Accession Number : ADA298455

Title :   Tomographic Analysis of CO Absorption in Low-Pressure Flame.

Descriptive Note : Final rept. 1 Mar-1 Nov 94,

Corporate Author : ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s) : McNesby, K. L. ; Daniel, R. G. ; Morris, J. B. ; Miziolek, A. W.

PDF Url : ADA298455

Report Date : JUN 1995

Pagination or Media Count : 34

Abstract : Tomographic analysis is used to provide a correction to low-pressure, burner stabilized, stoichiometric premixed CH4/O2 flame temperatures measured using tunable diode laser (TDL) absorption spectroscopy employing CO two-line thermometry. It is shown that flame temperatures measured using line-of-sight-based two-line thermometry are always too low, and that the correction to the observed temperature is a nonlinear function of the height above the burner surface. It is also shown that at a given height in the flame, a constant temperature across the flame does not imply that vibrational populations are constant, and that at low pressures (<20 torr), the flame spreads radially beyond the burner diameter so that it may no longer be approximated by a one-dimensional model without application of an area correction. jg p.3

Descriptors :   *LOW PRESSURE, *CARBON MONOXIDE, *TOMOGRAPHY, *ABSORPTION SPECTRA, STABILIZATION, DIODES, OPTICS, TEMPERATURE, VIBRATION, TUNABLE LASERS, MODELS, SPECTROSCOPY, ONE DIMENSIONAL, SEMICONDUCTOR LASERS, POPULATION, SURFACES, NONLINEAR ANALYSIS, FLAMES, SPECTROMETERS, BURNERS, THERMOMETERS.

Subject Categories : Inorganic Chemistry
      Physical Chemistry
      Test Facilities, Equipment and Methods
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE