Abstract
Abstract This paper deals with the investigation of laminar and turbulent flame front behaviour in the later stage of an confined explosion process where stretch effects can be neglected and for which experimental data of burning velocity and knowledge about the effect of flame-induced turbulence in a spherically propagating flame front are still limited. It could be shown that for laminar explosion experiments there exists a radius range of the propagating flame front in which the influence of stretch due to the overall spherical shape as well as compression of the unburnt gas can be neglected, so that the burning velocity S is mainly influenced by flame-induced acceleration. Also turbulent flame fronts are accelerated, obviously by additional flame-induced turbulence, and in this case the flame front propagation can be based on an effective turbulence intensity (u'/SL, p) eff resulting from the superposition of fan-generated (u'/SL, p) meas and flame-generated (u'/SL, p) ind turbulence intensity. Finall...
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