Temperature measurements in flames using rotational Raman scattering

Thesis/Dissertation · Mon Dec 31 23:00:00 EST 1979

OSTI ID:6233561

Samyal, B S

The purpose of this dissertation is to examine rotational Raman scattering as a probe of temperature and concentration in flames. The rotational intensities for temperature determination are measured by both analog and computer-controlled experiments. In the latter case, a computer is used to advance the spectrometer in the lines of interest and to retrieve data via a counter. Rotational temperatures, based on Raman scattering from N/sub 2/, is premixed H/sub 2/-air, H/sub 2//O/sub 2//N/sub 2/ and H/sub 2/-O/sub 2/ flames are determined In premixed Ch/sub 4/-air flames, temperatures are determined from the Raman scattering of both N/sub 2/ and O/sub 2/. The measurements are precise to within +- 3%. Radial and axial profiles of rotational temperature are presented. Corrections for rotational-vibrational interactions and for the effect of rotational transitions from vibrational excited molecules are included in the temperature calculations. It is concluded that rotational Raman scattering is potentially useful for nonperturbing, point measurements of temperature and concentration in flames at atmospheric pressure.

• OSTI ID: 6233561
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
080800 -- Hydrogen-- Properties & Composition
090110 -- Hydrocarbon Fuels-- Properties-- (1979-1989)
10 SYNTHETIC FUELS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
AIR
ALKANES
CHEMICAL REACTIONS
COMBUSTION
DISPERSIONS
ELEMENTS
FLAMES
FLUIDS
GASES
HYDROCARBONS
HYDROGEN
METHANE
MIXTURES
NITROGEN
NONMETALS
ORGANIC COMPOUNDS
OXIDATION
OXYGEN
RAMAN EFFECT
TEMPERATURE MEASUREMENT
THERMOCHEMICAL PROCESSES