公开(公告)号：US4786020A

公开(公告)日：1988-11-22

申请号：US149814

申请日：1988-01-29

申请人： Milton E. Franke ,  Lawrence Kudelka

发明人： Milton E. Franke ,  Lawrence Kudelka

IPC分类号： B64C23/00 ,  B64C21/00

CPC分类号： B64C23/00

摘要： A system is described for controlling the transition of laminar/turbulent flow at a surface which comprises a thin narrow strip heater disposed adjacent the surface and extending substantially transversely of the flow of the air stream thereacross, the heater being resiliently held in tension on or in closely spaced relationship to the surface, and a power source operatively connected to the heater for applying pulsed voltage of preselected amplitude and frequency to the heater.

摘要翻译： 描述了一种用于控制在表面处的层流/湍流的过渡的系统，该表面包括邻近表面设置的薄窄带加热器，并且基本横向地横跨在其间的空气流的横向延伸，加热器被弹性地保持在或 和与该加热器可操作地连接的电源，用于向加热器施加预选的幅度和频率的脉冲电压。

公开(公告)号：US4705240A

公开(公告)日：1987-11-10

申请号：US610094

申请日：1984-05-14

申请人： Charles J. Dixon

发明人： Charles J. Dixon

IPC分类号： B64C21/00 ,  B64C23/06

CPC分类号： B64C21/00 ,  B64C23/06 ,  Y02T50/162 ,  Y02T50/166

摘要： A method of applying and controlling vortex lift to a unique high-lift airfoil (29) is described wherein the planform of the airfoil (29) comprises a swept-forward outer panel (31) and a swept-aft or unswept inboard panel (33). A leading edge vortex (37) is formed on (31) and attached flow is maintained on (33). The attached flow on (33) causes the vortex (37) of the airfoil (29) to turn downstream and also induces axial flow along axis of vortex (37). Both of these results serve to delay vortex burst. A high-lift trailing edge device (45) such as a mechanical flap as the circulation control concept will induce a high leading edge flow angularity and cause the vortex (37) to grow in strength, thereby increasing vortex lift. The vortex (37) replaces the high-weight, high-lift leading device that would otherwise be required.

摘要翻译： 描述了对独特的高升力翼型件（29）施加和控制涡流升力的方法，其中翼型件（29）的平面形状包括扫掠的外部面板（31）和扫掠的或未清洁的内侧面板（33） ）。 （31）上形成一个前缘涡流（37），并且在（33）上保持连接的流动。 （33）上的附着流使翼型件（29）的涡流（37）向下游转动并且还沿涡流（37）的轴线引起轴向流动。 这两个结果都用于延迟涡流爆发。 作为循环控制概念的诸如机械挡板的高升力后缘装置（45）将引起高的前缘流动角度并使涡流（37）强度增长，从而增加涡流升力。 涡旋（37）取代了否则将要求的高重量，高升程的引导装置。

公开(公告)号：US4644806A

公开(公告)日：1987-02-24

申请号：US725963

申请日：1985-04-22

申请人： Elgin E. Flagg ,  Melvin Bobo

发明人： Elgin E. Flagg ,  Melvin Bobo

IPC分类号： B64D29/00 ,  B64C21/00 ,  B64D43/00 ,  F02C7/04 ,  G01N1/20

CPC分类号： F02C7/04 ,  B64C21/00 ,  G01K13/028 ,  Y02T50/166

摘要： In one form of the present invention, boundary layer air is diverted from a probe in an aircraft and freestream air is induced to impinge upon the probe.

摘要翻译： 在本发明的一种形式中，边界层空气从飞行器中的探头转向，并且引发自由流空气撞击探针。

公开(公告)号：US4033526A

公开(公告)日：1977-07-05

申请号：US667245

申请日：1976-03-15

申请人： William Benson

发明人： William Benson

IPC分类号： B64C21/00 ,  B64C15/02

CPC分类号： B64C21/00 ,  Y02T50/166

摘要： Disclosed is an increased lift aircraft or similar device having an airfoil shaped forward structure. A mass flow engine, such as a jet engine, is positioned to the rear of this structure. In operation, the intake air flow for the engine flows around the forward structure, generating lift.

