- Author
- Sivathanu, Y. R. | Kounalakis, M. E. | Faeth, G. M.
- Title
- Soot and Continuum Radiation Statistics of Luminous Turbulent Diffusion Flames.
- Coporate
- Michigan Univ., Ann Arbor
- Sponsor
- National Institute of Standards and Technology, Gaithersburg, MD
- Contract
- NIST-GRANT-60NANB8D0833
- Book or Conf
- Combustion Institute, Symposium (International) on Combustion, 23rd. July 22-27, 1990, Combustion Institute, Pittsburgh, PA, Orleans, France, 1543-1550 p., 1991
- Keywords
- combustion | soot | turbulent flames | diffusion flames | luminous flames | statistics | propylene
- Identifiers
- spectral radiation intensities
- Abstract
- The statistics of soot and spectral radiation intensities in the continuum were measured for horizontal radiation paths through the axis of highly-buoyant propylene flames burning in still air. Radiation statistics were also analyzed using a stochastic simulation of soot properties that matched soot statistics along the radiation path. Predictions and measurements of radiation statistics were generally in good agreement, aside from difficulties in predicting spikes of measured PDF's and temporal power spectra due to release of coherent structures near the source for low burner Reynolds numbers. Radiation fluctuation intensities up to 100 percent were obseved while temporal power spectra decayed proportional to the -5/3 power of frequency at high frequencies, suggesting strong turbulence/radiation interactions and a close relationship between turbulent mixing and continuum radiation statistics in turbulent flames.