Effect of structural parameters of active pre-chamber on ammonia/hydrogen premixed combustion process: A numerical investigation
The development of zero-carbon fuels is of great significance for reducing carbon emissions. Using an ammonia/hydrogen mixture as fuel, the combustion in engine through an active pre-chamber has a good effect on reducing carbon emissions. Moreover, the utilization of active pre-chamber is able to ac...
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Elsevier
2025-01-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X24017180 |
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| author | Zhe Kang Da Peng Jing Luo Yang Lv Lan Li |
| author_facet | Zhe Kang Da Peng Jing Luo Yang Lv Lan Li |
| author_sort | Zhe Kang |
| collection | DOAJ |
| description | The development of zero-carbon fuels is of great significance for reducing carbon emissions. Using an ammonia/hydrogen mixture as fuel, the combustion in engine through an active pre-chamber has a good effect on reducing carbon emissions. Moreover, the utilization of active pre-chamber is able to achieve rapid combustion speed, therefore leading to higher overall thermal efficiency. In order to realize an optimized combustion process, it is essential to investigate effects of the structural parameters of active pre-chamber on combustion process. Therefore, in this paper, an active pre-chamber combustion model was established based on a mass-produced gasoline engine, the mixture of ammonia and hydrogen was used as fuel, 8 different pre-chamber structure schemes were proposed, variations such as the angle and number of nozzle holes and the volume ratio of the pre-chamber to engine clearance volume were considered to investigate their influences. The results indicate that scheme 8, with a 60° nozzle angle, 6 holes, 1.6 mm aperture and 3.6 % volume ratio, is the optimal pre-chamber structure proposed in this study. Under this scheme, numerical calculations show an optimum thermal efficiency of 47.93 %. This study also revealed the interaction mechanism between structural parameters of active pre-chamber and the combustion process of ammonia/hydrogen mixture, which is significantly important for optimizing combustion processes and engine performance, and provides research references for the industrial utilization of ammonia-hydrogen combustion engines in passenger vehicles. |
| format | Article |
| id | doaj-art-4dc867616890416d9aafb6e7057f705c |
| institution | Kabale University |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-4dc867616890416d9aafb6e7057f705c2025-01-08T04:52:54ZengElsevierCase Studies in Thermal Engineering2214-157X2025-01-0165105687Effect of structural parameters of active pre-chamber on ammonia/hydrogen premixed combustion process: A numerical investigationZhe Kang0Da Peng1Jing Luo2Yang Lv3Lan Li4State Key Laboratory of Mechanical Transmission for Advanced Equipment, Chongqing University, Chongqing, 400044, China; College of Mechanical and Vehicle Engineering, Chongqing University, Chongqing, 400044, China; Corresponding author. State Key Laboratory of Mechanical Transmission for Advanced Equipment, Chongqing University, Chongqing, 400044, China.State Key Laboratory of Mechanical Transmission for Advanced Equipment, Chongqing University, Chongqing, 400044, China; College of Mechanical and Vehicle Engineering, Chongqing University, Chongqing, 400044, ChinaState Key Laboratory of Mechanical Transmission for Advanced Equipment, Chongqing University, Chongqing, 400044, China; College of Mechanical and Vehicle Engineering, Chongqing University, Chongqing, 400044, ChinaState Key Laboratory of Mechanical Transmission for Advanced Equipment, Chongqing University, Chongqing, 400044, China; College of Mechanical and Vehicle Engineering, Chongqing University, Chongqing, 400044, ChinaChina Merchants Testing Vehicle Technology Research Institute Co., Chongqing, 404100, ChinaThe development of zero-carbon fuels is of great significance for reducing carbon emissions. Using an ammonia/hydrogen mixture as fuel, the combustion in engine through an active pre-chamber has a good effect on reducing carbon emissions. Moreover, the utilization of active pre-chamber is able to achieve rapid combustion speed, therefore leading to higher overall thermal efficiency. In order to realize an optimized combustion process, it is essential to investigate effects of the structural parameters of active pre-chamber on combustion process. Therefore, in this paper, an active pre-chamber combustion model was established based on a mass-produced gasoline engine, the mixture of ammonia and hydrogen was used as fuel, 8 different pre-chamber structure schemes were proposed, variations such as the angle and number of nozzle holes and the volume ratio of the pre-chamber to engine clearance volume were considered to investigate their influences. The results indicate that scheme 8, with a 60° nozzle angle, 6 holes, 1.6 mm aperture and 3.6 % volume ratio, is the optimal pre-chamber structure proposed in this study. Under this scheme, numerical calculations show an optimum thermal efficiency of 47.93 %. This study also revealed the interaction mechanism between structural parameters of active pre-chamber and the combustion process of ammonia/hydrogen mixture, which is significantly important for optimizing combustion processes and engine performance, and provides research references for the industrial utilization of ammonia-hydrogen combustion engines in passenger vehicles.http://www.sciencedirect.com/science/article/pii/S2214157X24017180Ammonia-hydrogen combustion engineActive pre-chamberStructural parametersPassenger vehicle |
| spellingShingle | Zhe Kang Da Peng Jing Luo Yang Lv Lan Li Effect of structural parameters of active pre-chamber on ammonia/hydrogen premixed combustion process: A numerical investigation Case Studies in Thermal Engineering Ammonia-hydrogen combustion engine Active pre-chamber Structural parameters Passenger vehicle |
| title | Effect of structural parameters of active pre-chamber on ammonia/hydrogen premixed combustion process: A numerical investigation |
| title_full | Effect of structural parameters of active pre-chamber on ammonia/hydrogen premixed combustion process: A numerical investigation |
| title_fullStr | Effect of structural parameters of active pre-chamber on ammonia/hydrogen premixed combustion process: A numerical investigation |
| title_full_unstemmed | Effect of structural parameters of active pre-chamber on ammonia/hydrogen premixed combustion process: A numerical investigation |
| title_short | Effect of structural parameters of active pre-chamber on ammonia/hydrogen premixed combustion process: A numerical investigation |
| title_sort | effect of structural parameters of active pre chamber on ammonia hydrogen premixed combustion process a numerical investigation |
| topic | Ammonia-hydrogen combustion engine Active pre-chamber Structural parameters Passenger vehicle |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X24017180 |
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