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公开(公告)号：US20240391584A1
公开(公告)日：2024-11-28
申请号：US18669673
申请日：2024-05-21
Inventor： Subrata Roy , Alexander Lilley , Miguel Visbal
Abstract: The present disclosure presents systems and methods for dynamic stall control in aircrafts. One such method involves positioning one or more counter-flow point embedded electrode plasma actuator devices on an edge of an airfoil of an aircraft, wherein a counter-flow point embedded electrode plasma actuator device comprises at least a first electrode that is unexposed and embedded under a surface of the airfoil and a second electrode positioned on or in a top surface of the airfoil; and/or activating the one or more counter-flow point embedded electrode plasma actuator devices during a flight of the aircraft, wherein a dynamic stall angle of a pitching airfoil is increased during the flight of the aircraft by forcing plasma over the edge of the pitching airfoil.
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公开(公告)号：US20230137457A1
公开(公告)日：2023-05-04
申请号：US17916292
申请日：2021-03-31
Inventor： Subrata Roy , Sarthak Roy
Abstract: The present disclosure presents systems, apparatuses, and methods of active flow controls for dissipating tip vortices. In this regard, a method comprises positioning one or more fan-shaped plasma actuators on an end surface of a tip of one or more airfoils of an aircraft, wherein the fan-shaped plasma actuators are surface compliant with the surface of the tip of the one or more airfoils; and activating the one or more fan-shaped plasma actuators during a flight of the aircraft, wherein at least one tip vortex generated by a flight of the aircraft is reduced by an introduction of one or more vortices generated by the one or more fan-shaped plasma actuators on the end surface of the tip of the one or more airfoils of the aircraft. Other systems, apparatuses, and methods are also presented.
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公开(公告)号：US20180007772A1
公开(公告)日：2018-01-04
申请号：US15707322
申请日：2017-09-18
Inventor： Subrata Roy
IPC: H05H1/24
CPC classification number: H05H1/2406 , H05H2001/2412 , H05H2001/2468
Abstract: Various embodiments relate to plasma actuators that generate fluidic flow. In one or more embodiments, a plasma actuator includes a first electrode and a second electrode. A dielectric film physically separates the first electrode and the second electrode of the plasma actuator. The dielectric film is configured to be attached to a surface to facilitate the plasma actuator providing fluidic flow for an environment. A method of using the dielectric film can include attaching the dielectric film to a surface of a machine, applying a voltage across electrodes of the dielectric film, and moving the machine based on an electrohydrodynamic (EHD) body force produced by the dielectric film.
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公开(公告)号：US09774239B2
公开(公告)日：2017-09-26
申请号：US14368217
申请日：2012-12-24
Inventor： Raul Andres Chinga , Karl R. Zawoy , Subrata Roy , Jenshan Lin
CPC classification number: H02M1/08 , H01J37/32348 , H02M7/44 , H02M7/53803 , H02M2001/0003 , H02M2007/4815 , H05H1/46 , H05H2001/4682 , Y02B70/1441 , Y10T307/406
Abstract: Embodiments of the subject invention are drawn to power supply units and systems for supplying power to loads. Specific embodiments relate to systems incorporating the loads. The power supply units and systems can include a feedback mechanism for monitoring the system and maintaining a parameter of interest at or near a desired value (e.g., for maintaining the frequency of operation at or near resonance). The feedback mechanism is configured such that, if the at least one parameter indicates that the frequency of operation is away from a resonant frequency of the power amplifier, the feedback mechanism adjusts the frequency of operation closer to the resonant frequency of the power amplifier. The at least one load can have a variable impedance, though embodiments are not limited thereto.
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公开(公告)号：US10378565B2
公开(公告)日：2019-08-13
申请号：US15511034
申请日：2015-09-29
Inventor： Subrata Roy , Nicholas S. Campbell
Abstract: The present disclosure is directed towards electro-fluid transducers that may influence the flow of a fluid in and around a channel. In one such embodiment, a system comprises a first electrode at least partially encapsulated by a first dielectric; a second electrode at least partially encapsulated by a second dielectric, wherein a portion of a channel exists between the first dielectric and the second dielectric; a third electrode positioned in the channel; and a fourth electrode positioned in the channel, wherein the electrodes influence a flow of a fluid in the channel upon the electrodes being energized.
