Turbine vane with dirt separator
First Claim
1. An air cooled turbine stator vane comprising:
- an outer endwall and an inner endwall;
an airfoil extending between the outer endwall and the inner endwall;
a 3-pass aft flowing serpentine flow cooling circuit formed within the airfoil to provide cooling;
the 3-pass serpentine circuit including a first leg located along the leading edge of the airfoil;
a cooling an supply channel positioned between the first leg and the second leg of the 3-pass serpentine circuit;
the cooling air supply channel having an arrangement of ribs along the walls to produce a vortex flow within the cooling supply air;
a row of impingement cooling holes between the cooling supply channel and the first leg of the serpentine circuit; and
,a dirt collector pocket located on a bottom of the cooling air supply charnel.
3 Assignments
0 Petitions
Accused Products
Abstract
A turbine stator vane with a cooling circuit that improves the cooling effectiveness of the airfoil as well as collects any dirt particles before passing the clean cooling an through the cooling circuit. The airfoil includes a 3-pass aft flowing serpentine circuit with a first leg located along the airfoil leading edge and connected to a showerhead arrangement for film cooling discharge. A cooling air supply channel is located between the first leg and the second leg of the serpentine flow circuit, and the cooling supply channel includes ribs arranged to produce a vortex flow within the cooling air that collects the dirt particles within a center of the vortex flow and deposits the dirt particles at the bottom of the channel. The vortex flow cooling air flows through impingement holes to produce impingement cooling on the backside wall of the leading edge with clean cooling air. The vortex flow pattern produces higher flow velocities at the outer periphery of the vortex which produces a higher impingement jet velocity of the cooling air to improve convection and impingement cooling capability.
44 Citations
10 Claims
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1. An air cooled turbine stator vane comprising:
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an outer endwall and an inner endwall; an airfoil extending between the outer endwall and the inner endwall; a 3-pass aft flowing serpentine flow cooling circuit formed within the airfoil to provide cooling; the 3-pass serpentine circuit including a first leg located along the leading edge of the airfoil; a cooling an supply channel positioned between the first leg and the second leg of the 3-pass serpentine circuit; the cooling air supply channel having an arrangement of ribs along the walls to produce a vortex flow within the cooling supply air; a row of impingement cooling holes between the cooling supply channel and the first leg of the serpentine circuit; and
,a dirt collector pocket located on a bottom of the cooling air supply charnel. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A process for cooling a turbine stator vane and separating dirt particulates from the cooling air, the process comprising the steps of:
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supplying pressurized cooling air to a cooling supply channel formed within the vane airfoil; producing a vortex flow in the cooling air supply to collect any dirt particulates along a center of the vortex flow; collecting the dirt particulates at a bottom of the vortex flow in the cooling supply channel; impinging the vortex flowing cooling air against the backside wall of the airfoil leading edge; discharging some of the spent impingement cooling air as film cooling air onto an outer surface of the airfoil leading edge; and
,passing the dirt free and remaining spent impingement cooling air along a serpentine flow path to provide cooling for the remaining sections of the airfoil. - View Dependent Claims (9, 10)
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Specification