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Numerical prediction of the performance, combustion and emission characteristics of a Cl engine using different biodiesels

机译：使用不同生物柴油的Cl发动机性能，燃烧和排放特性的数值预测

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An attempt has been made to investigate numerically the energetic, combustion and environmental performances of a single-cylinder naturally aspirated direct injection diesel engine using the commercial software, Diesel-RK. Diesel and five different biodiesels, namely jatropha biodiesel, soybean biodiesel, palm stearin biodiesel, karanja biodiesel and rapeseed biodiesel, are used separately as fuels in this study. Experiments have also been conducted with diesel and palm stearin biodiesel to validate the predicted results. The experimental and the numerical results match both qualitatively and quantitatively with slight deviations. The analysis of the numerical results shows that the engine performance deteriorates with the use of different biodiesels as fuels. Brake thermal efficiency decreases by 3% (maximum) in case of palm stearin biodiesel. On the other hand, brake specific fuel consumption and brake specific energy consumption increase and the maximum values are found to be 25.8 and 3.6%, respectively. Among the biodiesels, jatropha biodiesel showed the best performance and palm stearin biodiesel showed the worst. When the combustion characteristics were compared, it was noted that both the ignition delay period and the heat release rate decrease to some extent for different biodiesels compared to diesel. The use of biodiesel gives a cleaner exhaust compared to that of diesel, and jatropha biodiesel gives the cleanest exhaust in terms of particulate matter and smoke emissions. However, the formation of nitrogen oxides increases with the use of biodiesels and the maximum increase was noted with rapeseed biodiesel.
机译：已经尝试使用商业软件Diesel-RK来从数字上研究单缸自然吸气直喷柴油发动机的能量，燃烧和环境性能。柴油和五种不同的生物柴油，分别是麻疯树生物柴油，大豆生物柴油，棕榈硬脂精生物柴油，karanja生物柴油和油菜籽生物柴油，分别用作燃料。还对柴油和棕榈硬脂生物柴油进行了实验，以验证预测结果。实验和数值结果在定性和定量上都相吻合，但有少许偏差。数值结果的分析表明，使用不同的生物柴油作为燃料会使发动机性能下降。对于棕榈硬脂生物柴油，制动热效率降低3％（最大）。另一方面，制动器比燃料消耗量和制动器比能量消耗增加，并且最大值分别为25.8％和3.6％。在生物柴油中，麻风树生物柴油表现最佳，而棕榈硬脂精生物柴油表现最差。当比较燃烧特性时，注意到与柴油相比，不同生物柴油的点火延迟时间和放热率都有一定程度的降低。与柴油相比，使用生物柴油可提供更清洁的废气，而麻风树生物柴油在颗粒物和烟雾排放方面可提供最清洁的废气。然而，氮氧化物的形成随着生物柴油的使用而增加，而菜籽生物柴油的增加最大。

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