This paper presents the first flow visualisation for the previously published novel film cooling hole, the converging slot-hole or console. Published experimental results have demonstrated that the console improved both the heat transfer and aerodynamic performance of turbine vane and rotor blade cooling systems. Flow visualisation data for a row of consoles was compared with that of cylindrical and fan-shaped holes and a slot at the same inclination angle of 35° to the surface, on a large-scale, flat-plate model at engine representative Reynolds numbers in a low speed tunnel with ambient temperature mainstream flow. The data were collected using a fine nylon mesh covered with thermochromic liquid crystals, which allowed measurement of gas temperature in planes perpendicular to the flow. The data demonstrated that the console film was similar to a slot film, and remained thin and attached to the surface for coolant to mainstream momentum flux ratios of 1.1 to 40 and for a case with no crossflow (infinite momentum flux ratio).
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