Nitric Oxide Formation in Flat Coal Dust/air Flames PDF Download
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Author: Shih-Lin Chen
Publisher:
ISBN:
Category : Air
Languages : en
Pages : 132
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Book Description
Author: Shih-Lin Chen
Publisher:
ISBN:
Category : Air
Languages : en
Pages : 132
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Book Description
Author: University of Kentucky. College of Engineering
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Martin Hertzberg
Publisher:
ISBN:
Category : Aluminum
Languages : en
Pages : 590
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Book Description
Author: David Walter Pershing
Publisher:
ISBN:
Category : Coal, Pulverized
Languages : en
Pages : 393
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Book Description
Author: Oak Ridge National Laboratory
Publisher:
ISBN:
Category : Fuel
Languages : en
Pages : 1430
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Author: National Aeronautics and Space Adm Nasa
Publisher: Independently Published
ISBN: 9781792941610
Category :
Languages : en
Pages : 32
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Book Description
An experimental and analytical study was performed on a lean, premixed-prevaporized Jet A/air flame tube. The NO(x) emissions were measured in a flame tube apparatus at inlet temperatures ranging from 755 to 866 K (900 to 1100 F), pressures from 10 to 15 atm, and equivalence ratios from 0.37 to 0.62. The data were then used in regressing an equation to predict the NO(x) production levels in combustors of similar design. Through an evaluation of parameters it was found that NO(x) is dependent on adiabatic flame temperature and combustion residence time, yet independent of pressure and inlet air temperature for the range of conditions studied. This equation was then applied to experimental data that were obtained from the literature, and a good correlation was achieved. Lee, Chi-Ming and Bianco, Jean and Deur, John M. and Ghorashi, Bahman Glenn Research Center NASA-TM-105722, E-7121, NAS 1.15:105722 RTOP 537-01-11...
Author: Richard Leslie Gay
Publisher:
ISBN:
Category : Combustion
Languages : en
Pages : 254
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Book Description
Author: Oak Ridge National Laboratory
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 1462
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Author: J. Zhao
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781721932672
Category :
Languages : en
Pages : 286
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Book Description
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
