Modification of fluid flow about bodies and surfaces through virtual aero-shaping of airfoils with synthetic jet actuators

    公开(公告)号:US06644598B2

    公开(公告)日:2003-11-11

    申请号:US10094194

    申请日:2002-03-08

    IPC分类号: B64C2108

    摘要: The present invention involves a system for altering the aerodynamic shape and/or fluid flow about a solid body. The preferred embodiment comprises an obstruction disposed on the solid body and extending outwardly from the solid body into the fluid flowing over the solid body and a synthetic jet actuator embedded in the solid body such that said fluid flowing over the solid body encounters the obstruction before the synthetic jet actuator. The synthetic jet actuator includes a jet housing defined by walls, the jet housing having an internal chamber with a volume of fluid and an opening in the jet housing connecting the chamber to an external environment having the fluid, and a volume changing means for periodically changing the volume within the internal chamber so that a series of fluid vortices are generated and projected in the external environment out from the opening of the jet housing. A synthetic jet stream is formed by the fluid vortices entraining the fluid of the external environment and is projected outwardly from the solid body. The fluid flowing over the solid body contacts the synthetic jet stream forming a recirculation region, thereby modifying both the flow field and the pressure distribution and similarly modifying both the lift and drag characteristics of the solid body.

    Apparatus and method for enhancement of aerodynamic performance by using pulse excitation control
    2.
    发明授权
    Apparatus and method for enhancement of aerodynamic performance by using pulse excitation control 失效
    使用脉冲激励控制提高空气动力性能的装置和方法

    公开(公告)号:US06412732B1

    公开(公告)日:2002-07-02

    申请号:US09610896

    申请日:2000-07-06

    IPC分类号: B64C2108

    摘要: One aspect of the apparatus disclosed herein is a system for modifying an aerodynamic property of an aerodynamic surface in a fluid flow. The fluid flow could comprise a free stream fluid flow, or an internal fluid flow, such as in a nozzle, diffuser, or compressor. The system of the preferred embodiment comprises a synthetic jet actuator embedded in an aerodynamic surface. In one aspect, the aerodynamic surface may be a wing. The synthetic jet actuator typically has a jet housing defining a chamber, where the chamber is in fluid communication with the fluid. This fluid communication may be accomplished via an orifice in a wall of the housing. Additionally, a portion of said housing is preferably moveable such that the volume of the chamber can be adjusted. The system also comprises a device for changing the position of the moveable portion of the housing at a predefined frequency. In this way, the synthetic jet actuator is pulse modulated in order to enhance the synthetic jet actuator's performance. In another aspect, the invention may be seen as a method of controlling a synthetic jet actuator. The method preferably comprises the steps of driving a synthetic jet actuator at a first frequency and turning the synthetic jet actuator on and off at a second frequency. The synthetic jet actuator interacting with a fluid flow to alter the fluid flow field.

    摘要翻译: 本文公开的装置的一个方面是用于改变流体流动中的空气动力学表面的空气动力特性的系统。 流体流可以包括自由流体流动或内部流体流动,例如在喷嘴,扩散器或压缩机中。 优选实施例的系统包括嵌入在空气动力学表面中的合成射流致动器。 在一个方面,空气动力学表面可以是翼。 合成射流致动器通常具有限定腔室的射流壳体,其中腔室与流体流体连通。 这种流体连通可以通过壳体的壁中的孔口来实现。 此外,所述壳体的一部分优选地可移动,使得可以调节腔室的体积。 该系统还包括用于以预定频率改变壳体的可移动部分的位置的装置。 以这种方式,合成射流致动器被脉冲调制以增强合成射流致动器的性能。 在另一方面,本发明可以被看作是控制合成射流致动器的方法。 该方法优选地包括以第一频率驱动合成射流致动器并以第二频率转动合成射流致动器的步骤。 合成射流致动器与流体流相互作用以改变流体流场。

    Apparatus and method for enhanced heat transfer
    4.
    发明申请
    Apparatus and method for enhanced heat transfer 有权
    用于增强传热的装置和方法

    公开(公告)号:US20060050482A1

    公开(公告)日:2006-03-09

    申请号:US11217759

    申请日:2005-09-01

    IPC分类号: H05K7/20

    CPC分类号: H05K7/20172 Y10S165/908

    摘要: One embodiment of the cooling module is implemented as a device having a heat sink and an integrated synthetic jet actuator. The heat sink is configured to have a channel and a jet distribution system associated with the synthetic jet actuator directs fluid flow into the channel of the heat sink. In operation, the fluid flow of this embodiment of the cooling module comprises a synthetic jet stream and ambient fluid entrained into the channel by the synthetic jet stream. The fluid flowing through the channel serves to a wall of the heat sink channel.

