Journ.PowerTech.Petrakides.pdf (2.22 MB)
On the combustion of premixed gasoline—Natural gas dual fuel blends in an optical SI engine
journal contribution
posted on 2019-07-16, 12:42 authored by Sotiris Petrakides, Daniel ButcherDaniel Butcher, Antonios PezouvanisAntonios Pezouvanis, Rui ChenNatural 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 TechnologiesVolume
98Issue
5Pages
387 - 395Citation
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 TechnologyVersion
- 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
2018-12-01Publication date
2018Notes
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
2083-4187Publisher version
Language
- en