An air induction system for an aircraft to control distortion and pressure recovery for improved aerodynamic performance. The system includes an inlet and at least one dielectric barrier discharge generator positioned upstream of the engine for imparting momentum to a low-energy boundary layer of ai
An air induction system for an aircraft to control distortion and pressure recovery for improved aerodynamic performance. The system includes an inlet and at least one dielectric barrier discharge generator positioned upstream of the engine for imparting momentum to a low-energy boundary layer of air. A plurality of spaced dielectric barrier discharge generators may be activated in selected combinations to optimize performance at respective flight conditions. In one embodiment, one or more generators may be oriented generally transverse relative to the flow of intake air to eject the boundary layer in a lateral direction and prevent its ingestion by the engine. In another embodiment, one or more generators may be oriented along the direction of flow to accelerate the boundary layer air.
대표청구항▼
What is claimed is: 1. A system comprising: an inlet defining a passageway for delivery of intake air toward an engine of an aircraft, wherein the passageway extends along a longitudinal axis of the inlet generally aligned with a direction of flow of air as the air approaches the inlet, wherein the
What is claimed is: 1. A system comprising: an inlet defining a passageway for delivery of intake air toward an engine of an aircraft, wherein the passageway extends along a longitudinal axis of the inlet generally aligned with a direction of flow of air as the air approaches the inlet, wherein the passageway defines an aperture at a first end of the passageway to receive a portion of the air as the intake air for delivery toward the engine at a second end of the passageway; a surface outside the passageway and upstream of the aperture, wherein the surface includes at least one of a wing surface or a body surface; and a control system including: at least one first dielectric barrier discharge generator positioned along the surface along the longitudinal axis to apply a first force to a boundary layer of the air approaching the inlet, wherein the boundary layer includes air flowing adjacent to the surface, wherein the first force is transverse to the longitudinal axis; and at least one second dielectric barrier discharge generator positioned along the surface such that the at least one second dielectric barrier discharge generator is between the at least one first dielectric barrier discharge generator and the aperture to apply a second force to a portion of the boundary layer, wherein the second force is directed parallel to the longitudinal axis or at an angle between the first force and the longitudinal axis, and wherein the second force accelerates the portion of the boundary layer toward the aperture or deflects the portion of the boundary layer away from the aperture. 2. The system of claim 1, wherein the at least one. first dielectric barrier discharge generator is oriented with a length extending in a direction having at least a component transverse to the longitudinal axis of the inlet. 3. The system of claim 1, wherein the at least one first dielectric barrier discharge generator is oriented with a length generally parallel to the longitudinal axis of the inlet. 4. The system of claim 1, wherein each of the dielectric barrier discharge generators is controlled for activation independently of each other dielectric barrier discharge generator. 5. The system of claim 1 wherein the at least one first dielectric barrier discharge generator comprises a plurality of first dielectric barrier discharge generators, and wherein the control system is configured to activate each of the plurality of first dielectric barrier discharge generators independently. 6. The system of claim 1, wherein the control system is configured to activate the at least one first dielectric barrier discharge generator independently of the at least one second dielectric barrier discharge generator. 7. The system of claim 1, wherein the at least one second dielectric barrier discharge generator is spaced from the longitudinal axis by a distance which is greater than a corresponding spacing of the at least one first dielectric barrier discharge generator from the longitudinal axis. 8. The system of claim 7, wherein each of the barrier discharge generators has a front end and a back end, and wherein the back end of the at least one first dielectric barrier discharge generator is positioned upstream of the front end of the at least one second dielectric barrier discharge generator. 9. The system of claim 7, wherein the control system further includes at least one intermediate barrier discharge generator which is disposed generally between the at least one first and the at least one second dielectric barrier discharge generators. 10. The system of claim 9, wherein the at least one intermediate barrier discharge generator is generally parallel with the at least one first dielectric barrier discharge generator. 11. The system of claim 7, wherein the at least one first dielectric barrier discharge generator and the at least one second dielectric barrier discharge generator are located on a first side of the longitudinal axis, wherein the system further comprises an opposing set of barrier discharge generators located on a second side of the longitudinal axis opposite the first side of the longitudinal axis, and wherein the opposing set of barrier discharge generators apply at least one third force to the air in a different direction from the first force and the second force. 12. The system of claim 11, wherein the opposing set of barrier discharge generators is generally symmetric about the longitudinal axis with other barrier discharge generators on the first side of the longitudinal axis. 13. The system of claim 1, wherein the at least one first dielectric barrier discharge generator is curved along at least a portion of a length of the at least one first dielectric barrier discharge generator, wherein a direction of the first force varies along at least the curved portion of the length. 14. The system of claim 13, wherein the at least one first dielectric barrier discharge generator has greater curvature toward an outboard lateral portion. 15. The system of claim 1, wherein the at least one second dielectric barrier discharge generator is at an orientation nonparallel with the at least one first barrier dielectric discharge generator. 16. The system of claim 15, wherein the at least one second dielectric discharge generator is oriented generally perpendicular to the longitudinal axis. 17. The system of claim 16, wherein the control system further includes a plurality of intermediate barrier discharge generators, wherein the plurality of intermediate barrier discharge generators are located generally between the at least one first dielectric barrier discharge generator and the at least one second dielectric barrier discharge generator and are placed at successively shallower angles with respect to the at least one first dielectric barrier discharge generator and the at least one second dielectric barrier discharge generator to transition a direction of force applied to the air between the first force and the second force. 