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Title: | Analysis of Combustion Cycle-to-Cycle Variation in an Optical Single Cylinder Dual-Fuel Engine |
Authors: | Lauterkorn, AM Wang, X Zhao, H |
Issue Date: | 11-Apr-2023 |
Publisher: | SAE International |
Citation: | Lauterkorn, A.M., Wang, X. and Zhao, H. (2023) ‘Analysis of Combustion Cycle-to-Cycle Variation in an Optical Single Cylinder Dual-Fuel Engine’, SAE Technical Papers, 2023-01-0279, pp. 1 - 10. doi: 10.4271/2023-01-0279. |
Abstract: | This study aims to improve the dual fuel combustion for low/zero carbon fuels. Seven cases were tested in a single cylinder optical engine and their ignition and combustion characteristics are compared. The baseline case is the conventional diesel combustion. Four cases are diesel-gas (compressed natural gas) dual-fuel combustion operations, and two cases are diesel-hythane combustion. The diesel fuel injection process was visualized by a high-speed copper vapour laser. The combustion processes were recorded with a high-speed camera at 10000 Hz with an engine speed of 1200 rpm. The high-speed recordings for each case included 22 engine cycles and were postprocessed to create one spatial overlapped average combustion image. The average combustion cycle images were then further thresholded and these images were then used in a new method to analyze the cycle-to-cycle variation in a dimensionless, for all cases comparable value. Furthermore, the ignition delay and heat release profile of each case are analyzed. The results showed the lowest deviation from the complete overlap for the pure Diesel case and the Hythane Cases since the flames are more concentrated in these. From these studies, it can be concluded that the cyclic variation for the pure diesel combustion is mostly caused by the different swirl speeds in the piston bowl. The diesel-gas dual-fuel combustion with earlier pilot injections have lower cyclic variation due to a wider spread of the combustible mixture. The usage of hythane as main fuel instead of methane results in a about 10% faster combustion and more concentrated flames areas. |
Description: | Conference paper presented at WCX SAE World Congress Experience, 18-20 April, 2023, Detroit, MI, USA. Data availability: see: https://saemobilus.sae.org/papers/analysis-combustion-cycle-cycle-variation-optical-single-cylinder-dual-fuel-engine-2023-01-0279#data-sets . |
URI: | https://bura.brunel.ac.uk/handle/2438/26796 |
DOI: | https://doi.org/10.4271/2023-01-0279 |
ISSN: | 0148-7191 |
Other Identifiers: | ORCiD: Alexander M Lauterkorn https://orcid.org/0000-0002-8872-7719 ORCiD: Xinyan Wang https://orcid.org/0000-0002-1988-3742 ORCiD: Hua Zhao https://orcid.org/0000-0002-7876-804X 2023-01-0279 |
Appears in Collections: | Dept of Mechanical and Aerospace Engineering Research Papers |
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FullText.pdf | Copyright © 2023 SAE International. Where required by their funder, authors retain the right to distribute their author accepted manuscript (AAM), but not the final typeset version, via an institutional repository under a Creative Commons Attribution 4.0 International (CC BY 4.0) license (https://creativecommons.org/licenses/by/4.0/) for release no later than the date of first online publication, with the author including a link or citation to the final version of record on SAE Mobilus®. For further inquiries, please contact managingeditor@sae.org for journals and content@sae.org for technical papers (see: https://saemobilus.sae.org/help/open-access/ and https://www.sae.org/binaries/content/assets/cm/content/publications/journals/resources/openaccesspolicy_4.4.pdf).. Cite as: Lauterkorn, A., Wang, X., and Zhao, H., "Analysis of Combustion Cycle-to-Cycle Variation in an Optical Single Cylinder Dual-Fuel Engine," SAE Technical Paper 2023-01-0279, 2023, https://doi.org/10.4271/2023-01-0279. | 2.14 MB | Adobe PDF | View/Open |
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