Experimental study of turbulent syngas/methane/air flames at a sub-atmospheric condition

Cardona, Ananías García; García, Alex M.; Cano, Fidel; Arrieta, Carlos E.; Yepes, Hernando A.; Amell, Andrés

doi:10.1088/1742-6596/1409/1/012012

Cited by 3 publications

(7 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To make comparisons of the experimental results obtained in the present work, different theoretical correlations proposed by some authors are plotted. These correlations correspond 8)- (10). Other authors (in ( 11)) using values for the constant C = 1.6 and n = 0.3, same as the doctoral work developed by [16]).…”

Section: Theoretical Correlations To Determine the Turbulent Burning ...supporting

confidence: 53%

“…Many correlations between laminar burning velocity and turbulent burning velocity have been studied in general terms by different authors [9][10][11][12]. Studies have also focused on the study of methane and air premix flames, arriving at correlations for the turbulent burning velocity S T = f(S L , u′, P) as a function of laminar burning velocity, turbulence intensity and pressure.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental study of the correlation for turbulent burning velocity at subatmospheric pressure

2022

View full text Add to dashboard Cite

Turbulent burning velocity is one of the most relevant parameters to characterize the premixed turbulent flames. Different correlation has been proposed to estimate this parameter. However, most of them have been obtained using experimental data at atmospheric pressure or higher. The present study is focused on obtaining a correlation for the turbulent burning velocity using data at sub-atmospheric pressure. The turbulent burning velocity was experimentally calculated using the burner method, where turbulent premix flames are generated in a Bunsen burner. Stoichiometric and lean conditions were evaluated at a pressure of 0.85 atm and 0.98 atm, whereas the turbulence intensity was varied for each condition. Perforated plates and a hot-wire anemometer were used to generate and measure the turbulence intensity. Schlieren images were used to obtain the average angle of the flame and calculate the turbulent burning velocity. Experiments and theory show that the turbulent deflagration rate decrease as pressure decrease. The turbulent deflagration speed decreased by up to 16 % at 0.85 atm concerning atmospheric conditions for the same turbulence intensity, discharge velocity, and ambient temperature, according to the experimental results. The comparison among the experimental results at sub-atmospheric conditions and the correlations reported in the literature exposes prediction issues because most of them are fitted using data at atmospheric conditions. A general correlation is raised between turbulent burning velocity (ST), laminar burning velocity (SL) and turbulence intensity (u’) proposed from the experimental data. This correlation has the form For sub-atmospheric and atmospheric conditions, the coefficients were determined

show abstract

Section: Theoretical Correlations To Determine the Turbulent Burning ...supporting

confidence: 53%

Section: Introductionmentioning

confidence: 99%

Experimental study of the correlation for turbulent burning velocity at subatmospheric pressure

2022

View full text Add to dashboard Cite

show abstract

“…At subatmospheric pressure, the relationship between the normalized burning velocity and normalized turbulent fluctuations was inverted because of the atmospheric condition. Cardona et al 16 studied syngas/methane/air flames at subatmospheric conditions. The equivalence ratios they evaluated correspond to lean combustion conditions: 0.8–1.0.…”

Section: Introductionmentioning

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%

“…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. Several groups of researchers have also implemented similar methodologies for other operating conditions and fuels, such as hydrogen–syngas mixtures ,,, and coal dust on premixed turbulent methane/air flames. ,, …”

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

Combustion of a hydrogen/carbon monoxide/carbon dioxide mixture in hot and diluted streams

Vargas

Valencia

Arrieta

et al. 2020

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

This work presents an experimental investigation on the combustion behavior of a mixture of hydrogen, carbon monoxide and carbon dioxide in hot and diluted streams, like those obtain under flameless combustion regimes. A jet in a hot coflow burner was used to carry out the experiments. This burner consists of a central fuel jet surrounded by a combustion products stream, which comes from a premixed flame under lean conditions. In this way, it is possible to obtain high temperature and low oxygen concentration in the jet flame. Here, a mixture of 40% H2, 40% CO and 20% CO was issued through the jet nozzle. This composition corresponds to a renewable fuel known as syngas. Three oxygen composition in the oxidant stream were evaluated: 2.0%, 4.7% and 6.9%. Temperature and species concentration values were measured along axial and radial lines under a fix Reynolds’s number. The results suggest that when oxygen concentration increases, CO and NO emissions of the total process decreases.

show abstract

Experimental study of turbulent syngas/methane/air flames at a sub-atmospheric condition

Cited by 3 publications

References 13 publications

Experimental study of the correlation for turbulent burning velocity at subatmospheric pressure

Experimental study of the correlation for turbulent burning velocity at subatmospheric pressure

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

Combustion of a hydrogen/carbon monoxide/carbon dioxide mixture in hot and diluted streams

Contact Info

Product

Resources

About