Effect of flame retardants on side-wall quenching of partially premixed laminar flames

A combined experimental and numerical investigation of partially premixed laminar methane-air flames undergoing side-wall quenching (SWQ) is performed. well-established SWQ burner adapted to allow the seeding main flow with additional gaseous products issued from a (secondary) wall inlet close flame’s point. First, characteristics flame that quenches at are assessed using planar laser-induced fluorescence measurements OH radical, corresponding simulation fully-resolved transport chemistry conducted. boundary layer enriched mixture formed wall, leading reaction zone parallel for high injection rates inlet. Subsequently, in study, inflow mixed dimethylmethylphosphonat (DMMP), phosphor-based retardant. The DMMP addition allows assessment effects heat loss retardants on structure during flame-wall interaction. With an increasing amount injected mixture, stabilizes further away shows decrease local heat-release rate. Thereby, maximum flux significantly reduced. That results lower thermal load wall. analysis accumulation intermediate species HOPO similar CO without retardant addition. study how influenced by releases either fuel or insights gained canonical configuration can lead better understanding losses near-wall flames.