Laminar burning velocities at elevated pressures for gasoline and gasoline surrogates associated with RON

Mannaa, Ossama; Mansour, Morkous S.; Roberts, William L.; Chung, Suk Ho

doi:10.1016/j.combustflame.2015.01.004

Cited by 124 publications

(96 citation statements)

References 38 publications

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“…The chemical paths leading to the initiation and/or recombination reactions during the combustion of a DF blend can explain the response of S u 0 with the DF ratio. However, as stated by Baloo et al [13] and supported by the authors, detailed chemical kinetics of the blend fuel that will develop the understanding on the response of S u 0 with the DF ratio are currently unavailable.…”

Section: Laminar Flame Velocitymentioning

confidence: 99%

“…Iso-octane as well as binary blends of primary reference fuels have been widely adopted as convenient gasoline surrogates. Studies reporting values of laminar flame velocities at elevated pressures have been conducted for gasoline (10,11) and its surrogates (11,12,13,14) as well as methane (15,16,17). In all the above studies the reported laminar flame velocity of methane is consistently lower compared to that of gasoline and its surrogates when tested at similar conditions.…”

Section: Introductionmentioning

confidence: 97%

“…Despite its limitations, the extrapolation of a spherical outwardly propagating flame to its zero stretch using the Markstein method is widely accepted and used in literature (9)(10)(11)(12)(13)(14)(15)(16)18). The Markstein theory has been used in the present study in order to allow for a comparison with the existing related literature information.…”

Section: Flame Theorymentioning

confidence: 99%

“…A common approach of measuring burning velocity and Markstein length in a combustion vessel has been the constant pressure outwardly propagating spherical flame method (10)(11)(12)(13)(14)(15)(16)18,19). The method is suitable for extrapolation of measured stretched burning velocities to their fundamental non-stretched values and the associate Markstein lengths, due to the welldefined stretch rates of an outwardly spherical flame.…”

Section: Flame Theorymentioning

confidence: 99%

“…The method is suitable for extrapolation of measured stretched burning velocities to their fundamental non-stretched values and the associate Markstein lengths, due to the welldefined stretch rates of an outwardly spherical flame. The constant pressure outwardly propagating spherical flame method in combination with the theory given by Strehlow and Savage (20) have been used by most of the studies in literature (9,10,11,13,14). The theory of Strehlow and Savage derived on the assumption that the burned gas is coming to rest after crossing an infinitesimally thin flame.…”

Section: Flame Theorymentioning

confidence: 99%

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Experimental Investigation on the Laminar Burning Velocities and Markstein Lengths of Methane and PRF95 Dual Fuels

et al. 2016

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Natural gas is a promising alternative fuel. 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. The effects of methane addition to PRF95 on the fundamental combustion parameters, laminar burning velocity (S u 0 ) and Markstein length (L b ), were experimentally investigated in a cylindrical combustion vessel at equivalence ratios of 0.8, 1, and 1.2, initial pressures of 2.5, 5, and 10 bar, and a constant temperature of 373 K. Methane was added to PRF95 in three different energy ratios 25%, 50%, and 75%. Spherically expanding flames were used to derive the flow-corrected flame velocities, from which the corresponding L b and S u 0 were obtained. The flame velocities were corrected for the motion of burned gas induced by the cylindrical confinement. It has been found that at stoichiometric conditions there is a linear decrease in L b and S u 0 with the dual fuel (DF) ratio in all investigated pressures. At rich conditions, all DFs resulted in having lower S u 0 as compared to methane and to a larger extent PRF95. The values of L b for all DFs were lower than methane and comparable to those of PRF95. At lean conditions, the values of L b for all DFs are biased toward those of methane whereas the values of S u 0 are found to be higher than those of PRF95 at pressures of 2.5 and 5 bar. At 10 bar both L b and S u 0 reduce with DF ratio although S u 0 of all DFs converge to that of PRF95. The findings of the current study indicate a distinct synergy in the utilization of dual fueling in future lean burn energy efficient combustion applications.

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Section: Laminar Flame Velocitymentioning

confidence: 99%