Results 161 to 170 of about 1,089,540 (201)
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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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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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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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Numerical and experimental study of no emission in laminar partially premixed flames
Proceedings of the Combustion Institute, 2000A partially premixed methane/air flame in a two-dimensional configuration was studied in this work. The configuration was close to those used in real domestic boilers. The flame structure and flow pattern were calculated by implementing a complex chemistry and detailed transport formulation in an industrial computational fluid dynamics code (ESTET).
Gicquel, Olivier +5 more
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Flame Structure Interactions and State Relationships in an Unsteady Partially Premixed Flame
AIAA Journal, 1998In this investigation our objective is 1 ) to compare the similitude between an unsteady, two-dimensional (axisymmetric), partially premixed e ame and an analogous steady, partially premixed e amelet to determine if state relationshipsintermsofamodie edconservedscalarapplyand2 )toinvestigatee amestructureinteractionsbetween the various reaction zones ...
Suresh K. Aggarwal, Ishwar K. Puri
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LaminarTriple Flames in Partially Premixed Opposed Flows
Combustion Science and Technology, 1998Presented is an asymptotic analysis of premixed laminar flames in opposed streams under circumstances of fast chemistry and/or low rates of strain and of high Reynolds numbers. In this case there exist three distinct reaction layers, two premixed and one nonpremixed, the latter centered on the stagnation plane.
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A numerical investigation of the flame structure of an unsteady inverse partially premixed flame
Combustion and Flame, 1997Abstract The flame structure of unsteady flickering partially premixed flames is numerically investigated, and detailed results are provided for a flame established at Fr = 0.5, Re = 500, and overall Φ = 1. A numerical study is conducted in an inverse configuration in which a fuel-rich (CH4-air) annular jet is sandwiched between an axisymmetric air ...
Zhuang Shu +3 more
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