Flame attachment and downstream heating effect of inclined line fires

Experiments were conducted to quantify downstream heating from inclined fires generated by a 25 cm wide, 5 deep gaseous line burner. A variety of orientation angles (?) and fire heat-release rates (HRR) employed simulating, at reduced scale, the dynamics two-dimensional (2-D) flame spread as found in wildland or building fires. The total heat flux q?f?(x) nearly-adiabatic surface ahead burner was measured water-cooled gage different locations (x). It that, with an increase HRR ?, increases. same is true for both projection length on (Lf,p) attachment (La). location divides into region (0?x?La) liftoff (La<x?Lf,p). scaling analysis performed correlate modified non-dimensional q?f*(x) normalized distance x/La these two regions piecewise power-law function. Lf,p scaled HRR, Q??*=Q?/(??cpT?(gcos?)1/2D3/2L), together angle between (?). La well represented derived quantities, L/Lf,0 Lf,p/Lf,0 (Lf,0 free height), based balance buoyancy force (upward) inertial due air entrainment (horizontal). quantitative comparison previous tests over PMMA samples demonstrates effectiveness proposed correlations predicting 2-D terrains.