Turbine airfoil with de-coupled platform

Details Turbine airfoil with de-coupled platform Turbine airfoil with de-coupled platform

2006-06-14

2009-10-06

Kershteyn, Igor (Department: 3745)

Rotary kinetic fluid motors or pumps

Including thermal expansion joint

Radially sliding

C415S115000, C416S09700R

Reexamination Certificate

active

07597536

ABSTRACT:
An airfoil used in a gas turbine engine, such as a turbine blade, includes a thin slot formed between a platform section and an airfoil section of the blade, with a metering hole providing for a cooling air passage between a dead rim cavity and the thin slot, such that cooling air passes through the thin slot and out onto the transition between the platform and airfoil for cooling purposes. A plurality of thin slots is arranged around the periphery of the airfoil on the platform of the blade and extends from the leading edge to the trailing edge. In another embodiment, one thin slot could extend from the around the pressure side and the suction side of the airfoil. The thin slot not only provides cooling air to the transition region of the blade, but also de-couples the platform from the airfoil of the blade to reduce stress levels due to thermal gradients.

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