CHARACTERISTICS OF CONVECTIVE HEAT TRANSFER IN NONISOTHERMAL, VARIABLE-DENSITY IMPINGING JETS

Convective heat transfer is experimentally studied in the impingement region where a free jet of high-temperature burned gas impinges normally on a circular flat plate cooled from the back. Taking into account the effect of jet-to-ambient fluid density ratio on the jet development, a generalized, design-oriented model is proposed, which permits local prediction of the wall heat-fluxes over a wide range of the initial density ratio.