摘要翻译： 公开了一种具有翼型正向结构的增加的提升飞机或类似装置。 诸如喷气发动机的质量流量发动机位于该结构的后部。 在操作中，发动机的进气流围绕正向结构流动，产生升力。

公开(公告)号：US3915412A

公开(公告)日：1975-10-28

申请号：US48824174

申请日：1974-07-12

申请人： TIBBS ROBERT C

发明人： TIBBS ROBERT C

IPC分类号： B64C21/00 ,  B64C21/08

CPC分类号： B64C21/00 ,  Y02T50/166

摘要： An aircraft having an airfoil provided with a plurality of openings on the upper lift surface thereof for directing an airflow over substantially the entire area of that surface. This flow decreases the pressure over the upper lift surface for creating lift forces sufficient to lift the aircraft. The size of the opening is varied by means of a selectively positionable, pivotal flap. A wall portion cooperating with the flap to form the opening may have one of several configurations including planar, a wedge, and an isosceles triangle with its apex adjacent the outer end of the flap. Further, an upper airfoil shaped member may be arranged at the lift surface of the airfoil adjacent the opening. Openings in various portions of the wings may be inversely positionable from symmetrically arranged openings for controlling the attitude of the aircraft. A propeller is arranged for ducting air to the openings. This propeller, which may be supplemented by at least one compressor stage, has variable and reversible pitch tips for selectively and variably providing thrust bidirectionally along the trust line of the aircraft. When positioned for reversed thrust, these tips will provide a thrust which counters any thrust created by air escaping from the openings and permit the aircraft to hover. The airfoil is also provided with passages therethrough arranged in symmetrically spaced portions thereof in parallel to the aircraft thrust line. These passages have valves associated therewith and arranged for selectively and inversely directing airflow from the passages for imparting a moment to the airfoil which permits turning of the aircraft.

摘要翻译： 具有在其上提升表面上设置有多个开口的翼型件的飞机用于引导基本上该表面的整个区域上的气流。 该流量降低了上升降面的压力，用于产生足以提升飞行器的升力。 通过可选择性定位的枢转翼片来改变开口的尺寸。 与翼片协作以形成开口的壁部分可以具有包括平面，楔形和等腰三角形的多个构造中的一个，其顶点邻近翼片的外端。 此外，上翼面形状构件可以布置在邻近开口的翼型件的提升表面处。 翼的各个部分的开口可以从对称布置的开口反向定位，以控制飞行器的姿态。 布置螺旋桨以将空气引导到开口。 该螺旋桨可以由至少一个压缩机级补充，具有可变和可逆的桨距，用于沿着飞机的信任线双向选择性地和可变地提供推力。 当定位用于反向推力时，这些尖端将提供一个推力，其抵抗由开口逸出的空气产生的任何推力，并允许飞机悬停。 机翼还设置有与飞行器推力线平行的对称地间隔的部分布置。 这些通道具有与其相关联的阀，并且布置成用于选择性地和反向地引导来自通道的气流，以便将翼片赋予允许飞行器转动的翼型。

公开(公告)号：US20240246689A1

公开(公告)日：2024-07-25

申请号：US18243049

申请日：2023-09-06

申请人： JETOPTERA, INC.

发明人： Andrei Evulet

IPC分类号： B64D33/04 ,  B64C9/38 ,  B64C15/00 ,  B64C15/14 ,  B64C21/00 ,  B64C21/04 ,  B64C23/00 ,  B64C39/02 ,  B64D27/10 ,  B64D27/18 ,  B64D29/02 ,  B64D33/02 ,  B64U30/00 ,  B64U30/10 ,  F02C3/04 ,  F02C6/04 ,  F02K1/00 ,  F02K1/36

CPC分类号： B64D33/04 ,  B64C9/38 ,  B64C15/00 ,  B64C15/14 ,  B64C21/00 ,  B64C21/04 ,  B64C23/00 ,  B64C23/005 ,  B64C39/024 ,  B64D27/10 ,  B64D27/18 ,  B64D29/02 ,  B64D33/02 ,  F02C3/04 ,  F02C6/04 ,  F02K1/002 ,  F02K1/36 ,  B64C2230/04 ,  B64C2230/06 ,  B64C2230/16 ,  B64D2033/0273 ,  B64U30/00 ,  B64U30/10 ,  F05D2220/90 ,  Y02T50/10 ,  Y02T50/30 ,  Y02T50/40

摘要： A propulsion system coupled to a vehicle. The system includes a convex surface, a diffusing structure coupled to the convex surface, and at least one conduit coupled to the convex surface. The conduit is configured to introduce to the convex surface a primary fluid produced by the vehicle. The system further includes an intake structure coupled to the convex surface and configured to introduce to the diffusing structure a secondary fluid accessible to the vehicle. The diffusing structure comprises a terminal end configured to provide egress from the system for the introduced primary fluid and secondary fluid.

