Using Ducted Fuel Injection to Attenuate Soot Formation in a Mixing-Controlled Compression Ignition Engine [electronic resource]

• Ngôn ngữ: eng
• Ký hiệu phân loại: 621.48 Nuclear engineering
• Thông tin xuất bản: Washington, D.C. : Oak Ridge, Tenn. : United States. Dept. of Energy. Office of Energy Efficiency and Renewable Energy ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2019
• Mô tả vật lý: Size: Article No. 03-12-03-0021 : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 266339
• Chủ đề: 1. 33 advanced propulsion systems; 2. 54 environmental sciences; 3. Diesel; 4. Ducted fuel injection; 5. Soot

Tóm tắt

 Ducted fuel injection (DFI) is a plan that can be used to enhance the fuel/charge-gas mixing within the combustion chamber of a direct-injection mixing-controlled compression-ignition engine. The concept involves injecting the fuel through a small tube within the combustion chamber to facilitate the creation of a leaner mixture in the autoignition zone, relative to a conventional free-spray configuration (i.e., a fuel spray that is not surrounded by a duct). Although previous experiments demonstrated that DFI lowers both soot incandescence and soot mass in a constant-volume combustion vessel with a single-component normal-alkane fuel (n-dodecane), this work provides the first evidence that the technology provides similar benefits in an engine application using a commercial diesel fuel containing ~30 wt% aromatics. The present study investigates the effects on engine-out emissions and efficiency with a two-orifice injector tip for charge-gas mixtures containing 16 and 21 mol% oxygen. The result is that DFI is shown to be effective at curtailing engine-out soot emissions. It also breaks the soot-NO<
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