机械与车辆学院1月13日乐动平台之二

超高压下微孔喷嘴喷射柴油的喷雾混合气形成与燃烧特性

Mixture Formation and Combustion Characteristics of Diesel Spray Injected by Micro-Hole Nozzle under Ultra-High Injection

——“新能源车辆及运用”学科创新引智基地系列报告

　　报告人：西田惠哉（Keiya Nishida）教授

　　报告人简历：广岛大学机械工程系，已发表期刊论文138篇，国际/国内会议论文114篇，出版书籍3册，获得多项重要国际学术奖励；是美国汽车工程学会委员以及日本可视化学会委员。主要从事柴油、汽油喷雾混合气形成和燃烧特性，喷雾与燃烧诊断，液体破碎与雾化，双流体雾化及其燃烧应用等领域的研究，并取得了丰富的研究成果。

报告摘要：

　　Currently，most experimental studies on the flue-air mixture preparation and combusition processes in direct injection(D.I.) Diesel engines are carried out using the conventional nozzle hole diameters(d>0.10mm) and normal injection pressures (P<200MPa).To provide fundamental experimental data for engine design and modeling,in this work,a micro-hole nozzle (d=0.08mm) and an ultra-high injection pressure(P=300MPa) were employed to investigate the effect of mixture preparation on auto-ignition,flame spreading,and soot formation in Diesel flames.Both the free and flat-wall-impinging sprays were investigated.The laser absorption-Scattering(LAS) technique was adopted to acquire quantitative information about evaporating Diesel sprays.The development of both the liquid and vapor phases fuel was recorded.An axisynnetric image processing method was used to acquire the data on the gas entrainment,fuel vaporization,and equivalence ratio distributions.The test ambient conditions in a quiescent constant-volume vessel were the same as those at the start of injection in the prototype engine.A high-speed video camera system was employed to record non-evaporating sprays,auto-ignition,and combustion processes.The dierct photography of OH chemiluminescence was used to provide information about the structure of the high temperature combustion process.The two-color method was used to measure the flame temperature and soot concentration distributions.The data on entranment and vaporization acquired in the evaporating sprays were correlated to auto-ignition,flame spreading,flame lift-off,and soot formation.

时间：2014年1月13日（星期一） 上午10：00
地点：仿真实验楼314会议室
语言：英文