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On the combustion of premixed gasoline - natural gas dual fuel blends in an optical SI engine
conference contributionposted on 2018-12-05, 12:09 authored by Sotiris Petrakides, Daniel ButcherDaniel Butcher, Antonios PezouvanisAntonios Pezouvanis, Rui Chen
Natural Gas (NG) is a promising alternative fuel. Historically, the slow burning velocity of NG poses significant challenges for its utilisation in energy efficient Spark Ignited (SI) engines. It has been experimentally observed that a binary blend of NG and gasoline has the potential to accelerate the combustion process in an SI engine, resulting in a faster combustion even in comparison to that of the base fuels. The mechanism of such effects remains unclear. In this work, an optical diagnosis has been integrated with in-cylinder pressure analysis to investigate the mechanism of flame velocity and stability with the addition of NG to gasoline in a binary Dual Fuel (DF) blend. Experiments are performed under a sweep of engine load, quantified by the engine intake Manifold Air Pressure (MAP) (0.44, 0.51. 0.61 Bar), and equivalence air to fuel ratio (Φ = 0.8, 0.83, 1, 1.25). NG was added to a gasoline fuelled engine in three different energy ratios 25%, 50% and 75%. The results showed that within the flamelet combustion regime, the effect of Markstein length is dominating the lean burn combustion process both from a stability and velocity prospective. The effect of the laminar burning velocity on the combustion process gradually increases as the air fuel ratio shifts from stoichiometric to fuel rich values.
- Aeronautical, Automotive, Chemical and Materials Engineering
- Aeronautical and Automotive Engineering
Published in6th International Conference on Renewable Energy Sources & Energy Efficiency
CitationPETRAKIDES, S. ... et al, 2018. On the combustion of premixed gasoline - natural gas dual fuel blends in an optical SI engine. Presented at the 6th International Conference on Renewable Energy Sources & Energy Efficiency (RESEE2018), Nicosia, Cyprus, 1-2 November 2018.
- AM (Accepted Manuscript)
Publisher statementThis work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/
NotesThis is a conference paper.