HEAD-ON QUENCHING OF TRANSIENT LAMINAR FLAME: HEAT FLUX AND QUENCHING DISTANCE MEASUREMENTS

2005 ◽  
Vol 177 (7) ◽  
pp. 1305-1322 ◽  
Author(s):  
J. SOTTON ◽  
B. BOUST ◽  
S. A. LABUDA ◽  
M. BELLENOUE
Keyword(s):  
Heat Flux ◽  
Laminar Flame ◽  
Distance Measurements ◽  
Flame Heat Flux ◽  
Quenching Distance

Quenching distance of laminar flame in aluminum dust clouds

1996 ◽  
Vol 105 (1-2) ◽  
pp. 147-160 ◽  
Author(s):  
S Goroshin ◽  
M Bidabadi ◽  
J.H.S Lee
Keyword(s):  
Laminar Flame ◽  
Dust Clouds ◽  
Quenching Distance

Electrical probe diagnostics for the laminar flame quenching distance

2010 ◽  
Vol 34 (2) ◽  
pp. 131-141 ◽  
Author(s):  
Maxime Karrer ◽  
Marc Bellenoue ◽  
Sergei Labuda ◽  
Julien Sotton ◽  
Maxime Makarov
Keyword(s):  
Laminar Flame ◽  
Probe Diagnostics ◽  
Electrical Probe ◽  
Flame Quenching ◽  
Quenching Distance

Laminar Flame Velocity of Components of Natural Gas

2011 ◽  
Author(s):  
P. Dirrenberger ◽  
P. A. Glaude ◽  
H. Le Gall ◽  
R. Bounaceur ◽  
O. Herbinet ◽  
...  
Keyword(s):  
Heat Flux ◽  
Natural Gas ◽  
Gas Turbines ◽  
Laminar Flame ◽  
Flame Stabilization ◽  
Flame Velocity ◽  
Flux Method ◽  
Radial Temperature ◽  
Flat Flame ◽  
Wide Range

Laminar burning velocities are important parameters in many areas of combustion science such as the design of burners or engines and for the prediction of explosions. They play an essential role in the combustion in gas turbines for the optimization of the nozzles and of the combustion chamber. Adiabatic laminar flame velocities are usually investigated in three types of apparatus which are currently available for that type of measurements: constant volume bombs in which the propagation of a flame is initiated by two electrodes and followed by shadowgraphy, counterflow-flame burners with axial velocity profiles determined by Particle Imaging Velocimetry, and flat flame adiabatic burners which consist of a heated burner head mounted on a plenum chamber with the radial temperature distribution measurement made by a series of thermocouples (used in this work). This last method is based on a balance between the heat loss from the flame to the burner required for the flame stabilization and the convective heat flux from the burner surface to the flame front. It was demonstrated that this heat flux method is suitable for the determination of the adiabatic flame temperature and flame burning velocity. The main hydrocarbon in natural gas is methane, with smaller amounts of heavier compounds, mainly species from C2 to C4. New experimental measurements have been performed by the heat flux method using a newly built flat flame adiabatic burner at atmospheric pressure. These measurements of laminar flame speeds are presented for components of natural gas, methane, ethane, propane and n-butane, as well as for binary and tertiary mixtures of these compounds representative of different natural gases available in the world. Results for pure alkanes were compared successfully to the literature. The composition of the investigated air/hydrocarbon mixtures covers a wide range of equivalence ratios, from 0.6 to 2.1 when it is possible to sufficiently stabilize the flame. Empirical correlations have been derived in order to predict accurately the flame velocity of a natural gas containing C1 up to C4 alkanes as a function of its composition and the equivalence ratio.

Effect of Thermal Conductivity of an Impinging Premixed Butane/Air Circular Laminar Flame Jet System

2005 ◽  
Author(s):  
Z. Zhao ◽  
T. T. Wong ◽  
C. W. Leung
Keyword(s):  
Thermal Conductivity ◽  
Heat Flux ◽  
Polynomial Function ◽  
Laminar Flame ◽  
Flame Temperature ◽  
Numerical Work ◽  
Impingement Plate ◽  
Temperature Boundary ◽  
Water Side ◽  
Temperature Boundary Condition

Numerical simulations were performed to study the heat transfer characteristics of the impingement plate of an impinging flame jet system consisting of a premixed butane/air circular flame jet impinging vertically upward upon a horizontal rectangular plate at laminar flow condition. The study concentrated mainly on the effect of thermal conductivity of the impingement plate on its heat flux. A uniform temperature boundary condition was assumed at the water-side of the plate. In order to deal with the very complicated boundary conditions at the flame-side of the plate, experimental datum of the flame temperature were correlated using a multi-polynomial function. The heat flux distributions on the impingement plate, with the variations of Reynolds number (Re), were numerically simulated. Comparison between the experimental and numerical work has been made.

scholarly journals Combustor Flame Radiation and Wall Temperatures for #2 Distillate and a Coal Derived Liquid Fuel

1982 ◽  
Author(s):  
R. J. Kuznar ◽  
E. W. Tobery ◽  
A. Cohn
Keyword(s):  
Heat Flux ◽  
Film Cooling ◽  
Liquid Fuel ◽  
Gas Temperature ◽  
Flame Radiation ◽  
Flame Heat Flux ◽  
Primary Zone ◽  
The Difference ◽  
Process Measurements ◽  
Cooling Air

Flame radiation measurements were made in the primary zone of a film cooled gas turbine combustor, while burning #2 distillate (13 percent H) and a coal derived liquid fuel (8.7 percent H), from the SRC II process. Measurements from three circumferentially located radiometers indicate an average increase in flame heat flux of 55 percent, during combustion of the SRC II blend. Individual radiometer readings measured an increase ranging from 52 to 60 percent. Analytical predictions of the average combustor metal temperature, for the SRC II blend, cannot be explained by the increase in flame heat flux alone. If the same temperature of hot gases which mix in with film cooling air is used for both fuels then the calculated temperatures for SRC II fuel would be higher than those measured. Therefore, a lower value for hot gas temperature is required for the SRC II fuel case. This difference is attributed to the difference inflame shape between the two fuels.

Effect of oxygen on flame heat flux in horizontal and vertical orientations

2008 ◽  
Vol 43 (6) ◽  
pp. 410-428 ◽  
Author(s):  
Patricia A. Beaulieu ◽  
Nicholas A. Dembsey
Keyword(s):  
Heat Flux ◽  
Flame Heat Flux ◽  
Effect Of Oxygen
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