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High-Speed Imaging of Main-Chamber Combustion of a Narrow Throat Pre-Chamber under Lean Conditions King Abdullah University of Science and Technology
- Format:
- Book
- Conference/Event
- Author/Creator:
- Echeverri Marquez, Manuel, author.
- Conference Name:
- SAE Powertrains, Fuels & Lubricants Meeting (2020-09-22 : Krakow, Poland)
- Language:
- English
- Physical Description:
- 1 online resource cm
- Place of Publication:
- Warrendale, PA SAE International 2020
- Summary:
- Pre-chamber combustion (PCC) allows an extension on the lean limit of an internal combustion engine (ICE). This combustion mode provides lower NOx emissions and shorter combustion durations that lead to a higher indicated efficiency. In the present work, a narrow throat pre-chamber was tested, which has a unique nozzle area distribution in two rows of six nozzle holes each. Tests were carried out in a modified heavy-duty engine for optical visualization. Methane was used as fuel for both the pre-chamber and the main chamber. Seven operating points were tested, including passive pre-chamber mode as a limit condition, to study the effect of pre- and main-chamber fuel addition on the pre-chamber jets and the main chamber combustion via chemiluminescence imaging. A typical cycle of one of the tested conditions is explained through the captured images. Observations of the typical cycle reveal a predominant presence of only six jets (from the lower row), with well-defined jet structures. A secondary flame front is generated in the center of the combustion chamber due to the delayed contribution of the upper row of nozzle holes. Passive mode exhibited a random and sequential jet emergence, which can be related to the observed slower burn rate. The increase in the quantity of fuel added to the main-chamber showed a strong effect on the flame's overall intensity and jet penetration. On the other hand, increasing the pre-chamber fuel injection exhibits different jet shapes
- Notes:
- Vendor supplied data
- Publisher Number:
- 2020-01-2081
- Access Restriction:
- Restricted for use by site license
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