18. A method of controlling an air induction system for an aircraft, the air induction system having an inlet to receive intake air for delivery toward an engine, the method comprising: activating at least one first dielectric barrier discharge generator to apply a first force to air moving relative to an inlet, wherein the at least one first dielectric barrier discharge generator is located along a surface of an aircraft, wherein the surface includes at least one of a wing surface and a body surface, and wherein the surface is upstream of the inlet to receive intake air for an engine such that at least a portion of the air moves past the surface prior to reaching the inlet; and activating at least one second dielectric barrier discharge generator to apply a second force to the air based on a flight condition of the aircraft, wherein the at least one second dielectric barrier discharge generator is downstream of the at least one first dielectric barrier generator, wherein the first force ejects a first portion of the air from an intake region of the inlet to divert the first portion of the air from being delivered to the engine and wherein the second force accelerates a second portion of the air toward the inlet when the second portion of the air is too near the inlet to be ejected, wherein the first and second forces are along non-parallel axes. 19. The method of claim 18, further comprising: activating-a first combination of dielectric barrier discharge generators in response to a first flight condition of the aircraft; and activating a second combination of dielectric barrier discharge generators different from the first combination in response to at a second flight condition of the aircraft. 20. The method of claim 18, wherein the second force is directed transverse to the fast force. 21. The method of claim 18, wherein the inlet has a longitudinal axis for alignment generally with a direction of flow of the air, and wherein the at least one first dielectric barrier discharge generator is misaligned with the longitudinal axis and the first force has a component which is transverse to the longitudinal axis. 22. The method of claim 21, wherein the at least one second dielectric barrier discharge generator is generally parallel to the at least one first dielectric barrier discharge generator and the second force has a component which is transverse to the longitudinal axis. 23. The method of claim 21, wherein the second force is directed at an angle between the first force and the longitudinal axis. 24. The method of claim 18, wherein the at least one first and the at least one second dielectric barrier discharge generators are arranged in spaced relation along the surface. 25. The method of claim 18, wherein the at least one first and the at least one second dielectric barrier discharge generators are arranged in one or more generally annular rows. 26. A system, comprising: an inlet defining an aperture to receive air for delivery toward an engine of an aircraft, wherein the inlet has a longitudinal axis generally aligned with a direction of flow of the air as the air approaches the inlet; a surface located upstream of the aperture such that at least a portion of the air moves past the surface prior to being received by the aperture; and a control system including: at least on first dielectric barrier discharge generator positioned along the surface on a first side of the longitudinal axis to apply a first force to the air; at least one second dielectric barrier discharge generator positioned along the surface on the first side of the longitudinal axis to apply a second force to the air, wherein the second force is in a different direction than a direction of the first force; and wherein the different direction is non-parallel to the direction of the first force. 27. The system of claim 26, wherein the control system further comprises at least one third dielectric barrier discharge generator positioned along the surface on the first side of the longitudinal axis to apply a third force to the air, wherein the third force is in a different direction than the first force and in a different direction than the second force. 28. The system of claim 26, wherein the first force has a component transverse to the longitudinal axis and the second force is generally parallel to the longitudinal axis. 29. The system of claim 26, wherein the first force acts to eject a first portion of the air from an intake region of the inlet and the second force acts to accelerate a second portion of the air toward the inlet when the second portion of the air is too near the inlet to be ejected. 30. A system, comprising: an inlet defining an aperture to receive air for delivery toward an engine of an aircraft, wherein the inlet has a longitudinal axis generally aligned with a direction of flow of the air as the air approaches the inlet; a surface located upstream of the aperture such that at least a portion of the air moves past the surface prior to being received by the aperture; and a control system including: a plurality of first dielectric barrier discharge generators positioned on opposing sides of the longitudinal axis to apply transverse forces to a first portion of the air passing over the plurality of first dielectric barrier discharge generators, wherein the transverse forces are transverse to the longitudinal axis; and one or more second dielectric barrier discharge generators positioned between the plurality of the first dielectric barrier discharge generators and the aperture to apply a second force to a second portion of the air passing over the one or more second dielectric barrier discharge generators, wherein the second force is substantially parallel to the longitudinal axis, wherein the transverse forces act to divert the first portion of the air from reaching the aperture and wherein the second force acts to accelerate the second portion of the air toward the aperture. 31. The system of claim 30, wherein the second force acts to accelerate the second portion of the air toward the aperture when the second portion of the air is too near the inlet to be ejected. 32. The system of claim 30, wherein each of the plurality of first dielectric barrier discharge generators is oriented with a length generally parallel to the longitudinal axis. 33. The system of claim 30, wherein the control system further includes at least one set of intermediate dielectric barrier discharge generators positioned on opposing sides of the longitudinal axis, wherein the at least one set of intermediate dielectric barrier discharge generators is positioned between the plurality of first dielectric barrier discharge generators and the one or more second dielectric barrier discharge generators, and wherein the at least one set of intermediate dielectric barrier discharge generators generate, intermediate forces in directions between directions of the transverse forces and the second force. 34. The system of claim 33, wherein the at least one set of intermediate dielectric barrier discharge generators are positioned at intermediate angles relative to the longitudinal axis such that lengths of each of the at least one set of intermediate dielectric barrier discharge generators are neither parallel to or transverse to the longitudinal axis.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (15)
Wainfan Barnaby Sam ; Liu Yu Ping ; Rihn Daniel R. ; Leggett Douglas William ; Georges Martin James ; Philhower Jeffry Scott ; Shultz Douglas Ellwood ; Boccados Charles, Aircraft engine air intake system.
Genssler Hans-Peter (Munich DEX) Lotter Kurt (Riemerling DEX), Apparatus for improving aerodynamic flow conditions at the air intake of gas turbine engines.
Hamstra Jeffrey William ; McCallum Brent Neal ; Sylvester Thomas Gerard ; Denner Brett Willian ; Moorehouse Jeffrey Allen, Transition shoulder system and method for diverting boundary layer air.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.