Journal ArticleDOI
Thermal and Chemical Effects of Water Addition on Laminar Burning Velocity of Syngas
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TLDR
In this paper, an experimental and numerical study on thermal and chemical effects of water vapor addition on the laminar burning velocities of syngas was conducted using a constant-volume chamber and CHEMKIN package.Abstract:
An experimental and numerical study on thermal and chemical effects of water vapor addition on the laminar burning velocities of syngas was conducted using a constant-volume chamber and CHEMKIN package. The experimental conditions in the present study for CO/H2/air/H2O mixtures with hydrogen fraction in syngas were from 5% to 50%, initial temperature of 373 K, pressures of 0.1 and 0.5 MPa and water dilution ratios from 0% to 30%. The measured laminar burning velocity data were compared with simulations with three mechanisms, the San Diego mechanism and those of Davis et al. and Li et al. The experimental data showed a reasonable agreement with the calculated values at low and high pressures when the content of H2 in the fuel was low. However, when H2/CO ratio in the fuel was higher (75/25 and 95/05), all three mechanisms overpredicated the laminar burning velocity for fuel-rich mixtures. Sensitivity analysis was performed to identify the possible sources of discrepancy between the experimental data and ca...read more
Citations
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Journal ArticleDOI
Pressure history in the explosion of moist syngas/air mixtures
TL;DR: In this article, the effects of the equivalence ratio, initial temperature, CO/H 2 ratio, and dilution ratio on the explosion parameters were examined, and the heat loss during the combustion process was calculated by the difference between experimental and adiabatic explosion pressure.
Journal ArticleDOI
Effect of water injection on the knock, combustion, and emissions of a direct injection gasoline engine
Aqian Li,Zhaolei Zheng,Tao Peng +2 more
TL;DR: In this article, a numerical simulation method was used to study the feasibility of in-cylinder direct water injection technology to weaken the knock tendency of a turbocharged direct injection gasoline (GDI) engine and improve its combustion emission performance.
Journal ArticleDOI
Effects of oxygen enrichment on laminar burning velocities and Markstein lengths of CH4/O2/N2 flames at elevated pressures
TL;DR: In this paper, the laminar burning velocities and Markstein lengths of CH4/O2/N2 mixtures were measured in a constant volume combustion chamber over a wide range of O2 contents and equivalence ratios at elevated pressures.
Journal ArticleDOI
Explosion behavior predictions of syngas/air mixtures with dilutions at elevated pressures: Explosion and intrinsic flame instability parameters
TL;DR: In this article, the authors investigated the explosion processes of H2/CO/air mixtures with diluents with a confined vessel and obtained explosion pressure and maximum rate of pressure rise with increasing equivalence ratios.
Journal ArticleDOI
Dissociative influence of H2O vapour/spray on lean blowoff and NOx reduction for heavily carbonaceous syngas swirling flames
Daniel Pugh,Philip John Bowen,Richard Marsh,Andrew Philip Crayford,Jon Runyon,Steven Morris,Agustin Valera-Medina,Anthony Giles +7 more
TL;DR: In this paper, the potential benefits of these subtle changes in water loading and hence reaction pathways are explored in terms of delayed lean blowoff, and primary emission reduction in a premixed turbulent swirling flame.
References
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Evaluated kinetic data for combustion modelling supplement I
Donald L. Baulch,Carlos J. Cobos,Richard A. Cox,P. Frank,Garry Hayman,Th. Just,J. A. Kerr,T. Murrells,M. A. Pilling,Jürgen Troe,Raymond W. Walker,J. Warnatz +11 more
TL;DR: In this article, a compilation of kinetic data on elementary, homogeneous, gas phase reactions of neutral species involved in combustion systems has been presented under the auspices of the European Community Energy Research and Development Program.
Journal ArticleDOI
Evaluated Kinetic Data for Combustion Modeling: Supplement II
Donald L. Baulch,Craig T. Bowman,Carlos J. Cobos,R. A. Cox,Th. Just,J. A. Kerr,Michael J. Pilling,D. Stocker,J. Troe,Wing Tsang,Raymond W. Walker,J. Warnatz +11 more
TL;DR: In this paper, a compilation of kinetic data on elementary, homogeneous, gas phase reactions of neutral species involved in combustion systems has been presented under the auspices of the European Community Energy Research and Development Program.
A fortran computer code package for the evaluation of gas-phase, multicomponent transport properties
TL;DR: This report documents a Fortran computer code package that is used for the evaluation of gas-phase multicomponent viscosities, thermal conductivities, diffusion coefficients, and thermal diffusion coefficients.
Journal ArticleDOI
Laminar burning velocity and Markstein lengths of methane–air mixtures
TL;DR: In this article, the effect of temperature on the mass burning rate of a spherically expanding flame propagating at constant pressure and the effect by the associated Markstein lengths was investigated.
Journal ArticleDOI
A comprehensive kinetic mechanism for CO, CH2O, and CH3OH combustion
TL;DR: In this paper, a new experimental profile of stable species concentrations is reported for formaldehyde oxidation in a variable pressure flow reactor at initial temperatures of 850-950 K and at constant pressures ranging from 1.5 to 6.0 atm.