Correlations for the laminar burning velocity and burned gas Markstein length of methane-air mixtures diluted with flue gases at high temperatures and pressures

Duva, Berk Can; Wang, Yen Cheng; Chance, Lauren Elizabeth; Toulson, Elisa

doi:10.1016/j.fuel.2020.118721

Cited by 14 publications

(4 citation statements)

References 43 publications

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“…The results obtained in the present study shows again that by using the coefficients of the cubic law in the early stage of the explosion process, range well within the literature data, obtained experimentally for stoichiometric mixture is almost the same with the Su value obtained by Duva et al [29]. Besides the fact that the method does not imply physical and chemical properties of the fuel, the advantage is that the small vessel can be used for performing a greater number of experiments in a shorter time with a smaller quantity of flammable substances; hence, the experimental hazard in performing the physical experiments is lower.…”

Section: Influence Of Initial Pressure Initial Composition and Radioa...supporting

confidence: 93%

“…The procedures and limitations regarding the use of the whole pressure-time curves have been critically analyzed and discussed [25,26]. In the recent studies that used propagating spherical laminar flames monitored by optical methods only a short time after ignition, when the disturbances caused by the energy input at ignition, the flame curvature, and the varying flame thicknesses are small, were reported improved values for CH 4 -air mixtures burning velocities, corrected for flame stretch [27][28][29][30]. Other models used only p(t) measurements over longer periods, i.e., from ignition up to the inflection point p(t) records.…”

Section: Introductionmentioning

confidence: 99%

“…Duva et. al [29] measured the flame front radius (Rf), schlieren photography was employed for methane-air SEF at constant pressure in the Michigan State University constant volume combustion chamber, using CHEMKIN-PRO, the expansion ratio was numerically determined with the GRI-Mech 3.0 mechanism. The Rf data was obtained with a z-type Schlieren, and they found for the stoichiometric concentration a S u 47 cm/s for methane air mixtures.…”

Section: Introductionmentioning

confidence: 99%

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Experimental and Numerical Study of Ignition and Flame Propagation for Methane–Air Mixtures in Small Vessels

et al. 2021

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Methane is one of the most common gaseous fuels that also exist in nature as the main part of the natural gas, the flammable part of biogas or as part of the reaction products from biomass pyrolysis. In this respect, the biogas and biomass installations are always subjected to explosion hazards due to methane. Simple methods for evaluating the explosion hazards are of great importance, at least in the preliminary stage. The paper describes such a method based on an elementary analysis of the cubic law of pressure rise during the early stages of flame propagation in a symmetrical cylindrical vessel of small volume (0.17 L). The pressure–time curves for lean, stoichiometric and rich methane–air mixtures were recorded and analyzed. From the early stages of pressure–time history, when the pressure increase is equal to or less than the initial pressure, normal burning velocities were evaluated and discussed. Qualitative experiments were performed in the presence of a radioactive source of 60Co in order to highlight its influence over the explosivity parameters, such as minimum ignition energy, maximum rate of pressure rise, maximum explosion pressure and normal burning velocity. The results are in agreement with the literature data.

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Section: Influence Of Initial Pressure Initial Composition and Radioa...supporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Experimental and Numerical Study of Ignition and Flame Propagation for Methane–Air Mixtures in Small Vessels

et al. 2021

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“… To validate the present measurement system, the methane–air flame speed at 300 and 373 K were measured and compared with existing literature, − ,,,,− ,− as shown in Figure . Each data point was obtained by averaging the results of 24 schlieren images, and the error bars represent the scale of one standard deviation.…”

Section: Results and Discussionmentioning

confidence: 99%

Experimental Investigation of Lean Methane–Air Laminar Premixed Flames at Engine-Relevant Temperatures

Luo

Wang

et al. 2021

ACS Omega

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Lean premixed combustion is one of the most effective methods to constrain pollutant emissions for modern industrial gas turbines. An experimental study was performed on its propagation speed and internal structure at engine-relevant temperatures. A Bunsen burner was employed for the measurement with an optical schlieren system. The results show that the increase of preheating temperature dramatically accelerates the propagation of methane flames. The numerical results predicted by GRI-Mech 3.0, FFCM-1, and USC Mech II were also compared. The GRI-Mech 3.0 seems to overestimate the laminar flame speed at high operating conditions, while FFCM-1 underestimates the laminar flame speed compared to the present experimental data. The prediction by FFCM-1 shows good agreement with the overall existing data. The USC Mech II seems to overestimate the laminar flame speed at fuel-lean conditions while shows good agreement with present experimental measurements at stoichiometric conditions when the inlet temperature increases. It is also indicated that the flame is thinned at high-temperature conditions and the importance of CO production to the propagation speed increases. Finally, based on the experimental data, an empirical correlation of the laminar flame speed was developed in the range of T u = 300–800 K and ϕ = 0.7–1.0, the maximum deviation of which was less than 8%. The results of this study may contribute to the optimization of advanced gas turbine combustors.

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Effect of Oxygen-Rich Combustion on Flame Propagation of Syngas in a Half-Open Pipe at Elevated Temperatures

Li,

Deng,

et al. 2024

J. Therm. Sci.

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Correlations for the laminar burning velocity and burned gas Markstein length of methane-air mixtures diluted with flue gases at high temperatures and pressures

Cited by 14 publications

References 43 publications

Experimental and Numerical Study of Ignition and Flame Propagation for Methane–Air Mixtures in Small Vessels

Experimental and Numerical Study of Ignition and Flame Propagation for Methane–Air Mixtures in Small Vessels

Experimental Investigation of Lean Methane–Air Laminar Premixed Flames at Engine-Relevant Temperatures

Effect of Oxygen-Rich Combustion on Flame Propagation of Syngas in a Half-Open Pipe at Elevated Temperatures

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