On Turbulent Jet Ignition: a detailed numerical analysis and comparison with a standard ignition system
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- Format
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- Non-members (tax incl.)：￥6,600 Members (tax incl.)：￥5,280
- Paper/Info type
- SAE Paper
No.2021-24-0033
- Date of publication
- Sep 2021
- Publisher
- SAE International
- Language
- English
- Event
- International Conference on Engines and Vehicles 2021
Detailed Information
| Author(E) | 1) Elia Distaso, 2) Egidio Cassone, 3) Riccardo Amirante PhD, 4) Pietro De Palma, 5) Paolo Sementa, 6) Paolo Tamburrano PhD, 7) Bianca Maria Vaglieco |
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| Affiliation(E) | 1) Politecnico di Bari, 2) Politecnico di Bari, 3) Politecnico di Bari, 4) Politecnico di Bari, 5) Istituto Motori CNR, 6) Politecnico di Bari, 7) Istituto Motori CNR |
| Abstract(E) | Internal combustion engines (ICE) will most likely have a key role in the transition period toward greener propulsion systems. Therefore, increasing ICE efficiency and simultaneously reducing their emissions has become an imperative objective. Turbulent Jet Ignition appears one of the most promising technique able to achieve such a target, since it can effectively increase the potentiality of employing alternative fuels which are nonetheless hard to efficiently ignite in comparison to gasoline, such as methane. In this work, an innovative analysis approach is purposed and applied to study an in-house manufactured prototype of an active pre-chamber, installed on an optically accessible engine fueled with methane. 3D CFD simulations are employed to monitor and analyses the processes evolving in the pre-chamber over a whole engine cycle, focusing the attention on the scavenging, filling and combustion phases. Moreover, the jets characteristics and species distribution and evolution are analyzed in order to study the reactive-jet-induced ignition mechanism of the main charge and the associated fuel conversion mechanism. Attention is also paid to pollutant species formation, and in-cylinder distribution. The purposed approach allowed the characterization of the main phenomena involved in the operation of such system as well as the evaluation of different parameters, such as combustion duration, flame evolution and pre-chamber ignition energy release. A direct comparison with the data collected on the same engine equipped with a standard spark plug, highlighted a remarkable increase in combustion efficiency as well as pointed out a large room for improvement in reducing pollutant emissions. |
