-
公开(公告)号：US20240239506A1
公开(公告)日：2024-07-18
申请号：US18316577
申请日：2023-05-12
摘要： An aircraft defining a longitudinal centerline and extending between a forward end and an aft end is provided. The aircraft comprises a fuselage extending between the forward end of the aircraft and the aft end of the aircraft; a wing assembly extending laterally outwardly with respect to the longitudinal centerline from a portion of the fuselage; an unducted turbofan engine; and a pylon fairing that connects the unducted turbofan engine to the wing assembly, the pylon fairing defining a lengthwise direction and comprising a leading edge section, the leading edge section defining a leading edge camber that varies along the lengthwise direction of the pylon fairing.
-
公开(公告)号：US20240239505A1
公开(公告)日：2024-07-18
申请号：US18307917
申请日：2023-04-27
摘要： An aircraft defining a longitudinal centerline and extending between a forward end and an aft end is provided. The aircraft comprises a fuselage extending between the forward end of the aircraft and the aft end of the aircraft; a wing assembly extending laterally outwardly with respect to the longitudinal centerline from a portion of the fuselage; an unducted turbofan engine including an unducted fan that defines a plurality of fan wakes; and a pylon fairing that connects the unducted turbofan engine to the wing assembly, the pylon fairing defining a pylon fairing dihedral, wherein the pylon fairing dihedral is in a direction opposite the incoming fan flow swirl and associated sheared profiles of fan wakes upon arrival at the pylon leading edge.
-
公开(公告)号：US20240239503A1
公开(公告)日：2024-07-18
申请号：US18307110
申请日：2023-04-26
摘要： An aircraft defining a longitudinal centerline and extending between a forward end and an aft end is provided. The aircraft comprises a fuselage extending between the forward end of the aircraft and the aft end of the aircraft; a wing assembly extending laterally outwardly with respect to the longitudinal centerline from a portion of the fuselage; an unducted turbofan engine including an unducted fan defining a fan diameter; and a pylon fairing that connects the unducted turbofan engine to the wing assembly, the pylon fairing defining a leading edge and including a first inflection point along the leading edge, the first inflection point defining a first radius of curvature that is less than 5 times the fan diameter and greater than 0.1 times the fan diameter.
-
公开(公告)号：US20240239504A1
公开(公告)日：2024-07-18
申请号：US18307172
申请日：2023-04-26
摘要： An aircraft defining a longitudinal centerline and extending between a forward end and an aft end is provided. The aircraft comprises a fuselage extending between the forward end of the aircraft and the aft end of the aircraft; a wing assembly extending laterally outwardly with respect to the longitudinal centerline from a portion of the fuselage; an unducted turbofan engine; and a pylon fairing that connects the unducted turbofan engine to the wing assembly, the pylon fairing defining a lengthwise direction, a leading edge, a trailing edge, and a chord extending from the leading edge to the trailing edge, the pylon fairing including a maximum thickness portion along the lengthwise direction of the pylon fairing located between 10% and 60% of the chord.
-
公开(公告)号：US20230415914A1
公开(公告)日：2023-12-28
申请号：US18466930
申请日：2023-09-14
IPC分类号： B64D45/00 , B32B7/022 , B64C1/12 , B64C1/38 , B64D27/12 , F01D5/14 , F01D5/18 , F01D5/30 , F01D7/00 , F01D9/04 , F01D15/10 , F01D15/12 , F01D17/16 , F01D25/12 , F02C6/20 , F02C7/264 , F02C7/32 , F02C7/36 , F02C9/00 , F02C9/22 , F02K1/66 , F02K1/76
CPC分类号： B64D45/00 , B32B7/022 , B64C1/12 , B64C1/38 , B64D27/12 , F01D5/146 , F01D5/187 , F01D5/30 , F01D5/3007 , F01D7/00 , F01D9/041 , F01D15/10 , F01D15/12 , F01D17/162 , F01D25/12 , F02C6/206 , F02C7/264 , F02C7/32 , F02C7/36 , F02C9/00 , F02C9/22 , F02K1/66 , F02K1/76 , B32B2307/558 , B32B2307/72 , B32B2307/732 , B32B2571/02 , B32B2605/18 , B64C2001/0072
摘要： A method is provided of operating a single unducted rotor engine, the single unducted rotor engine comprising a single stage of unducted rotor blades. The method includes operating the single unducted rotor engine to define a flight speed, V0, in a length unit per second and an angular speed, n, in revolutions per second, the single stage of unducted rotor blades defining a diameter, D, in the length unit; wherein operating the single unducted rotor engine comprises operating the single unducted rotor engine to define an advance ratio greater than 3.8 while operating the single unducted rotor engine at a net efficiency of at least 0.8, the advance ratio defined by the equation V0/(n×D).
