Turbine blade with tip trench
AssigneeSiemens Aktiengesellschaft
InventorsAli Akturk, Andrew Miller, Krishan Mohan, David Monk
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Abstract
A turbine blade includes a tip cap disposed over an outer wall of a blade airfoil. A trench is defined on a radially outer side of the tip cap facing a hot gas path fluid. The trench is formed by a trench floor flanked on laterally opposite sides by first and second trench side faces such that the trench floor is located radially inwardly in relation to a radially outer surface of the tip cap. The trench extends from a trench inlet located at or proximal to an airfoil leading edge to a trench outlet located at or proximal to an airfoil trailing edge. The trench is configured to entrain a tip leakage flow from the trench inlet to the trench outlet.
Claims15
A turbine blade comprising:
- an airfoil comprising an outer wall formed by a pressure side and a suction side joined at a leading edge and at a trailing edge,
- a blade tip-at a first radial end and a blade root at a second radial end opposite the first radial end for supporting the blade and for coupling the blade to a disc,
- wherein the blade comprises:
- a tip cap disposed over the outer wall of the airfoil,
- wherein a trench is defined on a radially outer side of the tip cap facing a hot gas path fluid, the trench being formed by a trench floor flanked on laterally opposite sides by first and second trench side faces such that the trench floor is located radially inwardly in relation to a radially outer surface of the tip cap,
- wherein the trench extends from a trench inlet located at or proximal to the leading edge to a trench outlet located at or proximal to the trailing edge), the trench) being configured to entrain a tip leakage flow from the trench inlet to the trench outlet.
Dependencies are inferred from the claim text.