Experimental Research on the Macroscopic and Microscopic Spray Characteristics of Diesel-PODE3-4 Blends
Experimental Research on the Macroscopic and Microscopic Spray Characteristics of Diesel-PODE3-4 Blends
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DOI：
10.3390/en14175559
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发表时间：
2021-09
期刊：
影响因子：
3.2
通讯作者：
Yuling Chen;Songtao Liu;Xiaoyu Guo;C. Jia;Xiaodong Huang;Yaodong Wang;Haozhong Huang
中科院分区：
文献类型：
--
作者：
Yuling Chen;Songtao Liu;Xiaoyu Guo;C. Jia;Xiaodong Huang;Yaodong Wang;Haozhong Huang
聚氧二甲基醚（PODE）是一种低粘度的含氧燃料，可以改善混合燃料的挥发性。本文研究了不同环境温度和喷射压力（IP）下柴油- pode3 -4的宏观和微观喷射特性。所研究的混合燃料包括纯柴油（P0）和两种按PODE3-4体积分数分别为20% （P20）和50% （P50）的柴油混合燃料。实验采用了米氏散射和纹影成像技术。结果表明：随着喷嘴的增大，三种燃料的汽相穿透距离和平均锥角增大，三种燃料的索特平均直径（SMD）减小；随着环境温度的升高，P20和P50的气相投影面积和平均气相锥角增大，SMD减小，而纯柴油的气相投影面积变化不显著。结果表明，掺PODE3-4的混合燃料在低温下的喷雾特性优于P0，三种燃料的SMD等级为P0 > P20 > P50。通过可视化实验，有助于进一步了解不同燃料特性的蒸发特性，开发合适的柴油替代燃料。
Polyoxymethylene dimethyl ether (PODE) is a low-viscosity oxygenated fuel that can improve the volatility of blended fuels. In this work, the macroscopic and microscopic spray characteristics of diesel-PODE3-4 under different ambient temperatures and injection pressures (IP) are studied. The studied blends consisted of pure diesel (P0), two diesel blend fuels of 20% (P20) and 50% (P50) by volume fraction of PODE3-4. The Mie scattering and Schlieren imaging techniques are used in the experiment. The results show that with the increase in IP, the vapor phase penetration distance and the average cone angle of the three fuels increased, and the Sauter mean diameter (SMD) of the three fuels decreased. When the ambient temperature increased, the vapor phase projection area and the average vapor phase cone angle of P20 and P50 increased, and the SMD decreased, but the vapor phase projection area of pure diesel did not change significantly. The results indicate that the blended fuel with PODE3-4 has better spray characteristics than P0 at low temperature, and the SMD hierarchy between the three fuels is P0 > P20 > P50. Through the visualization experiment, it is helpful to further understand the evaporation characteristics of different fuel properties and develop appropriate alternative diesel fuel.