Exploiting the potential of large eddy simulations (LES) for ducted fuel injection investigation in non-reacting conditions

Segatori, C.; Piano, A.; Peiretti Paradisi, B.; Bianco, A.; Millo, F.

doi:10.1016/j.ijmultiphaseflow.2023.104686

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2024

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Cited by 5 publications

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Evaluation of the ducted fuel injection concept for medium duty engines and multi-hole nozzles: An optical analysis

Pastor,

Micó,

Lewiski

et al. 2024

Applied Energy

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Evaluation of the ducted fuel injection concept for medium duty engines and multi-hole nozzles: An optical analysis

Pastor,

Micó,

Lewiski

et al. 2024

Applied Energy

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Analysis on spray behavior of ducted fuel injection under different ambient pressures

Li,

Zou,

Xie

2024

International Journal of Multiphase Flow

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Determining tolerance requirements for spray-duct alignment in ducted fuel injection

Şener,

Nyrenstedt,

Baumgard

et al. 2024

International Journal of Engine Research

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Several ducted fuel injection (DFI) studies have highlighted the importance of accuracy in aligning the duct axis with that of its corresponding spray for optimal effectiveness, as misalignment adversely impacts the method’s performance. The need for accurate alignment could lead to added manufacturing complexity via tighter tolerances. This study systematically explores cases of horizontal, vertical, and rotational misalignment, analyzing their respective effects on DFI performance. Vertical and horizontal misalignments at the duct inlet plane were varied at magnitudes of 6.25%, 12.5%, and 25.0% of the duct diameter, corresponding to 0.125, 0.25, and 0.5 mm, respectively. Rotational misalignments were set at 1°, 2°, and 4°, corresponding to 3.65%, 7.30%, and 14.6%, respectively, of the duct diameter at its inlet plane. The investigation yields spray-duct alignment tolerance limits and highlights the influence of misalignment direction on emissions due to the interactions with swirl and squish inside the combustion chamber. The results indicate that the tolerance limits for the alignment are within 4° and 0.5 mm relative to the geometrically aligned position. If the misalignment exceeds 4°of rotation or 0.5 mm in the horizontal direction, the beneficial effects on soot reduction using this method are no longer observed. The findings contribute to an understanding that can be used to optimize DFI for cleaner and more efficient combustion in compression-ignition engines.

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Exploiting the potential of large eddy simulations (LES) for ducted fuel injection investigation in non-reacting conditions

Cited by 5 publications

References 51 publications

Evaluation of the ducted fuel injection concept for medium duty engines and multi-hole nozzles: An optical analysis

Evaluation of the ducted fuel injection concept for medium duty engines and multi-hole nozzles: An optical analysis

Analysis on spray behavior of ducted fuel injection under different ambient pressures

Determining tolerance requirements for spray-duct alignment in ducted fuel injection

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