scholarly journals A Coalescence/Dispersion Model for Turbulent Flame Stability

AIAA Journal ◽  
1984 ◽  
Vol 22 (3) ◽  
pp. 388-393 ◽  
Author(s):  
Krishnan Radhakrishnan ◽  
David T. Pratt
Keyword(s):  
Dispersion Model ◽  
Turbulent Flame ◽  
Flame Stability

Analysis of Lift off Height and Blow-Off Mechanism of Turbulent Flame by V-Gutter Bluff Body

2015 ◽  
Vol 787 ◽  
pp. 727-731 ◽  
Author(s):  
S. Boopathi ◽  
P. Maran ◽  
V. Caleb Eugene ◽  
S. Prabhu
Keyword(s):  
Bluff Body ◽  
Recirculation Zone ◽  
Turbulent Flame ◽  
Flame Stability ◽  
Bluff Bodies ◽  
Combustion Instabilities ◽  
Test Rig ◽  
Square Duct ◽  
Flame Holder ◽  
Lift Off

The experimental investigation has been carried out to study the stabilization and blowout mechanisms of turbulent flame stabilized by V-gutter bluff body in a square duct at reactive and non-reactive conditions. V-shaped bluff bodies made of stainless steel having 1.6 mm thicknessare used for stabilization of the flame.Experiments have been conducted at selective velocities of commercially available methane and oxygen with 60 degree V-gutter as flame holder. It is observed that at stoichiometric conditions, the V-gutter is dominated by shear layer stabilized flames. The flame stability is influenced by bluff body dimensions and mass flow rate which play a major role in combustion instabilities mixing of air fuel ratio and blow off. The lift off decreases at higher blockage ratios.A strong recirculation zone is found in this test rig immediately downstream of the V-Gutter which gradually subsides and disappears far downstream.The lift off height is not much affected by the velocity of the fuel-air mixture.

scholarly journals Evaluation of partially premixed turbulent flame stability from mixture fraction statistics in a slot burner

2018 ◽  
pp. 1-17 ◽  
Author(s):  
Stephan Kruse ◽  
Mohy S. Mansour ◽  
Ayman M. Elbaz ◽  
Emilien Varea ◽  
Gerd Grünefeld ◽  
...  
Keyword(s):  
Mixture Fraction ◽  
Turbulent Flame ◽  
Flame Stability ◽  
Partially Premixed ◽  
Premixed Turbulent Flame

Analysis of LPG diffusion flame in tube type burner

2019 ◽  
Vol 13 (3) ◽  
pp. 5278-5293
Author(s):  
Vipul Patel ◽  
Rupesh Shah
Keyword(s):  
Diffusion Flame ◽  
Emission Characteristic ◽  
Flame Stability ◽  
Liquefied Petroleum Gas ◽  
Air Velocity ◽  
Length Fraction ◽  
Low Emission ◽  
Tube Type ◽  
Stability Limits ◽  
Co Emission

The present research aims to analyse diffusion flame in a tube type burner with Liquefied petroleum gas (LPG) as a fuel. An experimental investigation is performed to study flame appearance, flame stability, Soot free length fraction (SFLF) and CO emission of LPG diffusion flame. Effects of varying air and fuel velocities are analysed to understand the physical process involved in combustion. SFLF is measured to estimate the reduction of soot. Stability limits of the diffusion flame are characterized by the blowoff velocity. Emission characteristic in terms of CO level is measured at different equivalence ratios. Experimental results show that the air and fuel velocity strongly influences the appearance of LPG diffusion flame. At a constant fuel velocity, blue zone increases and the luminous zone decreases with the increase in air velocity. It is observed that the SFLF increases with increasing air velocity at a constant fuel velocity. It is observed that the blowoff velocity of the diffusion flame increases as fuel velocity increases. Comparison of emission for flame with and without swirl indicates that swirl results in low emission of CO and higher flame stability. Swirler with 45° vanes achieved the lowest CO emission of 30 ppm at Φ = 1.3.

Effects of coflow on turbulent flame puffs

AIAA Journal ◽  
2002 ◽  
Vol 40 ◽  
pp. 1355-1362
Author(s):  
J. C. Hermanson ◽  
R. Sangras ◽  
J. E. Usowicz ◽  
H. Johari
Keyword(s):  
Turbulent Flame

ROCK OIL RESERVOIR STRUCTURE INFLUENCE ON THE FLAME STABILITY OF THE IN-SITU COMBUSTION RECOVERY METHOD

2019 ◽  
Author(s):  
Lucas Henrique Pagoto Deoclecio ◽  
Filipe Arthur Firmino Monhol ◽  
Antônio Carlos Barbosa Zancanella
Keyword(s):  
Flame Stability ◽  
Oil Reservoir ◽  
In Situ Combustion ◽  
Recovery Method

Mass Transfer in Liquid in an Apparatus with Mobile Packing. Application of a Dispersion Model

1993 ◽  
Vol 58 (5) ◽  
pp. 1078-1086
Author(s):  
Zdeněk Palatý
Keyword(s):  
Experimental Data ◽  
Mass Transfer ◽  
Empirical Equation ◽  
Dispersion Model ◽  
Transfer Coefficients ◽  
Mass Transfer Coefficients

The paper deals with the mass transfer in a liquid on a plate with mobile packing. A procedure has been suggested which enables estimation of the mass transfer coefficients from experimental data considering the dispersion flow of the liquid. The results obtained from the desorption of CO2 from water are presented graphically and in the form of empirical equation.

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