Heat Transfer from Impinging Flame Jets

摘要

The influence of turbulence on heat transfer and on the nonuniformity of the heat flux distribution to an object in a furnace was studied. Heat transfer from a premixed flame jet impinging perpendicularly on a flat plate was examined. The flow structure and heat transfer of impinging flame jets as well as impinging isothermal jets from two rapid heating burners were measured. Static pressure in the stagnation region was measured to find the radial velocity gradient just outside the boundary layer in the vicinity of the stagnation point. Using a numerical model impinging isothermal jets were simulated. It is shown that from isothermal measurements and from measurements of the radial velocity gradient near the stagnation point that a first approximation of the heat transfer from impinging premixed flame jets can be made.