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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/36337

Title: On the combustion of premixed gasoline - natural gas dual fuel blends in an optical SI engine
Authors: Petrakides, Sotiris
Butcher, Daniel S.A.
Pezouvanis, Antonios
Chen, Rui
Keywords: Dual fuel
Natural gas
Engine combustion
Flame stretch
Markstein length
Issue Date: 2018
Citation: PETRAKIDES, 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.
Abstract: 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.
Description: This is a conference paper.
Version: Accepted for publication
URI: https://dspace.lboro.ac.uk/2134/36337
Publisher Link: http://www.mse.com.cy/resee2018/
Appears in Collections:Conference Papers and Presentations (Aeronautical and Automotive Engineering)

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