Back to results
US 8,297,927 B1Granted
Near wall multiple impingement serpentine flow cooled airfoil
AssigneeFlorida Turbine Technologies, Inc.
InventorGeorge Liang
Life of this patent
Estimating the term…
Abstract
A turbine airfoil with pressure and suction side walls having a series of radial extending multiple impingement cooling channels in which each channel is formed with a series of impingement chambers and impingement holes that discharge impingement cooling air against the backside walls of the airfoil. The spent impingement cooling air from the radial impingement channels is discharged into collector cavities and then discharge as film cooling air onto the external surface of the airfoil.
Claims17
An air cooled turbine airfoil comprising:
- an airfoil wall having a hot gas flow side and an internal cooling air chamber side opposite to the hot gas flow side;
- a first radial extending channel formed within the airfoil wall, the first radial extending channel having formed therein a series of impingement holes and impingement chambers extending along the channel;
- a second radial extending channel formed within the airfoil wall and adjacent to the first radial extending channel, the second radial extending channel having formed therein a series of impingement holes and impingement chambers extending along the channel;
- and,
- the first radial extending channel being connected to the second radial extending channel such that cooling air from the first radial extending channel flows into the second radial extending channel.
2 more elements
An air cooled turbine stator vane comprising:
- an airfoil extending from an inner diameter endwall and an outer diameter endwall;
- an inner collection chamber formed between a pressure side airfoil wall and a suction side airfoil wall;
- a pressure side serpentine flow cooling circuit formed within the airfoil wall of the pressure side, the pressure side serpentine flow cooling circuit including a plurality of channels each having formed therein a series of impingement holes and impingement chambers to form a series of impingement cooling along the channels;
- a suction side serpentine flow cooling circuit formed within the airfoil wall of the suction side, the suction side serpentine flow cooling circuit including a plurality of channels each having formed therein a series of impingement holes and impingement chambers to form a series of impingement cooling along the channels;
- and,
- an outlet of the last channel in the pressure side serpentine flow cooling circuit and the suction side serpentine flow cooling circuit is connected to the inner collection chamber.
3 more elements
An air cooled turbine stator vane comprising:
- a leading edge region and a trailing edge region;
- a pressure side wall and a suction side wall extending between the leading edge region and the trailing edge region;
- a plurality of ribs extending from the pressure side wall to the suction side wall and forming a leading edge impingement chamber, a forward collection chamber, a middle collection chamber and an aft collection chamber;
- a first serpentine flow cooling circuit formed in the suction side wall in which each leg of the serpentine forms a series of impingement holes and impingement chambers to provide impingement cooling to the suction side wall;
- a second serpentine flow cooling circuit formed in the pressure side wall in which each leg of the serpentine forms a series of impingement holes and impingement chambers to provide impingement cooling to the pressure side wall;
- the first serpentine flow cooling circuit having a last leg that discharges into the forward collection chamber;
- the second serpentine flow cooling circuit having a last leg that discharges into the middle collection chamber;
- a third serpentine flow cooling circuit formed in the suction side wall in which each leg of the serpentine forms a series of impingement holes and impingement chambers to provide impingement cooling to the suction side wall;
- a fourth serpentine flow cooling circuit formed in the pressure side wall in which each leg of the serpentine forms a series of impingement holes and impingement chambers to provide impingement cooling to the pressure side wall;
- the third and the fourth serpentine flow cooling circuits each having a last leg that discharges into the aft collection chamber;
- the forward and the middle collection chambers each being connected to a row of film cooling holes;
- and,
- the aft collection chamber connected to a row of trailing edge exit holes.
10 more elements
Dependencies are inferred from the claim text.