Experimental and numerical investigations on spray characteristics of fatty acid methyl esters

The comparative experimental and numerical study is conducted to establish the significance of the use of single component over the multi-component representative of the biodiesel, diesel and their blend for predicting the spray tip penetration. The single component representatives of biodiesel, methyl oleate and methyl laurate and for the diesel are n-heptane, n-dodecane and n-tetradecane are studied. The methyl laurate is found to represent biodiesel of coconut, whereas methyl oleate is found to represent biodiesel having high percentage of long-chain fatty acid esters. The spray tip penetration of methyl oleate is found to be in good agreement with the measured spray tip penetration of karanja biodiesel. The spray tip penetration prediction of n-heptane fuel is closely following diesel spray tip penetration along with that of n-tetradecane and n-dodecane. The study suggests that the knowledge of the single component representative of biodiesel, diesel and their blend is sufficient t...本研究通过对比实验与数值模拟，旨在明确在预测喷雾顶端贯穿距（spray tip penetration）时，采用单组分替代物相较于多组分替代物在生物柴油、柴油及其混合燃料中的应用价值。本研究选取的单组分替代物如下：生物柴油的替代物为油酸甲酯（methyl oleate）与月桂酸甲酯（methyl laurate），柴油的替代物则为正庚烷（n-heptane）、正十二烷（n-dodecane）与正十四烷（n-tetradecane）。研究表明，月桂酸甲酯可用于替代椰子基生物柴油，而油酸甲酯则适用于替代长链脂肪酸酯占比较高的生物柴油。油酸甲酯的喷雾顶端贯穿距与水黄皮（karanja）生物柴油的实测喷雾顶端贯穿距吻合度良好。正庚烷燃料的喷雾顶端贯穿距预测结果与柴油、正十四烷及正十二烷的预测结果高度贴合。本研究表明，针对生物柴油、柴油及其混合燃料，采用其单组分替代物开展相关研究已足够[原文未完整收尾]。