Measurements of the laminar burning velocity of hydrogen–air premixed flames

2010 ◽  
Vol 35 (4) ◽  
pp. 1812-1818 ◽  
Author(s):  
Jhon Pareja ◽  
Hugo J. Burbano ◽  
Yasuhiro Ogami
Keyword(s):  
Burning Velocity ◽  
Premixed Flames ◽  
Laminar Burning Velocity

Measurement of the laminar burning velocity and kinetics study of the importance of the hydrogen recovery mechanism of ammonia/hydrogen/air premixed flames

2022 ◽  
Vol 236 ◽  
pp. 111753
Author(s):  
Gabriel J. Gotama ◽  
Akihiro Hayakawa ◽  
Ekenechukwu C. Okafor ◽  
Ryuhei Kanoshima ◽  
Masao Hayashi ◽  
...  
Keyword(s):  
Burning Velocity ◽  
Premixed Flames ◽  
Kinetics Study ◽  
Laminar Burning Velocity ◽  
Hydrogen Recovery ◽  
Recovery Mechanism

Fundamental Combustion Characteristics of Lean and Stoichiometric Hydrogen Laminar Premixed Flames Diluted With Nitrogen or Carbon Dioxide

2016 ◽  
Vol 138 (11) ◽  
Author(s):  
Hong-Meng Li ◽  
Guo-Xiu Li ◽  
Zuo-Yu Sun ◽  
Zi-Hang Zhou ◽  
Yuan Li ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Equivalence Ratio ◽  
Burning Velocity ◽  
Flame Temperature ◽  
Premixed Flames ◽  
Combustion Characteristics ◽  
Inert Gas ◽  
Chemical Effect ◽  
Laminar Burning Velocity ◽  
Suppression Effect

In this work, the laminar combustion characteristics of H2/N2/air (H2/CO2/air) were systematically investigated under different hydrogen ratios (40–100%) and equivalence ratios (0.4–1.0) in a closed combustion vessel using the spherical expanding flame method associated with Schlieren technology. The unstretched laminar burning velocities were compared with data from previous study, and the result indicates that excellent agreements are obtained. Numerical simulations were also conducted using GRI3.0 and USC II mechanisms to compare with the present experimental results. The Markstein length for H2/inert gas can be decreased by decreasing the equivalence ratio and hydrogen ratio. The results indicate that the H2/inert gas premixed flames tend to be more unstable with the decrease of equivalence ratio and hydrogen ratio. For H2/N2 mixture, the suppression effect on laminar burning velocity is caused by modified specific heat of mixtures and decreased heat release, which result in a decreased flame temperature. For H2/CO2 mixture, the carbon dioxide has stronger dilution effect than nitrogen in reducing laminar burning velocity owing to both thermal effect and chemical effect.

scholarly journals Influence of Oxymethylene Ethers (OMEn) in Mixtures with a Diesel Surrogate

Energies ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7848
Author(s):  
Sandra Richter ◽  
Trupti Kathrotia ◽  
Marina Braun-Unkhoff ◽  
Clemens Naumann ◽  
Markus Köhler
Keyword(s):  
Chain Length ◽  
Burning Velocity ◽  
Premixed Flames ◽  
Laminar Burning Velocity ◽  
Different Types ◽  
Mass Fractions ◽  
First Time

Within this work the effects of blending oxymethylene ethers (OMEn) to a diesel surrogate (50 mol% n­dodecane, 30 mol% farnesane, and 20 mol% 1­methylnaphthalene) were investigated by performing two different types of experiments: measurements of the sooting propensity and of the laminar burning velocity, each in laminar premixed flames. For the sooting propensity, OME3, OME4, and OME5 were considered as blending compounds—each in mass fractions of 10%, 20%, and 30%. The sooting propensity was found to depend strongly on the OMEn blending grade but not on its chain length. In addition, the effect on the laminar burning velocity was studied for OME4 and the admixture of 30% OME4 with diesel surrogate for the first time. This admixture was found to lead to increased burning velocities; however, much less than might be foreseen when considering the respective values of the neat fuels.

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