Results 141 to 150 of about 557 (183)
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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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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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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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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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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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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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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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Correlating Flame Location and Ignition Delay in Partially Premixed Combustion
SAE Technical Paper Series, 2012<div class="section abstract"><div class="htmlview paragraph">Controlling ignition delay is the key to successfully enable partially premixed combustion in diesel engines. This paper presents experimental results of partially premixed combustion in an optically accessible engine, using primary reference fuels in combination with artificial ...
Zegers, R.P.C. +5 more
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Effects of reaction mechanisms on structure and extinction of partially premixed flames
AIAA Journal, 2001The structure and extinction behavior of partially premixed flames in a counterflow configuration are investigated by using five different chemistry models. These include the C 1 and C 2 mechanisms of Peters and Rogg (Peters, N., and Rogg, B., Reduced Kinetic Mechanisms for Applications in Combustion Systems, Springer-Verlag, Berlin, 1993, pp. 8-12),
H. S. Xue, S. K. Aggarwal
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