Cooled turbine stator vane
First Claim
1. A turbine stator vane for use in a gas turbine engine, the vane comprising:
- an inner diameter endwall and an outer diameter endwall;
an airfoil extending between the inner and the outer diameter endwalls;
a showerhead arrangement includes film cooling holes in a lower half of a leading edge oriented to direct cooling air upward, and film cooling holes in an upper half of the leading edge oriented to direct cooling air downward;
a row of exit cooling slots on the trailing edge region of the airfoil;
a slanted rib slants toward the trailing edge from the outer endwall to the inner endwall, the slanted rib extending between the outer diameter endwall and the inner diameter endwall and separating a leading edge cavity within the airfoil from a trailing edge cavity;
a leading edge impingement tube secured within the leading edge cavity;
a trailing edge impingement tube secured within the trailing edge cavity;
the row of exit cooling slots being connected directly to the trailing edge cavity; and
,cooling air supply means to supply compressed cooling air to the leading edge cavity and the trailing edge cavity.
1 Assignment
0 Petitions
Accused Products
Abstract
A first stage turbine stator vane used in an industrial gas turbine engine, the vane having an outer endwall and an inner endwall with the airfoil extending between the two endwalls. A showerhead arrangement of film cooling holes is located along the leading edge region, and a row of exit cooling air slots is located along the trailing edge of the airfoil. A slanted rib extends from the outer endwall to the inner endwall and separates the vane into a forward cavity and an aft cavity. A leading edge impingement tube is secured within the forward cavity to provide impingement cooling to the leading edge walls of the airfoil. The leading edge impingement tube includes a cooling air inlet section extending out from the inner endwall so that a vena contractor forms in the tube entrance before the impingement holes begin. The leading edge impingement tube narrows in the cooling air flow direction. The trailing edge impingement tube has similar construction but has the cooling air inlet extending out from the outer endwall. With this design, the first stage vane can use both impingement cooling of the leading edge region and showerhead film cooling of the leading edge airfoil surface to allow for a higher gas flow temperature across the vane.
-
Citations
17 Claims
-
1. A turbine stator vane for use in a gas turbine engine, the vane comprising:
-
an inner diameter endwall and an outer diameter endwall; an airfoil extending between the inner and the outer diameter endwalls; a showerhead arrangement includes film cooling holes in a lower half of a leading edge oriented to direct cooling air upward, and film cooling holes in an upper half of the leading edge oriented to direct cooling air downward; a row of exit cooling slots on the trailing edge region of the airfoil; a slanted rib slants toward the trailing edge from the outer endwall to the inner endwall, the slanted rib extending between the outer diameter endwall and the inner diameter endwall and separating a leading edge cavity within the airfoil from a trailing edge cavity; a leading edge impingement tube secured within the leading edge cavity; a trailing edge impingement tube secured within the trailing edge cavity; the row of exit cooling slots being connected directly to the trailing edge cavity; and
,cooling air supply means to supply compressed cooling air to the leading edge cavity and the trailing edge cavity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A turbine stator vane for use in a gas turbine engine, the vane comprising:
-
an inner diameter endwall and an outer diameter endwall; an airfoil extending between the inner and the outer diameter endwalls; a showerhead arrangement of film cooling holes on a leading edge region of the airfoil, the showerhead includes an upper section of film cooling holes directed downwards and a lower section of film cooling holes directed upwards; a row of exit cooling slots on the trailing edge region of the airfoil; a slanted rib slants toward the trailing edge from the outer endwall to the inner endwall, the slanted rib extending between the outer diameter endwall and the inner diameter endwall and separating a leading edge cavity within the airfoil from a trailing edge cavity; a leading edge impingement tube secured within the leading edge cavity; a trailing edge impingement tube secured within the trailing edge cavity; the row of exit cooling slots being connected directly to the trailing edge cavity; and
,cooling air supply means to supply compressed cooling air to the leading edge cavity and the trailing edge cavity. - View Dependent Claims (10, 11, 12, 13)
-
-
14. A turbine stator vane for use in a gas turbine engine, the vane comprising:
-
an inner diameter endwall and an outer diameter endwall; an airfoil extending from the inner diameter endwall to the outer diameter endwall; a leading edge cooling supply cavity with a showerhead arrangement of film cooling holes on a leading region of the airfoil; a trailing edge cavity disposed within the airfoil and separating from the leading edge cavity; an impingement tube sized to fit within the leading cavity, the impingement tube having impingement cooling holes to direct impingement cooling air to a leading edge region of the cavity; and
,the impingement tube includes an inlet projection out from an inner impingement plate that connected to the inner diameter endwall at a distance X such that a vena contractor is fully reattached to the tube upstream from the impingement holes. - View Dependent Claims (15, 16, 17)
-
Specification