ROTOR BLADE COOLING FLOW

摘要

A rotor blade includes and airfoil. The airfoil includes pressure and suction side walls which extend radially outwardly from a platform in span from a root to a tip and between a leading edge and a trialing edge. The tip includes a tip floor, a plurality of coolant outlets and a tip rail having a pressure side and suction side portions that extend radially outwardly from the tip floor. Cooling passages are circumscribed within the airfoil and are in fluid communication with one or more of the coolant outlets. A baffle extends radially outwardly from and transversely across the tip floor from the pressure side portion to the suction side portion to define first and second tip pockets. A slot is disposed along the suction side portion of the tip rail to provide for fluid communication out of one of the first or second tip pockets, thereby reducing pressure within the corresponding tip pocket.

主权项

1. A rotor blade, comprising:
an airfoil including pressure and suction side walls which extend radially outwardly from a platform in span from a root to a tip and in chord between a leading edge and a trialing edge, the tip including a tip floor and a plurality of coolant outlets disposed along the tip floor, the tip further including a tip rail that extends radially outwardly from the tip floor, the tip rail having a pressure side portion and a suction side portion which are joined at the leading and trailing edges; a plurality of cooling passages circumscribed within the airfoil for routing a coolant therethrough, each of the cooling passages being in fluid communication with one or more of the coolant outlets; a baffle extending radially outwardly from and across the tip floor from the pressure side portion to the suction side portion to define a first tip pocket and a second tip pocket; and a slot disposed along the suction side portion of the tip rail, wherein the slot provides for fluid communication out of one of the first or second tip pockets.