Laser rayleigh thermometry in turbulent flames

Robert Dibble*, R. E. Hollenbach

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

168 Scopus citations

Abstract

Non-intrusive, spatially and temporally resolved temperature measurements in turbulent flames, premixed and non-premixed, using laser Rayleigh scattering are reported. We demonstrate that 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.

Original languageEnglish (US)
Pages (from-to)1489-1499
Number of pages11
JournalSymposium (International) on Combustion
Volume18
Issue number1
DOIs
StatePublished - Jan 1 1981

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Mechanical Engineering
  • Physical and Theoretical Chemistry
  • Fluid Flow and Transfer Processes

Fingerprint

Dive into the research topics of 'Laser rayleigh thermometry in turbulent flames'. Together they form a unique fingerprint.

Cite this