Temperature measurements in a vapor axial deposition flame by spontaneous Raman spectroscopy

Journal Article · Wed Nov 15 00:00:00 EST 1989 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.343778· OSTI ID:5367155

Allendorf, M D ^[1]; Bautista, J R; Potkay, E ^[2]

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1. Combustion Research Facility, Sandia National Laboratories, Livermore, California 94551-0969 (USA)
2. AT T Bell Laboratories, 600 Mountain Avenue, Murray Hill, New Jersey 07974 (USA)

Spontaneous Raman spectra of oxygen and nitrogen have been used to determine temperatures in flames produced by a vapor axial deposition (VAD) burner, both with and without silicon tetrachloride added to form silica particles. VAD flames in the absence of silicon tetrachloride contain steep temperature gradients in both the axial and radial directions. The addition of silicon tetrachloride produces substantial changes in flame structure, as characterized by the movement of an axial thermal front to a location higher in the flame. This indicates that the effects of silicon tetrachloride upon flame properties cannot be neglected in computational models designed to predict silica deposition rates. These results also show that spontaneous Raman scattering measurements are feasible in silica-laden VAD flames and can yield insight into the structure of such flames. Because of the presence of large thermal gradients, the high spatial resolution obtained in these measurements (0.6 mm of the laser beam was imaged) represents the minimum required to obtain accurate measurements of temperature and species concentrations in these complex diffusion flames.

• OSTI ID: 5367155
• Journal Information: Journal of Applied Physics; (USA), Vol. 66:10; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
FLAMES
TEMPERATURE MEASUREMENT
GAS BURNERS
COMBUSTION PROPERTIES
DEPOSITION
NITROGEN
OXYGEN
RAMAN SPECTRA
SILICA
TEMPERATURE GRADIENTS
BURNERS
CHALCOGENIDES
ELEMENTS
MINERALS
NONMETALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
SILICON COMPOUNDS
SILICON OXIDES
SPECTRA
400800* - Combustion
Pyrolysis
& High-Temperature Chemistry