公开(公告)号：US20230211873A1

公开(公告)日：2023-07-06

申请号：US17568677

申请日：2022-01-04

申请人： The Florida State University Research Foundation, Inc.

发明人： Fernando Zigunov ,  Farrukh Alvi

IPC分类号： B64C23/00 ,  B64C21/00

CPC分类号： B64C23/005 ,  B64C21/00

摘要： Systems and methods are provided for experimentally determining optimized placement and operating conditions, e.g., amplitude, phase, or frequency, of active flow control actuators by executing an optimization routine to sequentially activate varying subsets of active flow control actuators of a plurality of active flow control actuators spatially distributed within a flow field, calculating a cost function of each of the subsets of sequentially activated active flow control actuators based on respective measurements of one or more parameters, e.g., integral variables or proxies to the integral variables, within the flow field by one or more sensors, and determining an optimal subset of active flow control actuators based on the respective cost functions of each of the subsets of sequentially activated active flow control actuators.

公开(公告)号：US11692566B2

公开(公告)日：2023-07-04

申请号：US17938399

申请日：2022-10-06

申请人： Deep Science, LLC

发明人： Alexander J. Smits ,  Ivan Marusic ,  David Wine ,  Brian Holloway

IPC分类号： F15D1/12 ,  B64C23/00 ,  F15D1/00 ,  F15D1/06 ,  B62D35/00 ,  B64C9/02 ,  B64C9/04 ,  B64C21/00

CPC分类号： F15D1/12 ,  B64C23/005 ,  F15D1/007 ,  F15D1/065 ,  B62D35/00 ,  B64C9/02 ,  B64C9/04 ,  B64C21/00 ,  B64C2230/12 ,  F15D1/008

摘要： Systems and methods are described herein to implement transverse momentum injection at low frequencies to directly modify large-scale eddies in a turbulent boundary layer on a surface of an object. A set of transverse momentum injection actuators may be positioned on the surface of the object to affect large-scale eddies in the turbulent boundary layer. The system may include a controller to selectively actuate the transverse momentum injection actuators with an actuation pattern to affect the large-scale eddies to modify the drag of the fluid flow on the surface. In various embodiments, the transverse momentum injection actuators may be operated at frequencies less than 10,000 Hertz.

公开(公告)号：US20220363401A1

公开(公告)日：2022-11-17

申请号：US17319155

申请日：2021-05-13

申请人： BETA AIR, LLC

发明人： Herman Lucas Norbert Wiegman ,  Nathan William Joseph Wiegman ,  Lochie Ferrier ,  Riley Clinton Griffin

IPC分类号： B64D31/06 ,  B64C13/04 ,  B64D27/24 ,  B64C21/00

摘要： An aircraft having reverse thrust capabilities includes a fuselage, a plurality of flight components, a pilot control located within the fuselage, a sensor attached to the pilot control configured to detect an aircraft datum from the pilot control, and a flight controller, located within the fuselage, the flight controller configured to receive the aircraft datum from the sensor, and initiate a reverse torque command of a flight component of the plurality of flight components as a function of the aircraft datum.

公开(公告)号：US20220204168A1

公开(公告)日：2022-06-30

申请号：US17549799

申请日：2021-12-13

申请人： LIEBHERR-AEROSPACE TOULOUSE SAS

发明人： Vincent BALOCCHI

IPC分类号： B64D13/08 ,  B64D15/04 ,  B64C21/00

摘要： The invention relates to an air system for an aircraft, that includes air consumers; air sources and a network of ducts and associated control valves controlled by a control unit. The air system is characterized in that: the network of ducts and associated valves includes at least one isolation valve, arranged between an air bleed device and an air duct connecting an air conditioning pack and an auxiliary power unit; the control unit is configured to be able to determine an ideal configuration of the control valves according to the identified requirements of each consumer and a degraded configuration that makes it possible to supply air to predetermined air consumers from the available air sources when the ideal configuration is not attainable.