A general semicausal stochastic model for turbulence/radiation interactions in flames

Book · Fri Nov 01 04:00:00 EST 1996

OSTI ID:395263

Chan, S H; Pan, X C ^[1]

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1. Univ. of Wisconsin, Milwaukee, WI (United States). Dept. of Mechanical Engineering

This paper presents a general two-dimensional non-stationary semicausal model for the simulation of mixture fraction, which has greatly improved the function of the previous causal model. The proposed model includes not only the pre-correlation predictors both in time space and geometric space as well as the cross-correlation predictors, but also post-correlation predictors. The latter makes possible the consideration of interaction of a scalar, such as mixture fraction, at a physical location with that of all its adjacent locations. It has also been shown that the complicated second- and higher-order correlation predictors can be neglected in the semicausal simulation of mixture fraction. To show the validity of the model, the stochastical mean and variance of the spectral intensities at different wavelengths were predicted and compared with the detailed experimental data of turbulent carbon monoxide/hydrogen/air diffusion flames with different Reynolds numbers. These comparisons showed excellent agreement with existing data and a significant improvement over the prior causal model.

• OSTI ID: 395263
• Report Number(s): CONF-960815--; ISBN 0-7918-1507-2
• Country of Publication: United States
• Language: English

Related Subjects

10 SYNTHETIC FUELS
AIR
CARBON MONOXIDE
COMBUSTION KINETICS
HYDROGEN
MATHEMATICAL MODELS
RADIANT HEAT TRANSFER
STOCHASTIC PROCESSES
SYNTHESIS GAS
SYNTHETIC FUELS
THEORETICAL DATA