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Fuel effects on NOx emissions in partially premixed flames
Combustion and Flame, 2004Abstract The requirement to significantly reduce NOx and particulate emissions while maintaining combustor performance is one of the main drivers for internal combustion engine research. Partially premixing and using fuel blends represent two promising approaches for reducing both the NOx and the particulate emissions from flames.
Suresh Aggarwal, Sayangdev Naha
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Combustion Modeling of Partially Premixed Flames
Volume 2: Combustion, Fuels and Emissions, Parts A and B, 2010Accurate and properly validated turbulence-chemistry interaction models for RANS combustion computational fluid dynamics (CCFD) simulations are required in support of the development process of modern gas turbine combustors. Although standard models are available for fully premixed and purely non premixed turbulent combustion, models describing ...
Ilona Zimmermann, Michael Pfitzner
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Edge flames and partially premixed combustion in diffusion flame quenching
Combustion and Flame, 2001The aim is to focus on the development of partially premixed combustion after diffusion flame quenching. To this end, the quenching of a planar two-dimensional diffusion flame is studied by using numerical simulation. A flame hole is obtained by submitting the reaction zone to a high strain and scalar dissipation rate resulting from the interaction ...
Vervisch, Luc, Favier, Valérie
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An experimental study of partially premixed flame sound
Proceedings of the Combustion Institute, 2005Abstract The occurrence of oscillating combustion and combustion instability has led to resurgence of interest in the causes, mechanisms, suppression, and control of combustion noise. Noise generated by enclosed flames is of greater practical interest but is more complicated than that by open flames, which itself is not clearly understood.
Kapil K. Singh +4 more
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Partial premixing and stratification in turbulent flames
Proceedings of the Combustion Institute, 2015Abstract This paper reviews recent advances in understanding the structure of turbulent partially premixed and stratified flames. The term “partially premixed” refers here to compositionally inhomogeneous mixtures that include flammable and non-flammable fluid while “stratified” combustion refers to a reacting front propagating through a range of ...
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Multiple mapping conditioning for flames with partial premixing
Combustion and Flame, 2008Fully closed multiple mapping conditioning (MMC) is used to model partially premixed flames in homogeneous, isotropic decaying turbulence where the partial premixing is caused by local extinction and reignition phenomena. Two reference variables that represent mixing and reaction progress, such as mixture fraction and sensible enthalpy, are used to ...
Kronenburg, A., Cleary, M. J.
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A study of partially premixed unconfined propane flames
Combustion and Flame, 1994Unconfined turbulent partially premixed propane/air flames issuing from a straight tube into quiescent air at atmospheric pressure and temperature are investigated. Experiments on lifted flames are performed. Flame height and liftoff are reported together with emission indices for oxides of nitrogen (NO[sub 3]).
Nils A. Røkke +2 more
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Turbulent flame propagation in partially premixed combustion
Symposium (International) on Combustion, 1998Stratified spark-ignition engines that use direct fuel injection into the combustion chamber feature both small- and large-scale spatial variations in unburned mixture composition. In these configurations, the spark-ignited turbulent flame propagates into a mixture with variable equivalence ratio.
J. Hélie, A. Trouvé
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An Experimental Investigation of Scalar Mixing and Flame Structure of a Partially Premixed Flame
Combustion Science and Technology, 2020Experimental investigation of a partially premixed flame stabilized in a combination of bluff body and swirling flowfields is reported.
Rajesh Sadanandan +4 more
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Effect of pressure on counterflow H2–air partially premixed flames
Combustion and Flame, 2005A computational investigation of high-pressure hydrogen–air partially premixed flames (PPFs) is reported to characterize the effect of pressure on the flame structure, and the relevance of reaction limits for these flames. The flames are computed using the Mueller mechanism consisting of 19 elementary reactions and 9 species. Although the mechanism has
Alejandro Briones +2 more
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