Journal ArticleDOI
Shock-tube study of the hydrogen-oxygen reaction
T. Asaba,W.C. Gardiner,R.F. Stubbeman +2 more
- Vol. 10, Iss: 1, pp 295-302
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TLDR
In this article, the authors investigated the effect of slow vibrational relaxation of O 2 on the hydrogen-oxygen ignition kinetics, and showed that in normal studies of normal studies, no effect was observed.Abstract:
The hydrogen-oxygen reaction was investigated using OH absorption and emission measurements of induction times over the temperature range of 1400°–2500°K. The dependence of induction time on composition was studied to measure the relative influence of hydrogen and oxygen concentrations in determining the induction times. Comparison of experimental measurements with computed values obtained from an analytic solution to the rate equations, which is presented in detail, showed that the results could be understood in terms of rate-coefficient parameters which are in agreement with previous studies. The effect of slow vibrational relaxation of O 2 was investigated under conditions where the vibrational relaxation times were comparable to the induction times. The results indicated that in normal studies of hydrogen-oxygen ignition kinetics no effect of slow vibrational relaxation will be observed.read more
Citations
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Journal ArticleDOI
A comprehensive modeling study of hydrogen oxidation
TL;DR: A detailed kinetic mechanism has been developed to simulate the combustion of H2/O2 mixtures, over a wide range of temperatures, pressures, and equivalence ratios as discussed by the authors.
Journal ArticleDOI
Detailed chemical kinetic models for the combustion of hydrocarbon fuels
TL;DR: The status of detailed chemical kinetic models for the intermediate to high-temperature oxidation, ignition, combustion of hydrocarbons is reviewed in conjunction with the experiments that validate them in this paper.
Journal ArticleDOI
Remaining uncertainties in the kinetic mechanism of hydrogen combustion
TL;DR: In this article, an analysis of the performance of an updated hydrogen combustion mechanism is presented, with particular attention paid to different channels of reaction between H atoms and HO2 radicals, to pressure dependence of the recombination of HO 2 radicals, and to the anomalous rate constant.
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Methane/propane oxidation at high pressures: Experimental and detailed chemical kinetic modeling
Eric L. Petersen,Danielle M. Kalitan,Stefanie L. Simmons,Gilles Bourque,Henry J. Curran,John M. Simmie +5 more
TL;DR: In this article, the ignition and oxidation kinetics of various methane-propane fuel blends at gas turbine pressures were investigated. But none of the prior data for CH4/C3H8 prior data existed.
Journal ArticleDOI
An optimized kinetics model for OH chemiluminescence at high temperatures and atmospheric pressures
Joel M. Hall,Eric L. Petersen +1 more
TL;DR: In this article, a kinetics model has been assembled and optimized to predict the formation and quenching of the electronically excited state (OH*) at combustion conditions, and sensitivity analyses were performed to identify experimental conditions under which the shape of the measured OH* profiles and the magnitude of the emission would be sensitive to the formation reactions.
References
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Journal ArticleDOI
Systematics of Vibrational Relaxation
TL;DR: In this article, a large number of data points for the vibrational relaxation time (pτv in atm sec) of simple systems have been logarithmically plotted vs (T°K)-⅓.
Journal ArticleDOI
Kinetic Studies of Hydroxyl Radicals in Shock Waves. II. Induction Times in the Hydrogen-Oxygen Reaction
G. L. Schott,J. L. Kinsey +1 more
TL;DR: In this paper, the formation of OH in the shock wave induced combustion of H2 and O2 has been measured by oscillographically recording the absorption of ultraviolet OH line radiation, and the main features of the reaction course are: (1) an induction period whose length, ti, varies inversely with [O2], (2) an increase in the product [O 2] ti as ti becomes short compared to the vibrational relaxation time of O2, and (3) at the end of the induction period, a sigmoid rise of [OH] to a
Journal ArticleDOI
Kinetic Studies of Hydroxyl Radicals in Shock Waves. III. The OH Concentration Maximum in the Hydrogen‐Oxygen Reaction
TL;DR: In this paper, the chemical reaction zone in shock waves in H2-O2-Ar mixtures has been studied in detail using an ultraviolet line absorption technique to measure the OH radical concentration.
Journal ArticleDOI
Calculation of Reaction Profiles behind Steady-State Shock Waves. I. Application to Detonation Waves
TL;DR: In this article, a numerical procedure for the integration of an arbitrary system of kinetic equations subject to the constraints imposed by steady state shock hydrodynamics is described, and the detonation profile has been calculated for a 2H2+O2+Xe mixture at an initial pressure of 30 mm Hg.
Journal ArticleDOI
Vibrational Relaxation of Oxygen
TL;DR: In this paper, the vibrational relaxation of oxygen has been studied by shock tube interferometry from 600° to 2600°K with the result that at 1 atm pressure the relaxation time τv in seconds is found to be τv=1.49×10-10 exp (133T-½).
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