Time resolved thermometry by simultaneous thermocouple and Rayleigh scattering measurements in a turbulent flame

Journal Article · Tue Jan 01 04:00:00 EST 1985 · Combust. Sci. Technol.; (United States)

DOI:https://doi.org/10.1080/00102208508960292· OSTI ID:5473800

Chandran, S B.S.; Komerath, N M; Grissom, W M; Jagoda, J I; Strahle,

This paper investigates the utility and accuracy of the use of fine-wire thermocouples for time resolved thermometry in turbulent flames. The problem, of course, is that there is no unique time constant in a turbulent flame with widely fluctuating temperature. An analytical formulation is presented which shows that while little error may be expected in determination of r.m.s. values of temperature, there may be a substantial error made in deduction of the mean temperature, under certain circumstances. Experimentally, in a premixed methane-air flame, a comparison is made of a time resolved compensated thermocouple measurement with a simultaneous measurement by molecular Rayleigh scattering, and the results compared with the theoretical predictions. The thermocouple, compensated through a single time constant, behaved admirably, under these conditions.

• Research Organization: School of Aerospace Engineering, Georgia Institute of Technology, Atlanta, GA 30332
• OSTI ID: 5473800
• Journal Information: Combust. Sci. Technol.; (United States), Journal Name: Combust. Sci. Technol.; (United States) Vol. 44:1; ISSN CBSTB
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
034000* -- Natural Gas-- Combustion
ACCURACY
AIR
ALKANES
CHEMICAL REACTION KINETICS
COHERENT SCATTERING
COMBUSTION KINETICS
ERRORS
FLAMES
FLUIDS
GASES
HYDROCARBONS
KINETICS
MEASURING INSTRUMENTS
METHANE
ORGANIC COMPOUNDS
RAYLEIGH SCATTERING
REACTION KINETICS
RESOLUTION
SCATTERING
TEMPERATURE MEASUREMENT
THERMOCOUPLES
TIME RESOLUTION
TIMING PROPERTIES
TURBULENCE