At. Norris et Sb. Pope, MODELING OF EXTINCTION IN TURBULENT-DIFFUSION FLAMES BY THE VELOCITY-DISSIPATION-COMPOSITION PDF METHOD, Combustion and flame, 100(1-2), 1995, pp. 211-220
The velocity-dissipation-composition probability density function (pdf
) method is used to model a turbulent CO/H-2/N-2-air-piloted jet diffu
sion flame in the regime of extinction. The thermochemistry is modeled
by a three-scalar simplified formulation obtained by the intrinsic lo
w-dimensional manifold (ILDM) method. Calculations are performed for f
ive different jet velocities, and the scalar pdfs are compared with ex
perimental data. Overall good agreement is obtained between the calcul
ations and the experimental results, with the only significant differe
nce being the high level of scatter in the experimental data compared
with the pdf results: reasons for this difference are discussed. The p
df method is found to predict flame extinction at approximately the sa
me jet velocity as that of the experiment. A small amount of local ext
inction is observed in the pdf results for the high-jet-velocity cases
.