Abstract
Upstream interaction of a spherically premixed flame is investigated numerically in this work. According to the results of upstream interactions between two plane premixed flames in the previous paper, the burning rate for Le > 1 is accelerated during upstream interaction, whereas the burning rate is decelerated for Le < 1. Unlike the plane premixed flame, the dependence of burning rate on the flame stretch is involved for spherically premixed flames. The results reveal that the acceleration (Le > 1) and the deceleration (Le < 1) of burning rate are enhanced for upstream interactions of spherically premixed flames due to the influence of flame stretch.