Turbine blade with tip cooling and sealing
AssigneeFlorida Turbine Technologies, Inc.
InventorGeorge Liang
Life of this patent
Estimating the term…
Abstract
A turbine rotor blade with a squealer tip having an enclosed pocket channel formed below the squealer floor and having an inlet end opening adjacent to a leading edge region of the blade tip to receive cooler hot gas stream and direct the cooler gas toward the trailing edge region, and with film cooling holes along the aft section of the blade tip that discharge the cooler hot gas flow passing through the pocket channel onto the tip rail surface to produce both cooling and sealing. A similar pocket channel with film cooling holes can be used on the pressure and the suction sides of the blade tip.
Claims13
A turbine rotor blade for a gas turbine engine comprising:
- an airfoil section having a pressure side wall and a suction side wall with a leading edge region and a trailing edge region;
- a blade tip region with a pressure side tip rail and a suction side tip rail forming a squealer pocket;
- a pressure side pocket channel and a suction side pocket channel separated by a partition rib;
- the pressure side and suction side pocket channels extend from the leading edge region to the trailing edge region;
- the pressure side and suction side pocket channels have inlets that open to a flow of a hot gas stream passing over the blade tip region;
- a first row of film cooling holes connected to the pressure side pocket channel and opening onto the pressure side wall of the blade tip region;
- and,
- a second row of film cooling holes connected to the suction side pocket channel and opening onto the suction side wall of the blade tip region.
A turbine rotor blade for a gas turbine engine comprising:
- an airfoil section having a pressure side wall and a suction side wall with a leading edge region and a trailing edge region;
- a blade tip region with a pressure side tip rail and a suction side tip rail forming a squealer pocket;
- an enclosed pocket channel having an inlet opening adjacent to a leading edge region of the blade tip and extending toward the trailing edge region of the blade tip;
- and,
- a row of film cooling holes opening onto a side wall of the blade just below the tip rail edge and connected to the enclosed pocket channel and directed to discharge cooling air toward the tip rail.
Dependencies are inferred from the claim text.