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On the combustion of premixed gasoline—Natural gas dual fuel blends in an optical SI engine

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posted on 16.07.2019 by Sotiris Petrakides, Daniel Butcher, Antonios 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 were 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 dominates 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.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Aeronautical and Automotive Engineering

Published in

Journal of Power Technologies

Volume

98

Issue

5

Pages

387 - 395

Citation

PETRAKIDES, S. .... et al., 2018. On the combustion of premixed gasoline—Natural gas dual fuel blends in an optical SI engine. Journal of Power Technologies, 98(5), pp. 387 - 395.

Publisher

© the Authors. Published by Warsaw University of Technology

Version

VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution 3.0 Unported (CC BY 3.0) licence. Full details of this licence are available at: http://creativecommons.org/licenses/by/3.0/

Acceptance date

01/12/2018

Publication date

2018

Notes

This is an Open Access Article. It is published by Warsaw University of Technology under the Creative Commons Attribution 3.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/3.0/

ISSN

2083-4187

Language

en

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