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Patent Agency Ranking
公开(公告)号：US10285254B2
公开(公告)日：2019-05-07
申请号：US15707322
申请日：2017-09-18
Inventor： Subrata Roy
IPC: H05H1/24
Abstract: Various embodiments relate to plasma actuators that generate fluidic flow. In one or more embodiments, a plasma actuator includes a first electrode and a second electrode. A dielectric film physically separates the first electrode and the second electrode of the plasma actuator. The dielectric film is configured to be attached to a surface to facilitate the plasma actuator providing fluidic flow for an environment. A method of using the dielectric film can include attaching the dielectric film to a surface of a machine, applying a voltage across electrodes of the dielectric film, and moving the machine based on an electrohydrodynamic (EHD) body force produced by the dielectric film.
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公开(公告)号：US20140346875A1
公开(公告)日：2014-11-27
申请号：US14368217
申请日：2012-12-24
Inventor： Raul Andres Chinga , Karl R. Zawoy , Subrata Roy , Jenshan Lin
CPC classification number: H02M1/08 , H01J37/32348 , H02M7/44 , H02M7/53803 , H02M2001/0003 , H02M2007/4815 , H05H1/46 , H05H2001/4682 , Y02B70/1441 , Y10T307/406
Abstract: Embodiments of the subject invention are drawn to power supply units and systems for supplying power to loads. Specific embodiments relate to systems incorporating the loads. The power supply units and systems can include a feedback mechanism for monitoring the system and maintaining a parameter of interest at or near a desired value (e.g., for maintaining the frequency of operation at or near resonance). The feedback mechanism is configured such that, if the at least one parameter indicates that the frequency of operation is away from a resonant frequency of the power amplifier, the feedback mechanism adjusts the frequency of operation closer to the resonant frequency of the power amplifier. The at least one load can have a variable impedance, though embodiments are not limited thereto.
Abstract translation: 本发明的实施例涉及用于向负载供电的供电单元和系统。 具体实施例涉及包含负载的系统。 电源单元和系统可以包括用于监视系统并将感兴趣的参数维持在或接近期望值的反馈机制（例如，用于维持在或接近共振的操作频率）。 反馈机构被配置为使得如果至少一个参数指示操作频率远离功率放大器的谐振频率，则反馈机构调节操作频率更接近功率放大器的谐振频率。 至少一个负载可以具有可变阻抗，尽管实施例不限于此。
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公开(公告)号：US10646605B2
公开(公告)日：2020-05-12
申请号：US15698795
申请日：2017-09-08
Inventor： Subrata Roy , Karl Zawoy
Abstract: Embodiments of the invention relate to a method and apparatus for self-sterilizing a surface or other portion of the apparatus and/or sterilizing other objects. Embodiments can utilize self-generated and/or remotely controlled plasma fields for the purpose of self-sterilization and/or sterilization of another object. Embodiments of the invention can have broad applications in procedures and equipment requiring the sterility of devices used for medical procedures, decontamination procedures, drug delivery, sterility of consumer products, and sterility of food preparation equipment and tools.
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公开(公告)号：US10987640B2
公开(公告)日：2021-04-27
申请号：US16713445
申请日：2019-12-13
Inventor： Subrata Roy
Abstract: Embodiments of the subject invention are directed to methods and apparatus for inducing mixing in a fluid using one or more plasma actuators. In an embodiment, a pair of electrodes is positioned near a fluid and a voltage potential is applied across the pair of electrodes such that a plasma discharge is produced in the fluid. In an embodiment, the plasma discharge creates turbulence in the fluid thereby mixing the fluid. In an embodiment, flow structures, such as vortices are generated in the fluid. In an embodiment, the fluid is mixed in three dimensions. In an embodiment, a plurality of fluids are mixed. In an embodiment, solids are dispersed in at least one fluid. In an embodiment, heat or other properties are dispersed within at least one fluid. In an embodiment, at least one of the pair of electrodes has a serpentine shape.
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公开(公告)号：US10788062B2
公开(公告)日：2020-09-29
申请号：US16395767
申请日：2019-04-26
Inventor： Subrata Roy , Nicholas S. Campbell
Abstract: The present disclosure is directed towards electro-fluid transducers that may influence the flow of a fluid in and around a channel. In one such embodiment, a system comprises a first electrode at least partially encapsulated by a first dielectric; a second electrode at least partially encapsulated by a second dielectric, wherein a portion of a channel exists between the first dielectric and the second dielectric; a third electrode positioned in the channel; and a fourth electrode positioned in the channel, wherein the electrodes influence a flow of a fluid in the channel upon the electrodes being energized.
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