Results 191 to 200 of about 1,782 (225)

Turbulent flame propagation in partially premixed combustion

Symposium (International) on Combustion, 1998
Stratified 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, 2008
Fully 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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An Experimental Investigation of Scalar Mixing and Flame Structure of a Partially Premixed Flame

Combustion Science and Technology, 2020
Experimental investigation of a partially premixed flame stabilized in a combination of bluff body and swirling flowfields is reported.
Rajesh Sadanandan, Jens Brunzendorf, Michael Paul, Holger Grosshans, Detlev Markus   +4 more
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Effect of pressure on counterflow H2–air partially premixed flames

Combustion and Flame, 2005
A 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, Ishwar Puri, Suresh Aggarwal   +2 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., Aussems, J.E.E., Somers, L.M.T., Dam, N. J., Luijten, C.C.M., de Goey, L.P.H.   +5 more
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Effects of reaction mechanisms on structure and extinction of partially premixed flames

AIAA Journal, 2001
The 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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Numerical and experimental study of no emission in laminar partially premixed flames

Proceedings of the Combustion Institute, 2000
A 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, Miquel, Philippe, Quilichini, Virigine, Hilka, Martin, Thevenin, D., Darabiha, Nasser   +5 more
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A numerical investigation of the flame structure of an unsteady inverse partially premixed flame

Combustion and Flame, 1997
Abstract 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, Suresh K. Aggarwal, Viswanath R. Katta, Ishwar K. Puri   +3 more
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Premixed and Partial Premixed Turbulent Flames at High Reynolds Number

2018
Methane/air premixed and partially premixed turbulent flames at high Reynolds number are characterized using Direct Numerical Simulations (DNS) with detailed chemistry in a spatially evolving slot Bunsen configuration. Two sets of simulations are performed. A first set of simulations with fully premixed inlet conditions is considered in order to assess
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LaminarTriple Flames in Partially Premixed Opposed Flows

Combustion Science and Technology, 1998
Presented 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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