Back to results
US 7,246,999 B2Granted
Stepped outlet turbine airfoil
AssigneeGeneral Electric Company
InventorsRobert Francis Manning, Thomas Edward Demarche, David Allen Flodman
Life of this patent
Estimating the term…
Abstract
A turbine airfoil includes an internal cooling circuit between opposite pressure and suction sidewalls. The pressure sidewall includes a row of outlet slots for the circuit separated by converging partitions. Each slot includes an inlet, throat, and diverging outlet. Each of the partitions includes a step in a converging sidewall thereof for increasing divergence of the slots to diffuse coolant discharged therethrough.
Claims23
A turbine airfoil comprising:
- opposite pressure and suction sidewalls extending longitudinally in span and axially in chord between opposite leading and trailing edges, and having an internal cooling circuit therein for circulating a coolant therethrough;
- said pressure sidewall including a row of diverging outlet slots joined to said cooling circuit, and separated by corresponding converging partitions having opposite sidewalls defining sides of said slots;
- each of said slots including in series a converging inlet, a throat of minimum flow area, and a diverging outlet exposed in said pressure sidewall, and separated from an adjacent outlet by an exposed converging land at the aft end of an intervening partition;
- and
- each of said partitions includes a step in said partition sidewall for abruptly decreasing width of said partition and locally increasing divergence of said slots to diffuse said coolant discharged therethrough.
2 more elements
A turbine airfoil comprising:
- opposite pressure and suction sidewalls extending longitudinally in span and axially in chord between opposite leading and trailing edges;
- said sidewalls being spaced apart between said leading and trailing edges to define an internal cooling circuit therein for circulating a coolant therethrough;
- said pressure sidewall including a row of outlet slots extending therethrough along said trailing edge in flow communication with said cooling circuit for discharging said coolant therefrom;
- said slots being separated from each other by corresponding partitions having opposite sidewalls defining sides of said slots, and each slot includes an inlet at a forward end of said partitions, a throat following said inlet, and an outlet along an aft end of said partitions;
- and
- each of said slots diverges aft and includes a step in said partition sidewall increasing divergence for diffusing said coolant discharged therethrough.
3 more elements
Dependencies are inferred from the claim text.