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Characteristics of Laminar Lifted Flames in a Partially Premixed Jet
Combustion Science and Technology, 1997Abstract The liftoff and blowout characteristics of laminar flames in a partially premixed jet are studied for propane and n-butane fuels mixed with air. As the flow rate increases, flame lifts off from a nozzle attached flame and liftoff height increases highly nonlinearly with flow rate, and then blowout occurs.
Bong Jae Lee, S H Chung
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Simulation of Premixed and Partially Premixed Jet-in-Crossflow Flames at High-Pressure
Volume 4B: Combustion, Fuels, and Emissions, 2020Abstract In this paper we explore the operational map of a lean axial-staged combustor of premixed and partially premixed reacting jet-in-crossflow flames at high-pressure (5 atm). This study attempts to expand the data to relatively high pressure and could significantly aid scaling to real gas turbine engine conditions at 20–30 atm ...
Bernhard Stiehl +7 more
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Extinction of partially premixed flames
Proceedings of the Combustion Institute, 2002Experimental and numerical studies on extinction of laminar partially premixed flames are carried out. The studies are performed in the counterflow configuration. A premixed fuel-rich mixture of methane (CH 4 ), oxygen (O 2 ), and nitrogen (N 2 ) is injected from one duct while a fuel-lean mixture of CH 4 , O 2 , and N 2 is injected from the other ...
R. Seiser, L. Truett, K. Seshadri
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Flame stretch effects on partially premixed flames
Combustion and Flame, 2000Abstract Flame stretch is an important characteristic of flame behavior that arises due to flow motion and nonuniformity, and flame curvature. Various investigators have obtained different expressions for flame stretch by employing dissimilar analytical approaches for diverse flame configurations.
Chun W Choi, Ishwar K Puri
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Modelling and Calculation of a Partially Premixed Turbulent Flame
Combustion Science and Technology, 1999A partially premixed turbulent flame has been modelled using the laminar flamelet concept, i.e. the assumption that laminar flames are embedded in the turbulent flow field. A combination of a premixed flamelet model and a diffusion flamelet model has been used for modelling this partially premixed flame.
Ovink, R., Lamers, A.P.G.G.
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Partially premixed turbulent flame propagation in jet flames
Symposium (International) on Combustion, 1994Flamelet formulations for premixed and non-premixed combustion are combined in order to treat partiallypremixed combustion in the fast chemistry limit. The flamelet concept for non-premixed combustion is based on the equation for the mixture fraction Z (x, t ), while that for premixed combustion uses a field equation for the scalar field G (x, t ...
C.M. Müller, H. Breitbach, N. Peters
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NO formation in counterflow partially premixed flames
Combustion and Flame, 2007An experimental and computational study of NO formation in low-strain-rate partially premixed methane counterflow flames is reported. For progressive fuel-side partial premixing the peak NO concentration increased and the NO distribution along the stagnation streamline broadened.
Hemant Mungekar, Arvind Atreya
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Partial premixing in diffusion flame quenching
ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik, 2001AbstractUsing Direct Numerical Simulation, we focus on the development of partial premixing in laminar diffusion flame quenching. Calculations are performed in the configuration of a 2‐D diffusion flame squeezed by a pair of vortices. First, the flame undergoes strong finite rate chemistry effects, linked to high levels of strain rate induced by ...
Favier, V., Vervisch, L.
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Influence of Fuel Premixing on Partially Premixed Flames in Porous-Wall Channels
International Journal of Nonlinear Sciences and Numerical Simulation, 2017Abstract This paper examines the influence of mixing a fuel with an oxidizer-rich reactant on the existence and propagation of partially premixed flames formed in a porous-wall channel. The amount of the injected fuel has been taken as a parameter to generate different states of the combustion mixtures.
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Partially premixed flames in stagnating turbulence: The merging of planar triple flames
Combustion and Flame, 2008Abstract The aim of this work, which takes a RANS perspective, is to consider the prospect of establishing a planar turbulent triple flame whose mean consists of two parallel premixed flame brushes separated by a nonpremixed flame brush. Experiments involving a counterflow between fuel-rich and fuel-lean turbulent streams are considered.
Bray, K.N.C., Champion, M., Libbay, P.A
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