Gas turbine engine airfoil integrated heat exchanger
A heat exchanger apparatus includes: (a) an airfoil having opposed pressure and suction sides, a root, a tip, and spaced-apart leading and trailing edges; and (b) a plenum integrally formed within the airfoil which is configured to receive a flow of circulating working fluid; and (c) inlet and outlet ports communicating with the plenum and an exterior of the airfoil.
1. A guide vane apparatus for a gas turbine engine comprising:
(a) an annular array of stationary airfoils, each stationary airfoil comprising:
(i) opposed pressure and suction sides, a root, a tip, and spaced-apart leading and trailing edges;
(ii) a plenum integrally formed within the airfoil which is configured to receive a flow of circulating working fluid;
(iii) inlet and outlet ports disposed at the tip of the airfoil, each port communicating with the plenum and an exterior of the airfoil;
(b) an annular casing surrounding the array of stationary airfoils, wherein the tip of each stationary airfoil is connected to the casing; and
(c) a jumper tube assembly coupled to each of the inlet and outlet ports, each jumper tube assembly comprising:
(i) a jumper tube having a first end received within the respective port, the jumper tube spanning a radial gap between the tip of the airfoil and the casing and passing through an opening in the casing; and
(ii) a retainer attached to the casing which receives a second end of the jumper tube and retains the jumper tube in position, the retainer including a fluid fitting in fluid communication with the jumper tube, wherein the retainer includes an internal surface that blocks the jumper tube from radially outward movement relative to the casing.
2. The apparatus of claim 1 , wherein the plenum comprises:
an array of first walls lying in a first plane and extending across the plenum at a first acute angle; and
an array of second walls lying underneath the first walls in a second plane and extending across the plenum perpendicular to the first walls.
3. The apparatus of claim 1 wherein the airfoil comprises:
a metallic body defining the pressure and suction sides, root, tip, and leading and trailing edges, the body having a recessed pocket formed in a selected one of the pressure and suction sides; and
a metallic cover having an outer peripheral edge, an inner surface, and an outer surface, the outer surface defining a portion of the selected one of the pressure or suction sides, wherein the cover is attached to the body, wherein the pocket and the cover cooperatively define the plenum.
4. The apparatus of claim 3 wherein the cover is attached to the body by a solid state bond.