Biodiesel Spray Characteristics and Their Effect on Engine Combustion and Particulate Emissions

生物柴油 喷雾特性 柴油 燃烧 微粒 柴油机 材料科学 点火系统 燃油喷射 共轨 燃烧室 环境科学 制浆造纸工业 废物管理 喷嘴 化学 汽车工程 有机化学 工程类 热力学 物理 机械工程 喷嘴 催化作用
作者
Akhilendra Pratap Singh,Avinash Kumar Ágarwal
出处
期刊:Journal of Energy Resources Technology-transactions of The Asme [ASM International]
卷期号:142 (8) 被引量:19
标识
DOI:10.1115/1.4045923
摘要

Abstract Spray analysis is used to characterize the fuel spray evolution and spray shape, which affects in-cylinder combustion and particulate emission characteristics of compression ignition (CI) engines. In this study, spray evolution of biodiesel blends and mineral diesel was captured using a high-speed charge coupled device (CCD) camera at different fuel injection pressures (FIPs) and ambient pressures (APs) in a constant volume spray chamber (CVSC). Results showed that spray parameters were significantly affected by FIP and AP. Higher FIPs resulted in longer fuel spray penetration length (Ls) and reduced spray cone angle (As). However, AP variation showed an exactly opposite trend of Ls and As. Increasing AP resulted in shorter Ls and increased As. Fuel properties also affected the spray characteristics, which slightly improved for lower biodiesel blends (B20: 20% v/v blend of biodiesel with mineral diesel) and then degraded for higher biodiesel blends (B40: 40% v/v blend of biodiesel with mineral diesel) with respect to baseline mineral diesel. The effects of these findings of fuel spray analysis were validated using engine experiments, which were performed in a single-cylinder research engine using identical test fuels and fuel injection parameters. Relatively superior combustion of B20-fueled engine and lower particulate emissions at higher FIPs showed good agreement with spray results.
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