It is also observed that the heat release helps the flame sustain much larger jet velocities than expected, with blow-out occurring for higher Re than predicted by cold flow theory.
The comparison between Fig. 11 and 12 indicates that the discrepancy between the analytical predictions of liftoff heights and those calculated by DNS increases with the amount of heat release, for the two levels of approximations that neglect heat release (I and II of Table1)
The introduction of heat release effects into the flame base velocity (U FbIII, Eq. 7) modifies the prediction of lift-off heights.