LAPSE:2023.30750
Published Article
LAPSE:2023.30750
Experimental and CFD Investigation of Fuel Mixing in an Optical-Access Direct-Injection NG Engine and Correlation with Test Rig Combustion and Performance Data
Daniela Misul, Mirko Baratta, Jiajie Xu, Alois Fuerhapter, Rene Heindl
April 17, 2023
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.
Keywords
Alternative Fuels, Computational Fluid Dynamics, decarbonization, direct injection
Suggested Citation
Misul D, Baratta M, Xu J, Fuerhapter A, Heindl R. Experimental and CFD Investigation of Fuel Mixing in an Optical-Access Direct-Injection NG Engine and Correlation with Test Rig Combustion and Performance Data. (2023). LAPSE:2023.30750
Author Affiliations
Misul D: Energy Department, Politecnico di Torino, 10129 Torino, Italy [ORCID]
Baratta M: Energy Department, Politecnico di Torino, 10129 Torino, Italy
Xu J: Energy Department, Politecnico di Torino, 10129 Torino, Italy
Fuerhapter A: AVL List GmbH, 8020 Graz, Austria
Heindl R: AVL List GmbH, 8020 Graz, Austria
Journal Name
Energies
Volume
16
Issue
7
First Page
3004
Year
2023
Publication Date
2023-03-25
Published Version
ISSN
1996-1073
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Original Submission
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PII: en16073004, Publication Type: Journal Article
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doi:10.3390/en16073004
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Apr 17, 2023
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