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dc.contributor.authorTavakoli, Sadi
dc.contributor.authorVincent Jensen, Michael
dc.contributor.authorPedersen, Eilif
dc.contributor.authorSchramm, Jesper
dc.identifier.citationJournal of Marine Science and Technology. 2020, .en_US
dc.description.abstractAlthough natural gas is documented as a low-emission fuel compared to the other traditional fossil fuels in internal combustion engines, recent research indicates large amounts of methane emission released by lean burn gas engines and highlights the importance of this emission on global warming. This paper aims at illustrating the main sources of unburned fuel in internal combustion engines with an emphasis on spark ignited natural gas engines. In addition, two unburned hydrocarbon modeling patterns, empirical and thermodynamic, are proposed. Moreover, a verified engine model including all components with an implemented dynamic load based on harmonic sea waves has been set up and coupled to the unburned hydrocarbon formation models. Results show that load variation may contribute to further methane slip and this increment rises sharply when the load amplitude enlarges. The maximum amount of methane slip occurs at reduced loads when the time lag of the control system of the turbocharger causes additional fresh air to flow towards the combustion chamber and brings the flame into the quenching area. As well, inspecting unburned hydrocarbon emission in diverse air–fuel ratios but with the same wave frequency and amplitude uncovers the sensitivity of lean burn gas engines to the dynamic load.en_US
dc.publisherSpringer Verlagen_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.titleUnburned Hydrocarbon Formation in a Natural Gas Engine Under Sea Wave Load Conditionsen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.source.journalJournal of Marine Science and Technologyen_US
dc.description.localcodeThis article is licensed under a Creative Commons Attribution 4.0 International Licenseen_US

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