Results 31 to 40 of about 592,637 (278)
Burned Gas Characteristics of Laminar Lifted Flame at the Beginning of Stream Heating
Journal of Thermal Science and Technology, 2011 This research experimentally investigates the exhaust gas characteristics of a methane-air lifted-jet flame with elevated stream temperatures up to 450 K. Emission indices of NOx and CO were measured by direct gas sampling using a gas detector tube.
Mitsutomo HIROTA +2 more
doaj +1 more source
Simulation of a supersonic hydrogen-air autoignition-stabilized flame using reduced chemistry [PDF]
, 2012 A three-step mechanism for H2-air combustion (Boivin et al., Proc. Comb. Inst. 33, 2010) was recently designed to reproduce both autoignition and flame propagation, essential in lifted flame stabilization.
Boivin, Pierre +3 more
core +2 more sources
Applications in Energy and Combustion Science, 2021 Ensuring efficient and clean combustion performance of liquid-fueled engines requires comprehension of the influence of fuel composition and properties on flame behavior, such as flame liftoff height (LOH) and lean blowout limit (LBO).
Radi Alsulami +4 more
doaj +1 more source
Simulation of hydrogen auto-ignition in a turbulent co-flow of heated air with LES and CMC approach [PDF]
, 2011 Large-Eddy Simulations (LES) with the first order Conditional Moment Closure (CMC) approach of a nitrogen-diluted hydrogen jet, igniting in a turbulent co-flowing hot air stream, are discussed. A detailed mechanism (nine species, 19 reactions) is used to
Lacor, Chris +4 more
core +1 more source
Instantaneous flame-stabilization velocities in lifted-jet diffusion flames
Combustion and Flame, 1997 Liftoff height and velocity measurements are presented for turbulent, lifted methane and ethylene flames. A range of Reynolds numbers from 3800 to 22,000 is investigated, and the effect of coflow velocity is examined. The mean liftoff height is shown to increase with jet-exit and coflow velocity, while the rms fluctuation about the mean increases with ...
L. Muñiz, M.G. Mungal
openaire +1 more source
Analysis of auto-ignition of heated hydrogen-air mixtures with different detailed reaction mechanisms [PDF]
, 2011 Auto-ignition processes of hydrogen, diluted with nitrogen, in heated air are numerically investigated by means of an unsteady laminar flamelet approach in mixture fraction space. The focus is on the auto-ignition delay time and the most reactive mixture
Merci, Bart, Stankovic, Ivana
core +1 more source
Mechanisms of flame stabilisation at low lifted height in a turbulent lifted slot-jet flame
Journal of Fluid Mechanics, 2015 A turbulent lifted slot-jet flame is studied using direct numerical simulation (DNS). A one-step chemistry model is employed with a mixture-fraction-dependent activation energy which can reproduce qualitatively the dependence of the laminar burning rate on the equivalence ratio that is typical of hydrocarbon fuels. The basic structure of the flame base
Shahram Karami +3 more
openaire +2 more sources
Characteristics Of Large Diffusion Flames Burning In A Vitiated Atmosphere [PDF]
, 1991 Experiments concerning properties of large diffusion flames burning steadily in a vitiated atmosphere under conditions similar to those which may arise in a room fire are described. The effects of vitiation on the products of combustion and flame lengths,
Kubota, T. +2 more
core +1 more source
Stability and Liftoff of a N2-in-H2 Jet Flame in a Vitiated Co-flow at Atmospheric Pressure
Eurasian Chemico-Technological Journal, 2014 The stability and liftoff characteristics of a nitrogen (N2) diluted hydrogen (H2) jet flame in a vitiated co-flow are investigated experimentally with particular attention focused on regimes where multiple stabilization mechanisms are active ...
A. A. North +4 more
doaj +1 more source
The anchoring of gaseous jet diffusion flames in stagnant air [PDF]
, 2002 A numerical analysis is presented to describe the structure of the attachment region of gaseous jet diffusion flames in stagnant air. For the typical Reynolds numbers encountered in applications, the region of flame attachment, in the near wake at the ...
Fernández Tarrazo, Eduardo +2 more
core +2 more sources