Influence of Ambient Pressure on the Jet-Ignition Combustion Performance and Flame Propagation Characteristics of Gasoline in a Constant Volume Combustion Chamber

Zongjie Hu, Minglong Li, Xinke Miao, Zhiyu Wang, Yuanzhi Tang, Xijiang Wu, Wangchao Yu, Zhe Kang and Jun Deng ()
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Zongjie Hu: School of Automotive Studies, Tongji University, Shanghai 201804, China
Minglong Li: School of Automotive Studies, Tongji University, Shanghai 201804, China
Xinke Miao: School of Automotive Studies, Tongji University, Shanghai 201804, China
Zhiyu Wang: SAIC Motor Corporation Limited, Shanghai 201804, China
Yuanzhi Tang: School of Automotive Studies, Tongji University, Shanghai 201804, China
Xijiang Wu: SAIC Motor Corporation Limited, Shanghai 201804, China
Wangchao Yu: School of Automotive Studies, Tongji University, Shanghai 201804, China
Zhe Kang: College of Mechanical and Vehicle Engineering, Chongqing University, Chongqing 400044, China
Jun Deng: School of Automotive Studies, Tongji University, Shanghai 201804, China

Energies, 2024, vol. 17, issue 13, 1-17

Abstract: Based on a constant volume combustion chamber, the initial ambient pressure effect on gasoline combustion performance and flame propagation of the active and passive pre-chamber ignition systems were studied. Compared with the passive pre-chamber, the active pre-chamber can significantly expand the lean combustion limit from 1.2 to 1.5, enhance the ignition and combustion performance, and speed up the combustion of the main combustion chamber. At slightly lean combustion conditions, the heat release performance has a positive correlation with the initial ambient pressure. As the premixed λ increases, the heat release performance and the initial ambient pressure begin to become negatively correlated. Ignition delay can be decreased by approximately 50% at an initial pressure of 0.75 MPa, premixed lambda of 1.2 with APC compared with PPC. The high ambient pressure (1.0 MPa) in the constant volume chamber greatly reduces the mixture entrainment ability of the jet flame at lean combustion conditions, thereby reducing the combustion speed and peak heat release rate.

Keywords: pre-chamber; jet ignition; constant volume combustion chamber; ambient pressure; flame visualization (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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