Counterbalanced flow turbine nozzle
AssigneeGeneral Electric Company
InventorsWenfeng Lu, Russel Castle
Life of this patent
Estimating the term…
Abstract
A turbine nozzle includes hollow vanes extending between outer and inner bands. The vanes include a pattern of outlet holes distributed over the pressure and suction sides thereof for discharging cooling air collectively at a reference flowrate. The pattern of holes includes multiple rows of showerhead holes bridging the leading edge, and two rows of gill holes spaced aft therefrom along the suction side. A row of auxiliary holes is spaced aft from the showerhead holes through the pressure side, and the gill holes are sized to counterbalance the added discharge air through the auxiliary holes for maintaining the reference flowrate.
Claims20
A turbine nozzle comprising:
- a pair of hollow vanes fixedly joined to outer and inner bands, and each vane including opposite pressure and suction sides extending in span between said bands, and extending in chord between leading and trailing edges;
- said trailing edge of a first one of said vanes forming with said suction side of a second one of said vanes forward of said trailing edge thereof a throat of minimum flow area between said vanes;
- each of said vanes further including identical patterns of outlet holes distributed over said pressure and suction sides thereof for discharging cooling air therefrom collectively at a reference flowrate through each vane;
- said patterns of holes including multiple rows of showerhead holes bridging said leading edge, and two rows of gill holes spaced aft from said showerhead holes along said suction sides of said vanes;
- a row of auxiliary holes spaced aft from said showerhead holes through said pressure side in each vane;
- and
- said gill holes being sized to counterbalance added discharge of said cooling air through said auxiliary holes for maintaining said reference flowrate.
A turbine nozzle comprising:
- a hollow vane including opposite pressure and suction sides extending in span between outer and inner bands, and extending in chord between leading and trailing edges;
- said vane further including a pattern of outlet holes distributed over said pressure and suction sides for discharging cooling air therefrom collectively at a reference flowrate;
- said pattern of holes including multiple rows of showerhead holes bridging said leading edge, and two rows of gill holes spaced aft from said showerhead holes along said suction side;
- a row of auxiliary holes spaced aft from said showerhead holes through said pressure side;
- and
- said gill holes being sized to counterbalance added discharge of said cooling air through said auxiliary holes for maintaining said reference flowrate.
Dependencies are inferred from the claim text.