Laser Rayleigh thermometry in turbulent flames

Conference · Thu Jan 01 04:00:00 EST 1981

OSTI ID:6874877

Dibble, R W; Hollenbach, R E

Nonintrusive, spatially and temporally resolved temperature measurements in turbulent flames, premixed and non-premixed, using laser Rayleigh scattering are reported. Through judicious design of experiments, laser Rayleigh scattering can be used to measure temperature (or concentration) at a data rate, and hence frequency response, DC-15 kHz, that is undemonstrated by any other present day laser based technique. Two demonstrations of laser Rayleigh thermometry are described: a turbulent premixed flame, and a turbulent jet diffusion flame. The turbulent jet diffusion flame uses a novel mixture of hydrogen and methane as fuel. This fuel mixture permitted the first laser Rayleigh thermometry in turbulent non-premixed flames. In these demonstrations, the Rayleigh scattered light intensity from a CW laser is used to produce a time series of temperature. From that time series, the temperature probability distribution function is generated as well as the power spectrum and autocorrelation. From the probability distribution function, the mean, variance and higher moments are easily generated.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6874877
• Report Number(s): SAND-80-8623; CONF-800809-7
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
42 ENGINEERING
421000 -- Engineering-- Combustion Systems
ALKANES
BINARY MIXTURES
COHERENT SCATTERING
DISPERSIONS
ELECTROMAGNETIC RADIATION
ELEMENTS
FLAMES
HYDROCARBONS
HYDROGEN
LASER RADIATION
MEASURING INSTRUMENTS
METHANE
MIXTURES
NONMETALS
ORGANIC COMPOUNDS
RADIATIONS
RAYLEIGH SCATTERING
SCATTERING
TEMPERATURE MEASUREMENT
THERMOMETERS
TURBULENCE