THEORY OF ATTACHED AND LIFTED DIFFUSION FLAMES

Diffusion flame (DF) attachment and liftoff are examined, leading to ( 1) explanations of the origins of previous, successful empirical corre lations; (2) the discovery of multiple lifting regimes. The latter inc ludes a very slow flow regime, a slow-to-moderate flow regime, and a m oderate-to-fast flow regime. Formulas for liftoff height ((l) over cap (g)) and characteristic flame tip breadth ((l) over cap(r)) are develo ped from a combination of the differential and integral form of the co nservation equations. These formulas are compared with numerical solut ions of the same equations. (C) 1998 American Institute of Physics. [S 1070-6631(98)02012-1].