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公开(公告)号：US11746659B2
公开(公告)日：2023-09-05
申请号：US17561617
申请日：2021-12-23
Inventor： Robert W. Heeter , Daniel E. Molnar, Jr. , Christopher D. Hall
CPC classification number: F01D5/16 , F01D5/147 , F05D2260/961
Abstract: An airfoil for use in a gas turbine engine is formed to define a cavity formed in the airfoil. The airfoil further includes at least one obstructing member arranged within the cavity and a shear-thickening fluid disposed in the cavity. A viscosity of the shear-thickening fluid increases in response to the airfoil experiencing an aeromechanic response or vibrations such that the obstruction of the movement of the thicker fluid by the obstructing member dampens the vibrations of the airfoil and reduces negative effects of a dynamic response of the airfoil.
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公开(公告)号：US11686211B2
公开(公告)日：2023-06-27
申请号：US17412222
申请日：2021-08-25
Applicant: Rolls-Royce Corporation
Inventor： Christopher D. Hall , William B. Bryan , Daniel E. Molnar, Jr.
CPC classification number: F01D17/162 , F01D17/08 , F05D2220/32 , F05D2240/12 , F05D2270/10 , F05D2270/102 , F05D2270/301
Abstract: A fan assembly includes a fan duct, an inlet fan, and an outlet guide vane assembly. The inlet fan forces fan exit air toward an aft end of the fan duct. The outlet guide vane assembly is located in the fan duct downstream of the inlet fan and adjusts a direction of the fan exit air, and includes a plurality of outlet guide vanes and a plurality of actuation assemblies that control rotation of the outlet guide vanes about a pitch axis. The outlet guide vanes include a leading edge portion and a trailing edge portion rotatably coupled to an axially aft edge of the leading edge portion. The actuation assembly rotates the leading edge portion and the trailing edge portion to minimize losses created by distortions in fan inlet air and created by the leading edge portion redirecting the fan exit air in the first direction.
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