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Stabilization mechanism of lifted jet diffusion flames
Symposium (International) on Combustion, 1994Flame lift and stabilization are studied using numerical simulations of diffusion flames resulting from amethane jet injected into an air background. The numerical model solves the time-dependent, axisymmetric, multidimensional Navier-Stokes equations coupled to submodels for chemical reaction and heat release, soot formation and radiation transport ...
Kaplan, C.R. +2 more
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Spark ignition of lifted turbulent jet flames
Combustion and Flame, 2006This paper presents experiments on ignition and subsequent edge flame propagation in turbulent nonpremixed methane jets in air. The spark position, energy, duration, electrode diameter and gap, and the jet velocity and air premixing of the fuel stream are examined to study their effects on the ignition probability defined as successful flame ...
S AHMED, E MASTORAKOS
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Combustion Structures in Lifted Ethanol Spray Flames
Journal of Engineering for Gas Turbines and Power, 2004The development of a double flame structure in lifted ethanol spray flames is visualized using OH planar laser-induced fluorescence (PLIF). While the OH images indicate a single reaction zone exists without co-flow, the addition of low-speed co-flow facilitates the formation of a double flame structure that consists of two diverging flame fronts ...
Stephen K. Marley +2 more
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Theory of attached and lifted diffusion flames
Physics of Fluids, 1998Diffusion flame (DF) attachment and liftoff are examined, leading to (1) explanations of the origins of previous, successful empirical correlations; (2) the discovery of multiple lifting regimes. The latter includes a very slow flow regime, a slow-to-moderate flow regime, and a moderate-to-fast flow regime.
Wichman, Indrek S., Ramadan, Bassem
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Numerical modeling of turbulent nonpremixed lifted flames
KSME International Journal, 2004The present study has focused on numerical investigation on the flame structure, flame lift-off and stabilization in the partially premixed turbulent lifted jet flames. Since the lifted jet flames have the partially premixed nature in the flow region between nozzle exit and flame base, level set approach is applied to simulate the partially premixed ...
Hoojoong Kim, Yongmo Kim, Kook-young Ahn
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LES of a turbulent lifted methanol spray flame using a novel spray flamelet/ progress variable model
Energy, 2023Yicun Wang +5 more
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Lifted Flames and the Effects of Inhibitors
Combustion Science and Technology, 1995Abstract The blowoff and liftoff characteristics of lifted turbulent diffusion flames of liquefied petroleum gas and compressed natural gas are investigated with a range of burner diameters. Uninhibited flames as well as flames inhibited by either Bromotrifluoromethane, (CF3Br known as Halon-1301), N2or Ar have been studied. The coflowing air stream is
A. R. MASRI, T. C. CLARKE
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Analysis of Stabilization Mechanisms in Lifted Flames
AIP Conference Proceedings, 2009Flame stabilization and the mechanisms that govern the dynamics at the flame base have been subject to numerous studies in recent years. Recent results using a combined Large Eddy Simulation‐Conditional Moment Closure (LES‐CMC) approach to model the turbulent flow field and the turbulence‐chemistry interactions has been successful in predicting flame ...
S. Navarro-Martinez +4 more
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Stability of lifted flames in centerbody burner
Combustion and Flame, 2011Abstract The centerbody burner was designed with the objective of understanding the coupled processes of formation, growth, and burn-off of soot through decoupling them using recirculation zones (RZs). Experimentally it was found that the sooting characteristics of the centerbody burner could be altered dramatically via simple changes in the ...
V.R. Katta +2 more
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