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Simulation Research on Ultra-Lean Constant-Volume Combustion Initiated by Spark-Ignited Micro-Fuel-Jet Tongji University
- Format:
- Book
- Conference/Event
- Author/Creator:
- Long, Quan, author.
- Conference Name:
- WCX SAE World Congress Experience (2022-04-05 : Detroit & Online, Michigan, United States)
- Language:
- English
- Physical Description:
- 1 online resource cm
- Place of Publication:
- Warrendale, PA SAE International 2022
- Summary:
- In the ultra-lean combustion mode, the combustion temperature is relatively low, which is expected to avoid the high-temperature NOx generation. And it also can use excess air to fully oxidize CO, HC and Soot, to achieve cleaner combustion. But at the same time, ultra-lean combustion has difficulties in ignition and flame propagation.This paper used CONVERGE to simulate the combustion process and products of a new ultra-lean combustion mode, which ignited the ultra-lean premixed fuel/air mixture with the spark-ignited micro-fuel-jet, in a constant-volume vessel with a 6-hole GDI injector. The differences of combustion processes and products were simulated for two spark-ignition positions, including on' the micro-jet spray and between' two micro-jet sprays. It was found that the combustion duration (the time for burned-fuel-ratio from 10% to 90%) could be shortened by about 14.3% if igniting on' the micro-jet spray, but the amount of NOx generated would increase about 21.0%. Meanwhile, compared with the homogeneous premixed combustion with traditional spark ignition at the same global fuel/air ratio, the new ultra-lean combustion mode with igniting on' the micro-jet spray had lower CO and NOx emissions, reduced by 49.5% and 23.3% respectively. In addition, the three ultra-lean ignition methods all have extremely low Soot products. The heat release of this new mode was more concentrated with combustion duration shortened by about 20.2%, which would be beneficial to achieve more efficient and cleaner combustion
- Notes:
- Vendor supplied data
- Publisher Number:
- 2022-01-0432
- Access Restriction:
- Restricted for use by site license
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