Turbulent premixed flame propagation models for different combustion regimes

摘要: Conceptual models of turbulent premixed flame propagation speeds for the three combustion regimes have been proposed and tested by comparing to available well-defined data obtained on a variety experimental rigs. The model wrinkled regime has based Tennekes Kuo-Corrsin concept isotropic turbulence which proposes that dissipative eddies are most probably consist vortex tubes with diameter order Kolmogorow scale spacing Taylor length scale. Using this structure, it was shown normalized speed, ut/ul, is proportional square root intensity, u′/ul Reynolds number Kolmogorov Rn. In intermediate regime, assuming effective front surface area grows exponentially ut/ul. linearly dependent Rν u′/ul. distributed reaction zones starting Damkohler's formulation, dimensionless numbers contributing selected, found ut/u′ 3/4th power ul/u′. Comparison predictions from rigs shows excellent agreement despite uncertainties involved in measurement parameters velocities.