Apparatus, method and system for gas turbine engine noise reduction
First Claim
1. An apparatus for reducing noise generated by an aircraft gas turbine engine having an engine core with a longitudinal centerline, a core nozzle having an exit plane and fan nozzle having an exit plane, wherein a fan air stream flows between the fan nozzle and the core nozzle and a core air stream flows between the core nozzle and the engine core when the aircraft is in flight, the apparatus comprises at least one gas injector for injecting gas into the fan air stream proximate to the fan nozzle exit plane toward the engine core longitudinal centerline, into the core air stream proximate to the core nozzle exit plane toward the engine core longitudinal centerline, or combination thereof, and the at least one gas injector has a plurality of gas exit ports having a shape which may be slotted ports, circular ports or a combination of slotted ports and circular ports.
2 Assignments
0 Petitions
Accused Products
Abstract
An apparatus for reducing gas turbine engine noise, such as noise generated by an aircraft gas turbine engine, comprises at least one and preferably a plurality of gas injectors for injecting gas such as high pressure engine bleed air, diverted core air, air obtained from a pressurized storage container or air obtained from a synthetic jet actuator into the area proximate to one or more engine nozzle portions, thereby disrupting the noise-generating gas streams generated by the engine exhaust and the travel of the airplane through the air. The apparatus is particularly useful for reducing engine noise during the takeoff period of aircraft flight.
-
Citations
17 Claims
- 1. An apparatus for reducing noise generated by an aircraft gas turbine engine having an engine core with a longitudinal centerline, a core nozzle having an exit plane and fan nozzle having an exit plane, wherein a fan air stream flows between the fan nozzle and the core nozzle and a core air stream flows between the core nozzle and the engine core when the aircraft is in flight, the apparatus comprises at least one gas injector for injecting gas into the fan air stream proximate to the fan nozzle exit plane toward the engine core longitudinal centerline, into the core air stream proximate to the core nozzle exit plane toward the engine core longitudinal centerline, or combination thereof, and the at least one gas injector has a plurality of gas exit ports having a shape which may be slotted ports, circular ports or a combination of slotted ports and circular ports.
-
14. A method for reducing noise generated by an aircraft gas turbine engine, the method comprising:
-
(a) providing an apparatus for reducing noise generated by the gas turbine engine, the engine having an engine core with a longitudinal centerline, a core nozzle having an exit plane and fan nozzle having an exit plane, wherein a fan air stream flows between the fan nozzle and the core nozzle and a core air stream flows between the core nozzle and the engine core when the aircraft is in flight, the apparatus comprising at least one gas injector for injecting gas into the fan air stream proximate to the fan nozzle exit plane toward the engine core longitudinal centerline, into the core air stream proximate to the core nozzle exit plane toward the engine core longitudinal centerline, or combination thereof, and the at least one gas injector having a plurality of gas exit ports having a shape which may be slotted ports, circular ports or a combination of slotted ports and circular ports; (b) introducing air into the apparatus during a takeoff portion of aircraft flight. - View Dependent Claims (15)
-
-
16. A system for reducing noise generated by an aircraft gas turbine engine, the system comprising:
-
(a) a source of gas; (b) an apparatus for reducing noise generated by the gas turbine engine, the engine having an engine core with a longitudinal centerline, a core nozzle having an exit plane and fan nozzle having an exit plane, wherein a fan air stream flows between the fan nozzle and the core nozzle and a core air stream flows between the core nozzle and the engine core when the aircraft is in flight, the apparatus comprising at least one gas injector for injecting gas into the fan air stream proximate to the fan nozzle exit plane toward the engine core longitudinal centerline, into the core air stream proximate to the core nozzle exit plane toward the engine core longitudinal centerline, or combination thereof, and the at least one gas injector having a plurality of gas exit ports having a shape which may be slotted ports, circular ports or a combination of slotted ports and circular ports.
-
-
17. An apparatus for reducing noise generated by an aircraft gas turbine engine, the engine having an engine core with a longitudinal centerline, a core nozzle having an exit plane and fan nozzle having an exit plane, wherein a fan air stream flows between the fan nozzle and the core nozzle and a core air stream flows between the core nozzle and the engine core when the aircraft is in flight, the apparatus comprises at least one gas injector for injecting gas into the fan air stream proximate to the fan nozzle exit plane toward the engine core longitudinal centerline, into the core air stream proximate to the core nozzle exit plane toward the engine core longitudinal centerline, or combination thereof, and the at least one gas injector comprises a gas delivery tube which has a plurality of gas exit ports having a shape which may be slotted ports, circular ports or a combination of slotted ports and circular ports, the engine has an inner barrel, and the tube is circumferentially located around an outer surface of the inner barrel.
Specification