Measurement of laminar burning velocities and analysis of flame stabilities for hydrogen-air-diluent premixed mixtures

Hu, Erjiang; Huang, Zuohua; He, Jiajia; Jin, Chun; Miao, Haiyan; Wang, XiBin

doi:10.1007/s11434-008-0584-y

Cited by 22 publications

(7 citation statements)

References 31 publications

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“…Lewis number (Le) is used to represent the thermal-diffusional instability. The hydrodynamic instability is enhanced when the thermal expansion ratio (s), defined as the ratio of unburned gas to burned gas at two sides of flame front, is increased and the flame thickness (d l ) is decreased [23,24]. Lewis number, thermal expansion ratio and flame thickness with different hydrogen fractions and pressures at f ¼ 0.8 as shown on the right side of Fig.…”

Section: 2mentioning

confidence: 95%

Experimental and numerical study on the effect of composition on laminar burning velocities of H2/CO/N2/CO2/air mixtures

Pan

et al. 2012

International Journal of Hydrogen Energy

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Section: 2mentioning

confidence: 95%

Experimental and numerical study on the effect of composition on laminar burning velocities of H2/CO/N2/CO2/air mixtures

Pan

et al. 2012

International Journal of Hydrogen Energy

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“…25,26 Here, a brief description is given. The constant volume chamber is cylindrical, with an inner diameter of 180 mm.…”

Section: Experimental and Numerical Specificationsmentioning

confidence: 99%

Effects of Hydrogen Addition on the Laminar Flame Speed and Markstein Length of Premixed Dimethyl Ether–Air Flames

Cheng

et al. 2015

Energy Fuels

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Laminar flame speeds of premixed dimethyl ether/hydrogen/air flames were measured in a constant volume bomb at different temperatures, equivalence ratios, and hydrogen blending ratios. Results reveal that laminar flame speeds increase with an increased hydrogen blending ratio and initial temperature. The Wang model and Zhao model both perform well in predicting laminar flame speeds of the blends. Furthermore, three different models for an effective Lewis number are validated, and the volume-fraction-weighted model performs well in predicting the Markstein length. The effects of hydrogen addition on the flame speed and Markstein length of fuel blends are systematically studied. The chemical kinetic effect induced by hydrogen addition plays a dominant role in increasing the laminar flame speed in comparison to thermal and diffusive effects. In addition, there exists a critical equivalence ratio in the trend of the Markstein length. At the equivalence ratio less than the critical equivalence ratio, the Markstein length decreases with increased hydrogen fraction, indicating that the addition of hydrogen enhances the diffusional thermal instability of the blends. While at the equivalence ratio larger than the critical equivalence ratio, the Markstein length increases with the increase of the hydrogen mole fraction. Finally, the combined parameter [Ze(Le −1)] can reflect the trend of L b , which varies with the hydrogen blending ratio.

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“…An accurate knowledge of the rate constant for reaction is important in interpreting laminar flame speed measurements of H 2 –O 2 mixtures. Figure presents the unstretched laminar flame speed measurements of H 2 –air mixtures as a function of the equivalence ratio at standard initial temperature (298 K) and ambient pressure (1 atm) , along with the simulations from the preliminary CEFRC (Combustion Energy Frontier Research Center) foundational fuel model . Note that the previous rate constant measurements of reaction have a relatively large scatter (within a factor of 2) at elevated temperatures, and such large uncertainty in reaction can affect the laminar flame speed predictions of H 2 –air mixtures from the model by approximately ±11%, as demonstrated in Fig.…”

Section: Introductionmentioning

confidence: 99%

A Shock Tube Study of H₂ + OH → H₂O + H Using OH Laser Absorption

Lam

Davidson

Hanson

2013

Int J of Chemical Kinetics

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The rate constant for the reaction of hydroxyl radicals (OH) with molecular hydrogen (H2) was measured behind reflected shock waves using UV laser absorption of OH radicals near 306.69 nm. Test gas mixtures of H2 and tert‐butyl hydroperoxide (TBHP) diluted in argon were shock‐heated to temperatures ranging from 902 to 1518 K at pressures of 1.15–1.52 atm. OH radicals were produced by rapid thermal decomposition of TBHP at high temperatures. The rate constant for the title reaction was inferred by best fitting the measured OH time histories with the simulated profiles from the comprehensive reaction mechanism of Wang et al. (USC‐Mech v2.0) (2007). The measured values can be expressed in the Arrhenius equation as k1(T) = 4.38 × 1013 exp(–3518/T) cm3 mol−1 s−1 over the temperature range studied. A detailed error analysis was performed to estimate the overall uncertainty of the title reaction, and the estimated (2 – σ) uncertainties were found to be ±17% at 972 and 1228 K. The present measurements are in excellent agreement with the previous experimental studies from Frank and Just (Ber Bunsen‐Ges Phys Chem 1985, 89, 181–187), Michael and Sutherland (J Phys Chem 1988, 92, 3853–3857), Davidson et al. (Symp (Int) Combust 1988, 22, 1877–1885), Oldenborg et al. (J Phys Chem 1992, 96, 8426–8430), and Krasnoperov and Michael (J Phys Chem A 2004, 108, 5643–5648).In addition, the measured rate constant is in close accord with the non‐Arrhenius expression from GRI‐Mech 3.0 (http://www.me.berkeley.edu/gri_mech/) and the theoretical calculation using semiclassical transition state theory from Nguyen et al. (Chem Phys Lett 2010, 499, 9–15).

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Measurement of laminar burning velocities and analysis of flame stabilities for hydrogen-air-diluent premixed mixtures

Cited by 22 publications

References 31 publications

Experimental and numerical study on the effect of composition on laminar burning velocities of H2/CO/N2/CO2/air mixtures

Experimental and numerical study on the effect of composition on laminar burning velocities of H2/CO/N2/CO2/air mixtures

Effects of Hydrogen Addition on the Laminar Flame Speed and Markstein Length of Premixed Dimethyl Ether–Air Flames

A Shock Tube Study of H₂ + OH → H₂O + H Using OH Laser Absorption

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Measurement of laminar burning velocities and analysis of flame stabilities for hydrogen-air-diluent premixed mixtures

Cited by 22 publications

References 31 publications

Experimental and numerical study on the effect of composition on laminar burning velocities of H2/CO/N2/CO2/air mixtures

Experimental and numerical study on the effect of composition on laminar burning velocities of H2/CO/N2/CO2/air mixtures

Effects of Hydrogen Addition on the Laminar Flame Speed and Markstein Length of Premixed Dimethyl Ether–Air Flames

A Shock Tube Study of H2 + OH → H2O + H Using OH Laser Absorption

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A Shock Tube Study of H₂ + OH → H₂O + H Using OH Laser Absorption