A STUDY OF ONE-DIMENSIONAL LAMINAR PREMIXED FLAME ANNIHILATION

A simplified model for the mutual annihilation of two identical, oppos itely propagating premixed laminar flames is examined both numerically and analytically. The conservation equations are derived and their li mitations discussed. The various burning regimes are discussed with st rong emphasis on the final and most dramatic regime, the ''strong inte raction'' or ''homogeneous explosion'' stage. The influence of the Lew is number not equal to 1 on the flame behavior is discussed, specifica lly, the influence on the excess enthalpy, the flame speed, and annihi lation time. Conclusions are drawn that there is a great asymmetry bet ween annihilation for Lewis number greater than 1 and Lewis number les s than 1. (C) 1997 by The Combustion Institute.