Download or read book Experimental Study of Nitric Oxide Formation Kinetics written by Jamie Peter Monat and published by . This book was released on 1977 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Study of Nitric Oxide Hydorgen Reaction Kinetics written by Stanford University. High Temperature Gasdynamics Laboratory. High Temperature Gasdynamics Laboratory and published by . This book was released on 1976 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Study of Nitric Oxide hydrogen Reaction Kinetics written by William L. Flower and published by . This book was released on 1976 with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of an investigation of the decomposition kinetics of nitric oxide at high temperatures are presented. Mixtures of nitric oxide, molecular hydrogen, and inert gas (either argon or krypton) were heated by incident shock waves in a shock tube. The subsequent chemical reaction was monitored by using two high-speed infrared detectors to measure infrared emission from the 5.3-micron fundamental vibration-rotation band of NO and the 6.3-micron v2-band of water vapor. Each detection system was calibrated to determine the response to NO and to H2O, which permits the calculation of NO and H2O concentrations from the measured emission records. Post-shock temperatures ranged from 2400 K to 4200 K. The pressure behind the incident shock was between 0.25 and 0.62 atm in all tests. The nominal initial NO:H2 ratios of the test gases were 1:2, 1:1, and 2:1 with the inert diluent making up approximately 90% of the test gas for all experiments. A seventeen-reaction kinetic model of the reacting flow was used to calculate theoretical NO and H2O concentration histories. Kinetic calculations indicate the rate-limiting reaction for NO decomposition for the experimental conditions of this study is the reaciton of NO with atomic hydrogen, (1) NO + H [right arrow] N + OH. The chemical rate constant for reaction (1), k1, was determined for each experiment by optimizing the agreement between calculated and measured emission records for NO and H2O. A thorough sensitivity analysis confirmed that calculated NO and H2O records are more sensitive to small changes in K1 than to variations in the rate constants of the other sixteen reactions within the uncertainty limits of each. The rate constant for the reaction NO + N [right arrow] N + OH which best fits the data from 21 shock-tube experiments was found to be k1 = 2.22 x 1014 − 0.08 exp( -50.5/RT) cm3/mole-sec in the temperature range 2400 - 4200 K. These data provide useful information for modelling the decomposition of NO at high temperatures.
Download or read book Experimental and Analytical Study of Nitric Oxide Formation During Combustion of Propane in a Jet stirred Combustor written by N. T. Wakelyn and published by . This book was released on 1978 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Kinetics of Nitric Oxide Formation in High Pressure Combustion Processes written by Syed Mohammed Shahed and published by . This book was released on 1970 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Theoretical Study of Nitric Oxide Formation in Constant Pressure Combustion Processes written by Md. Munawer Rasheed Khan and published by . This book was released on 1972 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Kinetics of Nitric Oxide Formation Behind 3 to 4 KM S Shock Waves written by Charles E. Treanor and published by . This book was released on 1993 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: A previously published group of 02/N2 shock-tube experiments, wherein the time history of the NO 5 micrometers radiation was measured, has been studied to elicit information about the relevant chemical reactions which produce the radiation. It was found that the calculated radiation was sensitive to the rates used in the Zeldovich mechanism for NO formation, and that the rate measured by Monat et al. for N2 + 0 -- greater than NO + N produced important features of the observed radiation. Vibration-dissociation coupling in this reaction modifies the radiation history in an important way, and is an essential element in obtaining agreement with the experiment. To improve agreement over a range of 02/N2 mixtures, it was necessary to take into account the faster vibrational relaxation of N2 by 02 and 0 collisions and the subsequent effect on vibration-dissociation coupling ... Reaction rates, Vibration-dissociation coupling, Air chemistry, Nitric oxide radiation, Nitric oxide formation.
