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Experimental study on stoichiometric laminar flame velocities and Markstein lengths of methane and PRF95 dual fuels

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journal contribution
posted on 27.06.2016, 10:08 by Sotiris Petrakides, Rui ChenRui Chen, Dongzhi Gao, Haiqiao Wei
Natural gas is one of the most promising alternative fuels. The main constituent of natural gas is methane. The slow burning velocity of methane poses significant challenges for its utilization in future energy efficient combustion applications. Methane-gasoline dual fuelling has the potential to improve methane’s combustion. The fundamental combustion characteristics of a methane-gasoline Dual Fuel (DF) blend needs further investigation. In the current experimental study, the relationship between laminar flame velocity and Markstein length, with the ratio of gas to liquid in a DF blend has been investigated using spherical flames in a constant volume combustion vessel. A binary blend of primary reference fuels (PRF95) was used as the liquid fuel. Methane was added to PRF95 in three different energy ratios 25%, 50% and 75%. Values of the stoichiometric laminar flame velocities and Markstein lengths are measured at pressures of 2.5, 5, 10 Bar and a temperature of 373 K. It has been found that with a 25% increase in the DF ratio, the Markstein length is reduced by 15%, 21%, 32% at a pressure of 2.5, 5 and 10 Bar respectively whereas at the same pressures the laminar flame velocity is reduced by 2%, 3% and 5%. The flame evolution at the early stages of combustion is found to be faster with an increase in the DF ratio, and gradually as the flame develops it becomes slower.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Aeronautical and Automotive Engineering

Published in

Fuel

Volume

182

Pages

721 - 731

Citation

PETRAKIDES, S. ...et al., 2016. Experimental study on stoichiometric laminar flame velocities and Markstein lengths of methane and PRF95 dual fuels. Fuel, 182, pp. 721-731.

Publisher

© Elsevier

Version

AM (Accepted Manuscript)

Publisher statement

This 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/

Acceptance date

07/06/2016

Publication date

2016

Notes

This paper was accepted for publication in the journal Fuel and the definitive published version is available at http://dx.doi.org/10.1016/j.fuel.2016.06.047

ISSN

0016-2361

eISSN

1873-7153

Language

en