Turbulent flame studies in two-dimensional open burners

Grover, John H.; Fales, E. N.; Scurlock, A.C.

doi:10.1016/s0082-0784(63)80008-9

Cited by 11 publications

(6 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The turbulent burning velocities were determined using the mean angle method similar to the one adopted by Rangwala et al , and Grover et al, who averaged the measured flame height in several images to determine the burning velocity of a turbulent flame. Measurements of the turbulent burning velocity using a Bunsen-type burner and a flame-angle method have been widely implemented by many authors.…”

Section: Methodsmentioning

confidence: 99%

“…Flames were generated in a nozzle-type Bunsen burner and then analyzed using Schlieren photography. The experimental setup and methodology to obtain S T which are discussed belowhave been used before by Kobayashi et al, − Rangwala et al, , Wang et al, , Cardona et al, and Grover et al for methane and different hydrocarbon mixtures. It has been reported that this methodology is one of the most appropriate one to obtain S T because flames are stationary, and it is possible to perform long-time measurements.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Burning Velocity of Turbulent Methane/Air Premixed Flames in Subatmospheric Environments

et al. 2020

View full text Add to dashboard Cite

The aim of our work was to study turbulent premixed flames in subatmospheric conditions. For this purpose, turbulent premixed flames of lean methane/air mixtures were stabilized in a nozzle-type Bunsen burner and analyzed using Schlieren visualization and image processing to calculate turbulent burning velocities by the mean-angle method. Moreover, hot-wire anemometer measurements were performed to characterize the turbulent aspects of the flow. The environmental conditions were 0.85 atm, 0.98 atm, and 295 ± 2 K. The turbulence–flame interaction was analyzed based on the geometric parameters combined with laminar flame properties (which were experimentally and numerically determined), integral length scale, and Kolmogorov length scale. Our results show that the effects of subatmospheric pressure on turbulent burning velocity are significant. The ratio between turbulent and laminar burning velocities increases with turbulence intensity, but this effect tends to decrease as the atmospheric pressure is reduced. We propose a general empirical correlation as a function between S T / S L and u ′/ S L based on the experimental results obtained in this study and the equivalence ratio and pressure we established.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Burning Velocity of Turbulent Methane/Air Premixed Flames in Subatmospheric Environments

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The values of assumed simplistic reaction of fuel and oxygen molecules . Grover et at. (1963); e -Hamamoto et at.…”

Section: Flame Stretchmentioning

confidence: 99%

Flame stretch rate as a determinant of turbulent burning velocity

Bradley

Lau

Lawes

et al. 1992

Phil. Trans. R. Soc. Lond. A

254

View full text Add to dashboard Cite

A rational basis for correlating turbulent burning velocities is shown to involve the product of the Karlovitz stretch factor and the Lewis number. A generalized expression is derived to show how flame stretch is related to the velocity field. A new dimensionless correlation of experimental values of turbulent burning velocities is presented. Dimensionless groups also are used in correlations of laminar and turbulent flame extinction stretch rates. A distribution function of stretch rates in turbulent flames, based on an earlier one of Yeung et al ., is proposed and the experimental data are well predicted by a theory based on flamelet extinction by flame stretch with this distribution. Uncertainties arise concerning the role of negative stretch rate. Laminar flamelet modelling of complex combustion appears to have a broader validity than might be expected and some explanation for this is offered.

show abstract

“…(2) has been validated mainly for the expanding flames (Lipatnikov and Chomiak, 2002) due to the abundance of experimental data that show the growth of the speeds of such flames with time. As concerns to the statistically stationary flames, there have been a few experimental investigations (Grover et al, 1963;Sattler et al, 2002) that indicate an increase in the flame speed with distance from a flameholder. Lipatnikov and Chomiak (2002, see Figure 30) validated Eq.…”

mentioning

confidence: 99%

“…Lipatnikov and Chomiak (2002, see Figure 30) validated Eq. (2) using the experimental data obtained by Grover et al (1963) from statistically stationary conical flames. Recently, Sathiah and Lipatnikov (2007) used Eq.…”

mentioning

confidence: 99%

Effects of Turbulent Flame Speed Development and Axial Convective Waves on Oscillations of a Long Ducted Flame

Sathiah

Lipatnikov

2007

Combustion Science and Technology

View full text Add to dashboard Cite

Response of a premixed turbulent flame stabilized behind a bluff body in a cylindrical duct to weak, one-dimensional, uniform or non-uniform (the so-called ''axial convective waves''), harmonic perturbations of the oncoming flow velocity is studied by extending the well-known kinematic model of such flame oscillations in order to allow for flame speed increase with distance from the bluff body for a long flame. Such an increase is an important peculiarity of practical premixed turbulent flames, which develop as convected by the mean flow from a flameholder. Comparison of results computed in the cases of a constant or increasing flame speed shows that the flame speed development notably affects both the gain and phase of the flame transfer function, the effects being more pronounced for the axial convective waves as far as the gain of the transfer function is concerned.

show abstract

Turbulent flame studies in two-dimensional open burners

Cited by 11 publications

References 6 publications

Burning Velocity of Turbulent Methane/Air Premixed Flames in Subatmospheric Environments

Burning Velocity of Turbulent Methane/Air Premixed Flames in Subatmospheric Environments

Flame stretch rate as a determinant of turbulent burning velocity

Effects of Turbulent Flame Speed Development and Axial Convective Waves on Oscillations of a Long Ducted Flame

Contact Info

Product

Resources

About