期刊
APPLIED ENERGY
卷 204, 期 -, 页码 206-220出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.apenergy.2017.07.001
关键词
Soot; Duct; Diesel; Spray; Mixing; Combustion
资金
- U.S. Department of Energy Office of Energy Efficiency and Renewable Energy, Bioenergy Technologies and Vehicle Technologies Offices
- U.S. Department of Energy, Office of Science, Office of Workforce Development for Teachers and Scientists under the Science Undergraduate Laboratory Internships
- U.S. Department of Energy's National Nuclear Security Administration [DE-NA0003525]
Designers of direct-injection compression-ignition engines use a variety of strategies to improve the fuel/charge-gas mixture within the combustion chamber for increased efficiency and reduced pollutant emissions. Strategies include the use of high fuel-injection pressures, multiple injections, small injector orifices, flow swirl, long-ignition-delay conditions, and oxygenated fuels. This is the first journal publication on a new mixing-enhancement strategy for emissions reduction: ducted fuel injection. The concept involves injecting fuel along the axis of a small cylindrical duct within the combustion chamber, to enhance the mixture in the autoighition zone relative to a conventional free-spray configuration (i.e., a fuel spray that is not surrounded by a duct). The results described herein, from initial proof-of-concept experiments conducted in a constant-volume combustion vessel, show dramatically lower soot incandescence from ducted fuel injection than from free sprays over a range of charge-gas conditions that are representative of those in modern direct-injection compression-ignition engines. (C) 2017 Elsevier Ltd. All rights reserved.
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