Patent ID: 7347671

Claim:
A turbine blade having opposing pressure and suction side walls adjoining at leading and trailing edges of the blade, and defining at least one internal channel providing a flow passage for a cooling medium, said at least one channel including a plurality of turbulence promoting ribs mounted on a channel wall surface, at least one of the ribs extending at an angle of between 62° and 79° from the surface of the at least one channel with respect to the direction of flow therethrough, wherein each rib comprises two rib portions joined at one end thereof to form a chevron junction, said chevron junction defining an angle of between 80° and 120° between the two rib portions and being directed into the flow of the cooling medium within the at least one channel, and wherein at least one gap is provided in one rib portion, and at least one gap is provided in the other rib portion.