Cooling arrangement for a gas turbine blade, gas turbine blade, turbine and gas turbine engine equipped with the same

摘要

The air-cooled blade (10), having an inner cavity (12) with cooling fins (24) projecting from its wall (14), contains a jacket (26) with outlet holes (28) spaced at intervals that place them between the facing cooling fins, the thickness of which is no more than a third of the distance between fins. During operation the cooling air is fed into the blade jacket, passing through the outlet holes towards the fins in a cooling flow with a Reynolds number of less than 10000.