Heat Transfer from Flame Impingement Normal to a Plane Surface : 9783639164466 : 09 Jun 2009 : Impinging flame jets have been widely studied because of their importance in a range of applications such as materials processing and fire safety. The purpose here was to determine the importance of radiation, convection, and thermochemical heat release (TCHR) under a range of conditions. Natural gas was premixed with oxidants ranging from air to pure oxygen in a round burner that produced uniform exit conditions. Flames impinged perpendicular to a water-cooled flat disk segmented into 6 concentric calorimeteric sections to measure radial heat flux distribution. Many parameters were varied such as firing rate, burner-to-disk spacing, oxidant composition and disk surface treatment. Untreated, polished, blackened, alumina-coated and platinum-coated disk surfaces made of stainless steel, copper or brass were tested. High (blackened) vs. low (polished) emissivity surfaces showed nonluminous gaseo