with diesel and three different blends of diesel and biodiesel (castor oil methyl ester, COME). The biodiesel has been prepared by ailcaline trans-esterification using NaOH as catalyst. The properties of the fuels, like viscosity, surface tension, heating value, flash point and elemental composition, have been measured following standard test procedures. The variation of viscosity and surface tension of the pure fuels and their blends with temperature are experimentally determined. Experiments have also been performed on a porous sphere to compare the mass burning rate and transition velocity from envelope to wake flame for the pure fuels and their blends. The porous sphere experiment results indicate that diesel has higher evaporation rate than COME while the chemical reactivity of the latter is more than the former. The originality of the work is in using the fundamental information from the porous sphere experiments to explain the combustion characteristics in the engine cylinder. Studies in the engine reveal that combustion starts earlier with the diesel-biodiesel blends and the rate of pressure rise during the rapid combustibn phase is also faster with the blended fuels compared to that with diesel. However, not much difference has been noticed in the performance (brake thermal efficiency, brake specific fuel consumption and exhaust gas temperature) and emission (CO, HC and NO) characteristics of the engine using the diesel fuel and diesel-biodiesel fuel blends. (C) 2017 Elsevier Ltd. All rights reserved.
机译：已经进行了一项实验工作，以比较使用柴油以及三种不同的柴油和生物柴油（蓖麻油甲酯，COME）混合物运行的压燃式发动机的燃烧，性能和排放特性。该生物柴油是通过使用NaOH作为催化剂通过碱性酯交换反应制备的。燃料的特性，例如粘度，表面张力，热值，闪点和元素组成，已按照标准测试程序进行了测量。实验确定了纯燃料及其混合物的粘度和表面张力随温度的变化。还已经在多孔球体上进行了实验，以比较纯燃料及其混合物的质量燃烧速率和从包壳到尾焰的过渡速度。多孔球实验结果表明，柴油的蒸发速率比COME高，而后者的化学反应性比COME高。这项工作的独创性在于使用多孔球实验的基本信息来解释发动机气缸内的燃烧特性。发动机上的研究表明，柴油-生物柴油混合燃料的燃烧开始较早，与柴油相比，混合燃料的快速燃烧阶段的压力上升速度也更快。但是，在使用柴油燃料和柴油-生物柴油燃料混合物的发动机的性能（制动热效率，制动比燃料消耗和废气温度）和排放（CO，HC和NO）特性方面，没有发现太大差异。 （C）2017 Elsevier Ltd.保留所有权利。

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