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Volume 15
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Article

Numerical Investigation on the Performance of a 4-Stroke Engine with Different Passive Pre-Chamber Geometries Using a Detailed Chemistry Solver

by
Simone Bigalli
1,
Iacopo Catalani
1,
Francesco Balduzzi
1,*,
Nicola Matteazzi
2,
Lorenzo Agostinelli
2,
Michele De Luca
2 and
Giovanni Ferrara
1
1
Department of Industrial Engineering (DIEF), Università degli Studi di Firenze, Via di Santa Marta 3, 50139 Firenze, Italy
2
HPE-COXA, Via R. Dalla Costa 620, 41122 Modena, Italy
*
Author to whom correspondence should be addressed.
Energies 2022, 15(14), 4968; https://doi.org/10.3390/en15144968
Submission received: 8 June 2022 / Revised: 3 July 2022 / Accepted: 5 July 2022 / Published: 7 July 2022
(This article belongs to the Special Issue Numerical Simulation for Next Generation Engines)
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Abstract

Pre-chamber turbulent jet ignition represents one of the most promising techniques to improve spark ignition engines efficiency and reduce pollutant emissions. This technique consists of igniting the air-fuel mixture in the main combustion chamber by means of several hot turbulent flame jets exiting a pre-chamber. In the present study, the combustion process of a 4-stroke, gasoline SI, PFI engine equipped with a passive pre-chamber has been investigated through three-dimensional CFD (Computational Fluid Dynamics) analysis. A detailed chemistry solver with a reduced reaction mechanism was employed to investigate ignition and flame propagation phenomena. Firstly, the combustion model was validated against experimental data for the baseline engine configuration (i.e., without pre-chamber). Eventually, the validated numerical model allowed for predictive simulations of the pre-chamber-equipped engine. By varying the shape of the pre-chamber body and the size of pre-chamber orifices, different pre-chamber configurations were studied. The influence of the geometrical features on the duration of the combustion process and the pressure trends inside both the pre-chamber and main chamber was assessed and discussed. Since the use of a pre-chamber can extend the air-fuel mixture ignition limits, an additional sensitivity on the air-fuel ratio was carried out, in order to investigate engine performance at lean conditions.
Keywords: CFD; CONVERGE; numerical simulation; combustion; ICE; gasoline; 4-stroke; TJI; pre-chamber CFD; CONVERGE; numerical simulation; combustion; ICE; gasoline; 4-stroke; TJI; pre-chamber
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MDPI and ACS Style

Bigalli, S.; Catalani, I.; Balduzzi, F.; Matteazzi, N.; Agostinelli, L.; De Luca, M.; Ferrara, G. Numerical Investigation on the Performance of a 4-Stroke Engine with Different Passive Pre-Chamber Geometries Using a Detailed Chemistry Solver. Energies 2022, 15, 4968. https://doi.org/10.3390/en15144968

AMA Style

Bigalli S, Catalani I, Balduzzi F, Matteazzi N, Agostinelli L, De Luca M, Ferrara G. Numerical Investigation on the Performance of a 4-Stroke Engine with Different Passive Pre-Chamber Geometries Using a Detailed Chemistry Solver. Energies. 2022; 15(14):4968. https://doi.org/10.3390/en15144968

Chicago/Turabian Style

Bigalli, Simone, Iacopo Catalani, Francesco Balduzzi, Nicola Matteazzi, Lorenzo Agostinelli, Michele De Luca, and Giovanni Ferrara. 2022. "Numerical Investigation on the Performance of a 4-Stroke Engine with Different Passive Pre-Chamber Geometries Using a Detailed Chemistry Solver" Energies 15, no. 14: 4968. https://doi.org/10.3390/en15144968

APA Style

Bigalli, S., Catalani, I., Balduzzi, F., Matteazzi, N., Agostinelli, L., De Luca, M., & Ferrara, G. (2022). Numerical Investigation on the Performance of a 4-Stroke Engine with Different Passive Pre-Chamber Geometries Using a Detailed Chemistry Solver. Energies, 15(14), 4968. https://doi.org/10.3390/en15144968

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