Experimental and CFD Investigation of Fuel Mixing in an Optical-Access Direct-Injection NG Engine and Correlation with Test Rig Combustion and Performance Data
The present paper is the result of a cooperation between Politecnico di Torino and AVL List Gmbh within a recent collaborative research project funded by the EC. The research work was focused on the experimental and numerical characterization of mixture formation, combustion, and emissions in direct...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-03-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/16/7/3004 |
| _version_ | 1797608037893013504 |
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| author | Daniela Misul Mirko Baratta Jiajie Xu Alois Fuerhapter Rene Heindl |
| author_facet | Daniela Misul Mirko Baratta Jiajie Xu Alois Fuerhapter Rene Heindl |
| author_sort | Daniela Misul |
| collection | DOAJ |
| description | The present paper is the result of a cooperation between Politecnico di Torino and AVL List Gmbh within a recent collaborative research project funded by the EC. The research work was focused on the experimental and numerical characterization of mixture formation, combustion, and emissions in direct-injection NG engines, to draw useful indication for the design of innovative, high-performance engine concepts. As a matter of fact, direct-injection IC engines running on NG are believed to be a competitive transition solution towards a sustainable mobility scenario, given their maturity, technological readiness, and flexibility with respect to the fuel quality. Moreover, gaseous-fuel engines can further decrease their carbon footprint if blending of natural gas with hydrogen is considered. Provided that mixture formation represents a key aspect for the design of direct-injection engines, the activity presented in this paper is focused on the characterization of NG injection and on the mixing process, as well as the impact these latter hold on the combustion process as well as on engine-out emissions. The mixture formation process was analyzed by means of combined CFD and optical investigations. Furthermore, a full version of the engine was tested on a dynamic test rig, providing quantitative information on the engine performance and emission characteristics. The CFD results highlighted the correlation between the mixture homogeneity and the combustion stability and hinted at a relevant impact of the jet characteristics on the air charge tumble and turbulence characteristics. |
| first_indexed | 2024-03-11T05:38:58Z |
| format | Article |
| id | doaj.art-8fb502a0d6a744618723824db80a9138 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-11T05:38:58Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-8fb502a0d6a744618723824db80a91382023-11-17T16:36:06ZengMDPI AGEnergies1996-10732023-03-01167300410.3390/en16073004Experimental and CFD Investigation of Fuel Mixing in an Optical-Access Direct-Injection NG Engine and Correlation with Test Rig Combustion and Performance DataDaniela Misul0Mirko Baratta1Jiajie Xu2Alois Fuerhapter3Rene Heindl4Energy Department, Politecnico di Torino, 10129 Torino, ItalyEnergy Department, Politecnico di Torino, 10129 Torino, ItalyEnergy Department, Politecnico di Torino, 10129 Torino, ItalyAVL List GmbH, 8020 Graz, AustriaAVL List GmbH, 8020 Graz, AustriaThe present paper is the result of a cooperation between Politecnico di Torino and AVL List Gmbh within a recent collaborative research project funded by the EC. The research work was focused on the experimental and numerical characterization of mixture formation, combustion, and emissions in direct-injection NG engines, to draw useful indication for the design of innovative, high-performance engine concepts. As a matter of fact, direct-injection IC engines running on NG are believed to be a competitive transition solution towards a sustainable mobility scenario, given their maturity, technological readiness, and flexibility with respect to the fuel quality. Moreover, gaseous-fuel engines can further decrease their carbon footprint if blending of natural gas with hydrogen is considered. Provided that mixture formation represents a key aspect for the design of direct-injection engines, the activity presented in this paper is focused on the characterization of NG injection and on the mixing process, as well as the impact these latter hold on the combustion process as well as on engine-out emissions. The mixture formation process was analyzed by means of combined CFD and optical investigations. Furthermore, a full version of the engine was tested on a dynamic test rig, providing quantitative information on the engine performance and emission characteristics. The CFD results highlighted the correlation between the mixture homogeneity and the combustion stability and hinted at a relevant impact of the jet characteristics on the air charge tumble and turbulence characteristics.https://www.mdpi.com/1996-1073/16/7/3004computational fluid dynamicsalternative fuelsdirect injectiondecarbonization |
| spellingShingle | Daniela Misul Mirko Baratta Jiajie Xu Alois Fuerhapter Rene Heindl Experimental and CFD Investigation of Fuel Mixing in an Optical-Access Direct-Injection NG Engine and Correlation with Test Rig Combustion and Performance Data Energies computational fluid dynamics alternative fuels direct injection decarbonization |
| title | Experimental and CFD Investigation of Fuel Mixing in an Optical-Access Direct-Injection NG Engine and Correlation with Test Rig Combustion and Performance Data |
| title_full | Experimental and CFD Investigation of Fuel Mixing in an Optical-Access Direct-Injection NG Engine and Correlation with Test Rig Combustion and Performance Data |
| title_fullStr | Experimental and CFD Investigation of Fuel Mixing in an Optical-Access Direct-Injection NG Engine and Correlation with Test Rig Combustion and Performance Data |
| title_full_unstemmed | Experimental and CFD Investigation of Fuel Mixing in an Optical-Access Direct-Injection NG Engine and Correlation with Test Rig Combustion and Performance Data |
| title_short | Experimental and CFD Investigation of Fuel Mixing in an Optical-Access Direct-Injection NG Engine and Correlation with Test Rig Combustion and Performance Data |
| title_sort | experimental and cfd investigation of fuel mixing in an optical access direct injection ng engine and correlation with test rig combustion and performance data |
| topic | computational fluid dynamics alternative fuels direct injection decarbonization |
| url | https://www.mdpi.com/1996-1073/16/7/3004 |
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