Fluid reaction surfaces (i.e. – impellers) – With fluid passage in working member communicating with... – Discharge solely at periphery normal to rotation axis
Reexamination Certificate
2006-11-30
2010-12-28
Look, Edward (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
With fluid passage in working member communicating with...
Discharge solely at periphery normal to rotation axis
C416S09700R, C416S228000, C416S235000
Reexamination Certificate
active
07857587
ABSTRACT:
A turbine blade with improved tip cooling includes an airfoil having a tip cap and a tip wall extending outwardly from the tip cap. A recessed portion of the tip wall forms a tip shelf. At least one tip shelf hole extends through the tip shelf in flow communication with an internal airfoil cooling circuit. At least one tip wall opening extends through the recessed portion of the tip wall radially outward of the tip shelf in flow communication with the internal cooling circuit. The recessed tip wall portion may be tapered from a wider base to a minimum thickness. In a cooling method, cooling air channeled through the tip wall openings joins and mixes with a stream of hot combustion gases downstream of where cooling air channeled through the tip shelf openings joins and mixes with the stream of hot gasses to enhance convection cooling of the blade tip. A system for cooling a blade includes at least one tip shelf hole and at least one tip wall opening for channeling cooling air from an internal cooling circuit toward a stream of hot combustion gases for improved cooling of at least the blade tip.
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Correia Victor Hugo Silva
Manning Robert Francis
Reddy Bhanu Mahasamudram
Andes William Scott
General Electric Company
General Electric Company
Look Edward
Louke Marcella R.
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