Laser measurements and stochastic simulations of turbulent reacting flows

Selected topics related to the modeling and measurement of turbulent reacting flows are reviewed, with emphasis on techniques which currently hold considerable promise for providing increased understanding of the fundamental aspects of turbulent combustion. Moment, probability density function, and vortex dynamics approaches to the stochastic simulation of turbulent reacting flows are included. Measurement techniques discussed are centered around laser-scattering diagnostics and include Rayleigh and spontaneous Raman scattering for temperature, density, and species concentration measurement, and laser velocimetry for velocity measurement. The simultaneous measurement of velocity and scalar quantities and their resulting correlations are discussed. Model calculations of a turbulent diffusion flame and a chemically-reacting shear layer are made and compared with measurements.