-
公开(公告)号：US11753144B2
公开(公告)日：2023-09-12
申请号：US17503195
申请日：2021-10-15
发明人： Daniel L. Tweedt , Syed Arif Khalid
CPC分类号： B64C11/48 , F01D9/02 , F05D2220/323 , F05D2220/325
摘要： Apparatuses and systems are provided herein for unducted propulsion systems. The system includes a forward housing for high efficiency for high subsonic sustained flight. A plurality of blades are affixed to the forward housing, wherein the forward housing defines a flowpath curve extending from the forward-most end of the forward housing through the axial extent of a forward blade root. The flowpath curve is described by an axial direction parallel to an axis of rotation and a radius from the axis of rotation. The flowpath curve includes a first point having a first radius where the radius reaches a maximum forward of the forward blade root and a second point aft of the first point having a second radius where the radius stops decreasing. The ratio of the first radius to the second radius is greater than or equal to 1.029.
-
公开(公告)号：US20230124580A1
公开(公告)日：2023-04-20
申请号：US17503195
申请日：2021-10-15
发明人： Daniel L. Tweedt , Syed Arif Khalid
摘要： Apparatuses and systems are provided herein for unducted propulsion systems. The system includes a forward housing for high efficiency for high subsonic sustained flight. A plurality of blades are affixed to the forward housing, wherein the forward housing defines a flowpath curve extending from the forward-most end of the forward housing through the axial extent of a forward blade root. The flowpath curve is described by an axial direction parallel to an axis of rotation and a radius from the axis of rotation. The flowpath curve includes a first point having a first radius where the radius reaches a maximum forward of the forward blade root and a second point aft of the first point having a second radius where the radius stops decreasing. The ratio of the first radius to the second radius is greater than or equal to 1.029.
-
公开(公告)号：US11352132B2
公开(公告)日：2022-06-07
申请号：US16042141
申请日：2018-07-23
摘要： A lift fan apparatus includes: a rotor having at least one rotatable hub carrying at least one row of blades; a duct surrounding the rotor, the duct including spaced-apart peripheral walls extending between an inlet and an exit, the peripheral walls collectively defining a flow channel which includes a diffuser disposed downstream of the rotor, in which a flow area at the exit is greater than a flow area at the rotor; and a plurality of spaced-apart splitters disposed in the diffuser, each of the splitters having opposed side walls extending between an upstream leading edge and a downstream trailing edge, wherein the splitters divide the diffuser into a plurality of side-by-side flow passages.
-
公开(公告)号：US11286955B2
公开(公告)日：2022-03-29
申请号：US16599459
申请日：2019-10-11
摘要： A ducted fan is provided including a fan casing surrounding a plurality of fan blades mounted to a rotating drive shaft. The plurality of blades define a tip stagger angle of greater than 68 degrees and the fan casing defines an annular recess defined by an inner wall of the fan casing, the annular recess extending about the circumferential direction proximate a blade tip of each of the plurality of blades. The annular recess may define an average recess depth greater than 10 percent of the tip chord length. The annular recess may also define a length ratio equal to a recess length over the tip axial chord length that is greater than 1.5.
-
公开(公告)号：US20230322360A1
公开(公告)日：2023-10-12
申请号：US18205794
申请日：2023-06-05
发明人： Daniel L. Tweedt , Syed Arif Khalid
CPC分类号： B64C11/48 , F01D9/02 , F05D2220/325 , F05D2220/323
摘要： Apparatuses and systems are provided herein for unducted propulsion systems. The system includes a forward housing for high efficiency for high subsonic sustained flight. A plurality of blades are affixed to the forward housing, wherein the forward housing defines a flowpath curve extending from the forward-most end of the forward housing through the axial extent of a forward blade root. The flowpath curve is described by an axial direction parallel to an axis of rotation and a radius from the axis of rotation. The flowpath curve includes a first point having a first radius where the radius reaches a maximum forward of the forward blade root and a second point aft of the first point having a second radius where the radius stops decreasing. The ratio of the first radius to the second radius is greater than or equal to 1.029.
-
-
-
-
-
-
-
-
-
搜索结果
29 条记录 (耗时 0.018 秒)