    摘要翻译: 冷却模块的一个实施例被实现为具有散热器和集成合成射流致动器的装置。 散热器被配置成具有与合成射流致动器相关联的通道和喷射分配系统将流体流引导到散热器的通道中。 在操作中,冷却模块的该实施例的流体流动包括由合成喷射流夹带到通道中的合成射流和环境流体。 流过通道的流体用于散热器通道的壁。

    Centimeter-scale, integrated diagnostics incubator for biological culturing
    8.
    发明授权
    Centimeter-scale, integrated diagnostics incubator for biological culturing 有权
    用于生物培养的厘米级综合诊断培养箱

    公开(公告)号:US07855070B2

    公开(公告)日:2010-12-21

    申请号:US11483126

    申请日:2006-07-07

    IPC分类号: C12M1/00 C12M3/00

    摘要: Disclosed are portable, disposable, centimeter-scale, integrated diagnostics incubators for use in biological culturing. An exemplary incubator comprises an optically accessible enclosure having a plurality of fluidic ports. A heating element is disposed within the enclosure that is coupled to an external heater controller. An autoclavable microfluidic perfusion chamber is disposed within the enclosure that comprises a cell culture life support chamber, an inlet port disposed in the perfusion chamber, a collection chamber in communication with the culture chamber, an outlet port coupled to the collection pool, and a perfusing substrate. An optically transparent, gas permeable membrane is attachable to the top of the perfusion chamber. The incubators have optical accessibility, forced flow fluidic control, temperature control, are portable and modular, and are inexpensively manufactured. The incubators permit in-the-field drug testing and culturing of biological tissues.

    摘要翻译: 公开了用于生物培养的便携式,一次性,厘米级的综合诊断培养箱。 示例性的培养箱包括具有多个流体端口的可光学访问的外壳。 加热元件设置在外壳内,其耦合到外部加热器控制器。 可灭菌的微流体灌注室设置在外壳内,其包括细胞培养寿命支持室,设置在灌注室中的入口端口,与培养室连通的收集室,连接到收集池的出口端口和灌注 基质。 透光透气膜可连接到灌注腔的顶部。 孵化器具有光学可及性,强制流动流体控制,温度控制,便携式和模块化,并且经济实惠。 孵化器允许现场药物检测和培养生物组织。

    Flow Manipulation in Biological Flows Using Vortex Generators
    10.
    发明申请
    Flow Manipulation in Biological Flows Using Vortex Generators 有权
    使用涡流发生器的生物流中的流动操作

    公开(公告)号:US20080121046A1

    公开(公告)日:2008-05-29

    申请号:US11940497

    申请日:2007-11-15

    IPC分类号: G01F1/32

    摘要: A device for use in combination with a fluid flow having a biologic component and subject to an adverse response to shear stress includes a surface in contact with the flow of the fluid. The surface has a longitudinal direction extending from a leading end toward a trailing end and aligned with a direction of the flow. The surface is susceptible to inducing boundary layer formation within the flow sufficient for a resulting shear stress to induce the response. The surface includes a surface feature sufficient to induce boundary layer tripping in the flow to retard growth of boundary layer formation along the length.

    摘要翻译: 与具有生物组分并受到对剪切应力的不利响应的流体流组合使用的装置包括与流体流接触的表面。 表面具有从前端向后端延伸并与流动方向对准的纵向方向。 该表面易于在流体内引起边界层形成,足以使得到的剪切应力引起响应。 表面包括足以在流动中引起边界层跳动以阻止沿着该长度的边界层形成的生长的表面特征。