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Proceedings Paper

Detailed chemistry of NH3/N2O/Ar flames by mass spectrometry, laser-induced fluorescence, and modeling
Author(s): Rosario C. Sausa; Demetris T. Venizelos
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Paper Abstract

Experimental and chemical modeling studies of a 60-Torr Nh3/N2O/Ar::1.03/1.59/0.54 flame are performed in order to provide further testing and refinements of a detailed chemical mechanisms developed previously in our laboratory. This mechanism consists of 87 reactions and 20 species and is denoted VS. Flame temperatures are measured with a coated, thin-wire thermocouple and by OH and NH by laser- induced fluorescence (LIF). Species concentration profile of NH3, N2O, N2, NO, O2, NH and OH are recorded using molecular beam pass spectrometry and/or LIF. The experimental species mole fractions are then compared to PREMIX laminar flame code calculations, which use the measured temperature profile and one of two detailed N/O/H chemical mechanisms, VS or VS-modified, as input. The PREMIX calculations using the VS mechanism predict very well the shapes of the experimental NH3, N2O, N2 H2O, NO, OH and NH profiles throughout the flame. They overpredict, however, the O2/Ar mole fraction ratio at 16.25 mm by 61 percent. Sensitivity analyses suggest refinements to the VS mechanisms. These refinements, along with rate analyses of the PREMIX results, are presented and discussed.

Paper Details

Date Published: 22 January 1999
PDF: 9 pages
Proc. SPIE 3535, Advanced Sensors and Monitors for Process Industries and the Environment, (22 January 1999); doi: 10.1117/12.337469
Show Author Affiliations
Rosario C. Sausa, U.S. Army Research Lab. (United States)
Demetris T. Venizelos, John Zink Co. (United States)


Published in SPIE Proceedings Vol. 3535:
Advanced Sensors and Monitors for Process Industries and the Environment
Wim A. de Groot, Editor(s)

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