Valve system for a gas turbine engine
View Patent ↗A valve system intermediate a secondary flow path and a primary flow path to selectively communicate secondary airflow into the primary gas flow path and control airflow injected from a higher pressure plenum into a lower pressure flowpath.
1. A valve system intermediate a secondary flow path and a primary flow path of a gas turbine engine comprising:
a contoured frame including a flow passage there through;
a shaped door pivotable relative said contoured frame between an open position and a closed position, said shaped door and said contoured frame together defining an airfoil shape when said shaped door is in said closed position;
a nozzle to eject said primary flow;
said door located at a downstream end of said nozzle;
wherein said contoured frame is mounted to an inner cooling liner structure of a core of a gas turbine engine;
wherein said shaped door is pivotable about a door axis at a downstream end of said shaped door and said shaped door opens to direct airflow through said contoured frame.
2. The system as recited in claim 1 , further comprising an actuator system which operates said shaped door.
3. The system as recited in claim 1 , wherein said contoured frame supports a multitude of shaped doors, each of said multitude of shaped doors movable relative to said contoured frame.
4. The system as recited in claim 3 , further comprising an actuator system which operates said multitude of shaped doors.
5. The system as recited in claim 3 , further comprising an actuator system which independently operates each of said multitude of shaped doors.
6. The system as recited in claim 1 , wherein said flow passage includes a structure that directs flow there through, and said structure is selected from the group consisting of a mesh, a grid, a metering hole and a honeycomb.
7. The system as recited in claim 6 , wherein said structure is the mesh.
8. The system as recited in claim 6 , wherein said structure is the grid.
9. The system as recited in claim 6 , wherein said structure is the honeycomb.
10. A gas turbine engine comprising:
an engine duct structure and an inner cooling liner structure which at least partially define a secondary flow path and a primary flow path along a longitudinal axis;
a contoured frame mounted to said inner cooling liner structure, said contoured frame including a flow passage there through; and
at least one shaped door pivotable relative said contoured frame between an open position away from the longitudinal axis and a closed position toward the engine axis, said at least one shaped door and said contoured frame together defining an airfoil shape when said at least one shaped door is in said closed position;
a nozzle to eject said primary flow;
said door located at a downstream end of said nozzle;
wherein said contoured frame is mounted to an inner cooling liner structure of a core of a gas turbine engine;
wherein said shaped door is pivotable about a door axis at a downstream end of said shaped door and said shaped door opens to direct airflow through said contoured frame.
11. The engine as recited in claim 10 , wherein said contoured frame is flush with said inner cooling liner structure.
12. The engine as recited in claim 10 , wherein said at least one shaped door includes a multitude of shaped doors, each of said multitude of shaped doors movable relative to said contoured frame.
13. The system as recited in claim 10 , further comprising an actuator system which operates said shaped door, said actuator system including a linkage which extends through said engine duct structure.
14. The engine as recited in claim 10 , wherein said secondary flow path is defined radially about said primary flow path.
15. The engine as recited in claim 10 , including a core engine comprising a compressor section, a combustor section and a turbine section arranged to discharge an exhaust flow to said primary flow path and said primary flow path is defined by said inner cooling liner structure.
16. The engine as recited in claim 10 , wherein said flow passage includes a structure that directs flow there through, and said structure is selected from the group consisting of a mesh, a grid, a metering hole and a honeycomb.
17. A method of a controlling communication of a secondary flow path with a primary flow path of a gas turbine engine, the method comprising:
selectively pivoting at least one door about a door axis located at a downstream end of the at least one door between an open position and a closed position relative a frame mounted intermediate the secondary flow path and the primary flow path;
providing a nozzle to eject said primary flow;
locating said door at a downstream end of said nozzle;
mounting said frame to an inner cooling liner structure of a core of a gas turbine engine;
pivoting said door about a door axis at a downstream end of said door and wherein said door opens to direct airflow through said frame.
18. A method as recited in claim 17 , including:
(a) opening the at least one door outwardly relative the primary flow path, and the primary flow path is a core engine exhaust flow.
19. The method as recited in claim 17 , including directing flow through a flow passage of the frame using a structure selected from the group consisting of a mesh, a grid, a metering hole and a honeycomb.