Download or read book Experimental and Analytical Study of Nitric Oxide Formation During Combustion of Propane in a Jet Stirred Combustor written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-20 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: A jet-stirred combustor, constructed of castable zirconia and with an Inconel injector, was used to study nitric oxide formation in propane-air combustion with residence times in the range from 3.2 to 3.3 msec and equivalence ratios varying from 0.7 to 1.4. Measurements were made of combustor operating temperature and of nitric oxide concentration. Maximum nitric oxide concentrations of the order of 55 ppm were found in the range of equivalence ratio from 1.0 to 1.1. A finite-rate chemical kinetic mechanism for propane combustion and nitric oxide formation was assembled by coupling an existing propane oxidation mechanism with the Zeldovich reactions and reactions of molecular nitrogen with hydrocarbon fragments. Analytical studies using this mechanism in a computer simulation of the experimental conditions revealed that the hydrocarbon-fragment-nitrogen reactions play a significant role in nitric oxide formation during fuel-rich combustion. Wakelyn, N. T. and Jachimowski, C. J. and Wilson, C. H. Langley Research Center NASA-TP-1181, L-12052 RTOP 505-03-23-01
Download or read book Applied Combustion Diagnostics written by Katharina Kohse-Hoinghaus and published by CRC Press. This book was released on 2002-04-26 with total page 734 pages. Available in PDF, EPUB and Kindle. Book excerpt: The editors have assembled a world-class group of contributors who address the questions the combustion diagnostic community faces. They are chemists who identify the species to be measured and the interfering substances that may be present; physicists, who push the limits of laser spectroscopy and laser devices and who conceive suitable measuremen
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1990 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Kinetic Models for Combustion of Hydrocarbons and Formation of Nitric Oxide written by and published by . This book was released on 1980 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Kinetic Models for Combustion of Hydrocarbons and Formation of Nitric Oxide written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-13 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: The formation of nitrogen oxides NOx during combustion of methane, propane, and a jet fuel, JP-4, was investigated in a jet stirred combustor. The results of the experiments were interpreted using reaction models in which the nitric oxide (NO) forming reactions were coupled to the appropriate hydrocarbon combustion reaction mechanisms. Comparison between the experimental data and the model predictions reveals that the CH + N2 reaction process has a significant effect on NO formation especially in stoichiometric and fuel rich mixtures. Reaction models were assembled that predicted nitric oxide levels that were in reasonable agreement with the jet stirred combustor data and with data obtained from a high pressure (5.9 atm (0.6 MPa)), prevaporized, premixed, flame tube type combustor. The results also suggested that the behavior of hydrocarbon mixtures, like JP-4, may not be significantly different from that of pure hydrocarbons. Application of the propane combustion and nitric oxide formation model to the analysis of NOx emission data reported for various aircraft gas turbines showed the contribution of the various nitric oxide forming processes to the total NOx formed. Jachimowski, C. J. and Wilson, C. H. Langley Research Center NASA-TP-1794, L-14106 RTOP 506-52-33-01...
Download or read book Experimental and Analytical Study of Nitric Odixe Formation During Combustion of Propane in a Jet stirred Combustor written by N. T. Wakelyn and published by . This book was released on 1978 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Kinetics of the Nitric Oxide Oxidation at Less Than Twenty Millimeters Pressure written by John Clement Treacy and published by . This book was released on 1953 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Kinetic Models for Combustion of Hydrocarbons and Formation of Nitric Oxide written by Casimir J. Jachimowski and published by . This book was released on 1980 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurements and Modeling of Nitric Oxide Formation in Counterflow Premixed Ch4 O2 N2 Flames written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-27 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laser-induced fluorescence (LIF) measurements of NO concentration in a variety of CH4/O2/N2 flames are used to evaluate the chemical kinetics of NO formation. The analysis begins with previous measurements in flat, laminar, premixed CH4/O2/N2 flames stabilized on a water-cooled McKenna burner at pressures ranging from 1 to 14.6 atm, equivalence ratios from 0.5 to 1.6, and volumetric nitrogen/oxygen dilution ratios of 2.2, 3.1 and 3.76. These measured results are compared to predictions to determine the capabilities and limitations of the comprehensive kinetic mechanism developed by the Gas Research Institute (GRI), version 2.11. The model is shown to predict well the qualitative trends of NO formation in lean-premixed flames, while quantitatively underpredicting NO concentration by 30-50%. For rich flames, the model is unable to even qualitatively match the experimental results. These flames were found to be limited by low temperatures and an inability to separate the flame from the burner surface. In response to these limitations, a counterflow burner was designed for use in opposed premixed flame studies. A new LIF calibration technique was developed and applied to obtain quantitative measurements of NO concentration in laminar, counterflow premixed, CH4/O2/N2 flames at pressures ranging from 1 to 5.1 atm, equivalence ratios of 0.6 to 1.5, and an N2/O2 dilution ratio of 3.76. The counterflow premixed flame measurements are combined with measurements in burner-stabilized premixed flames and counterflow diffusion flames to build a comprehensive database for analysis of the GRI kinetic mechanism. Pathways, quantitative reaction path and sensitivity analyses are applied to the GRI mechanism for these flame conditions. The prompt NO mechanism is found to severely underpredict the amount of NO formed in rich premixed and nitrogen-diluted diffusion flames. This underprediction is traced to uncertainties in the CH kinetics as well as in the nitrogen oxidation chemistry. S
Download or read book NASA Technical Note written by and published by . This book was released on 1975 with total page 722 pages. Available in PDF, EPUB and Kindle. Book excerpt:
