Cooling system for a tip of a turbine blade
AssigneeSiemens Westinghouse Power Corporation
InventorGeorge Liang
Life of this patent
Estimating the term…
Abstract
A turbine blade for a turbine engine having at least one secondary flow deflector proximate to a blade tip for reducing the effective flow path between the blade tip and an adjacent outer seal. The turbine blade may be a superblade having a central opening forming a hollow turbine blade. The turbine blade may include a secondary flow deflector on upstream sides of the pressure side wall and the suction side wall. The downstream sides of the pressure and suction side walls may include chamfered corners. The secondary flow deflector reduces the effective flow path between the blade tip and an outer seal in numerous ways.
Claims20
A turbine blade, comprising:
- a generally elongated blade having a leading edge, a trailing edge, and a tip at a first end, a root coupled to the blade at an end generally opposite the first end for supporting the blade and for coupling the blade to a disc, a longitudinal axis extending from the tip to the root, at least one central opening extending from the tip through a substantial portion of the blade, wherein an outer surface of a pressure side of the blade includes a secondary flow deflector proximate to the tip;
- the generally elongated blade formed from an outer wall and an inner wall with a plurality of cooling channels extending from a cooling supply cavity in the root to the tip of the blade between the outer and inner walls;
- a plurality of exhaust holes in the tip that are coupled to the cooling channels for exhausting cooling fluids from the cooling channels along the longitudinal axis;
- and
- a plurality of film cooling holes in the outer surface for exhausting air onto the secondary flow deflector towards the tip.
A turbine blade, comprising:
- a generally elongated blade having a leading edge, a trailing edge, and a tip at a first end, a root coupled to the blade at an end generally opposite the first end for supporting the blade and for coupling the blade to a disc, a longitudinal axis extending from the tip to the root, at least one central opening extending from the tip through a substantial portion of the blade, wherein an outer surface of a pressure side of the blade includes a secondary flow deflector proximate the tip and an interior surface of a suction side of the blade includes a secondary flow deflector proximate to the tip;
- the generally elongated blade formed from an outer wall and an inner wall with a plurality of cooling channels extending from a cooling supply cavity in the root to the tip of the blade between the outer and inner walls;
- a plurality of exhaust holes in the tip that are coupled to the cooling channels for exhausting cooling fluids from the cooling channels along the longitudinal axis;
- and
- a plurality of film cooling holes in the outer surface exhausting air onto the secondary flow deflectors towards the tips of the blade.
Dependencies are inferred from the claim text.