Dynamic spray development of 2-methylfuran compared to ethanol and isooctane under ultra-high injection pressure
Dynamic spray development of 2-methylfuran compared to ethanol and isooctane under ultra-high injection pressure
复制标题
DOI：
10.1016/j.fuel.2018.06.013
复制
发表时间：
2018-12
期刊：
影响因子：
7.4
通讯作者：
Bo Wang;Yanfei Li;Yizhou Jiang;Hongming Xu;Xinyue Zhang
中科院分区：
文献类型：
--
作者：
Bo Wang;Yanfei Li;Yizhou Jiang;Hongming Xu;Xinyue Zhang
了解喷雾行为是高喷射压力系统和生物燃料（如2-甲基呋喃（MF）和乙醇（ETH））在现代直喷汽油发动机中成功应用的关键。在本工作中，MF喷雾特性在近场（最大1.6 mm）和远场（最大48 mm）的超高喷射压力为30，40和50 MPa下进行了实验研究相比，ETH和异辛烷（ISO）。分析了喷油压力和燃油特性对喷雾形态、锥角和贯穿距离的影响。结果表明，在30和40 MPa压力下，MF喷嘴具有独特的蘑菇形喷嘴结构，喷嘴表面附着气泡。这个蘑菇尖和气泡的形成密切相关，并受到韦伯数的强烈影响。在所测试的三种燃料中，MF由于其大的密度而在近场和远场呈现最低的喷雾尖端速度。与ETH相比，MF和ISO由于其较低的粘度而总是具有较宽的宏观锥角。
Understanding spray behaviors is key for the successful employment of high injection pressure systems and biofuels such as 2-methylfuran (MF) and ethanol (ETH) in modern direct-injection gasoline engines. In this present work, the MF spray characteristics in the near-field (up to 1.6 mm) and far-field (up to 48 mm) were experimentally investigated under ultra-high injection pressure of 30, 40 and 50 MPa compared to those of ETH and isooctane (ISO). The effects of injection pressure and fuel properties on the spray morphology, tip penetration and cone angle development have been analyzed. The results showed that MF had a unique spray tip structure with a bubble attached to a mushroom tip at 30 and 40 MPa. The formation of this mushroom tip and bubble was closely related and strongly influenced by the Weber number. Among the three fuels tested, MF presented the lowest spray tip velocity at both near-field and far-field due to its large density. Compared to ETH, MF and ISO always had wider macro cone angles due to their lower viscosity.