Heat Transfer From Flames Impinging on Flat and Cylindrical Surfaces

An experimental investigation was made to determine the heat-transfer distribution obtained when a flame impinges on flat and cylindrical surfaces. The combustion systems studied were oxygen-hydrogen, oxygen-propane, oxygen-acetylene, and air-methane with combustion stream velocities varying from 1 ft/sec to 4600 ft/sec. Data taken with cylindrical heat-transfer surfaces are consistent with available heat-transfer correlation for low temperature gases provided the effect of chemical reaction on the thermal conductivity for flame temperatures above 3500 deg R is taken into consideration. Data taken with flat heat-transfer surfaces can be correlated quite well in a generalized curve partially based on theoretical reasoning.