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An engine parameters sensitivity analysis on ducted fuel injection in constant-volume vessel using numerical modeling Politecnico di Torino
- Format:
- Book
- Conference/Event
- Author/Creator:
- Millo, Federico, author.
- Conference Name:
- 15th International Conference on Engines & Vehicles (2021-09-12 : Capri, Italy)
- Language:
- English
- Physical Description:
- 1 online resource cm
- Place of Publication:
- Warrendale, PA SAE International 2021
- Summary:
- The use of Ducted Fuel Injection (DFI) for attenuating soot formation throughout mixing-controlled diesel combustion has been demonstrated impressively effective both experimentally and numerically. However, the last research studies have highlighted the need for a tailored engine calibration and of a duct geometry optimization for the full exploitation of the technology potential. Nevertheless, the research gap on the response of DFI combustion to the main engine operating parameters has to be still covered. Previous research analysis has been focused on a numerical soot-targeted duct geometry optimization in constant-volume vessel conditions. Starting from the optimized duct design, the herein study aims to analyze the influence of several engine operating parameters (id est rail pressure, air temperature, air density, oxygen concentration) on DFI combustion, having free spray results as a reference. Furthermore, the duct wall temperature influence is investigated in order to preliminary explore the needs in terms of duct thermal management. The impact of the above-mentioned parameters on combustion and emissions formation processes is assessed, highlighting the soot mitigation mechanisms enabled by DFI operation. The optimized duct design led to a strong soot reduction for most of the operating conditions tested, thus confirming the robustness of the proposed geometry. This preliminary understanding step via numerical simulation of DFI calibration requirements paves the way to future studies on duct-equipped engine applications
- Notes:
- Vendor supplied data
- Publisher Number:
- 2021-24-0015
- Access Restriction:
- Restricted for use by site license
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