利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

9 条记录 (耗时 0.013 秒)

    Method and apparatus for reducing turbulent drag
    1.
    发明申请
    Method and apparatus for reducing turbulent drag 失效
    减少湍流阻力的方法和装置

    公开(公告)号：US20020125376A1

    公开(公告)日：2002-09-12

    申请号：US10054235

    申请日：2001-11-13

    发明人： George Em Karniadakis ,  Kenneth Breuer ,  Vasileios Symeonidis

    IPC分类号： B64C021/00

    CPC分类号： F15D1/12 ,  B06B1/0622 ,  B63B1/34 ,  B63B2001/327 ,  B64C23/005 ,  B64C23/04 ,  B64C2230/12 ,  F05D2270/172 ,  Y02T50/166 ,  Y02T70/12 ,  Y02T70/121

    摘要： The systems and methods of the invention include systems and techniques for controlling a turbulent boundary layer flow with a transverse traveling wave, oscillating at certain selected frequencies, amplitudes and wavelengths, to provide substantial reductions of drag. To this end, the systems and processes can include a boundary layer control system having an object with at least one surface exposed to a medium flowing over the surface. A plurality of excitation elements may be arranged on the surface and these elements are capable of exciting a traveling wave force field in a span-wise direction that is substantially parallel to the surface and perpendicular to direction of the flow. A first component of the traveling wave force field in the span-wise direction is substantially greater than a second component of the traveling wave force field, that is substantially perpendicular to the span-wise direction.

    摘要翻译： 本发明的系统和方法包括用于利用横向行波控制湍流边界层流动的系统和技术，以某些选定的频率，振幅和波长振荡，以提供显着的减小阻力。 为此，系统和过程可以包括具有物体的边界层控制系统，其中至少一个表面暴露于在表面上流动的介质。 多个激励元件可以布置在表面上，并且这些元件能够激发基本上平行于表面并垂直于流动方向的跨度方向上的行波力场。 沿跨度方向的行波力场的第一分量基本上大于行进波力场的第二分量，其大致垂直于跨度方向。

    Active drag and thrust modulation system and method
    2.
    发明申请
    Active drag and thrust modulation system and method 有权
    主动阻力和推力调制系统及方法

    公开(公告)号：US20040084569A1

    公开(公告)日：2004-05-06

    申请号：US10386992

    申请日：2003-03-12

    发明人： Peter M. Bonutti

    IPC分类号： B64C021/00

    CPC分类号： F15D1/0075 ,  B60C19/00 ,  B62D35/00 ,  B63B1/34 ,  B63B2039/068 ,  B63H9/04 ,  B63H9/06 ,  B64C23/005 ,  B64C2230/02 ,  F02B2075/125 ,  F02M27/08 ,  F02M69/041 ,  F15D1/12 ,  Y02T10/123 ,  Y02T50/166 ,  Y02T70/121 ,  Y02T70/583 ,  Y10T137/0391 ,  Y10T137/206 ,  Y10T137/2191

    摘要： A vehicle traveling through an environmental media such as air experiences drag. The drag is actively modulated by energy beams which may either increase or decrease the drag. The energy beams may provide either a chemical, acoustic or electromagnetic energy at a transition region between turbulent and laminar flows or at the leading edge of a laminar flow or in the direction of a crosswind in order to facilitate the respective increase or decrease in drag. If the vehicle is a sailing ship, areas of the sails are selectively roughened or widened to enhance the thrust derived from the wind. Furthermore, the keel or hull of the sailing ship may be modified to improve the hydrodynamic characteristics of the sailing ship. If the vehicle is an automobile, the tires or road surface may be selectively heated to improve the traction of the automobile. Furthermore, the energy beams may be used to facilitate atomization of the air/fuel mixture prior to combustion in an internal combustion engine thereby improving the thrust of provided to the vehicle. Energy beams may be used to generate virtual extensions of a vehicle to enhance traveling efficiency.

    摘要翻译： 穿过诸如空气等环境媒体的车辆经历拖累。 该阻力由能量束主动调制，能量束可能增加或减少阻力。 能量束可以在湍流和层流之间的过渡区域处或在层流的前缘处或在侧风方向上提供化学，声学或电磁能，以便于相应地增加或减小阻力。 如果车辆是帆船，则帆的区域被选择性地粗糙化或加宽，以增强来自风的推力。 此外，可以修改帆船的龙骨或船体以改善帆船的流体动力特性。 如果车辆是汽车，则可以选择性地加热轮胎或路面以改善汽车的牵引力。 此外，能量束可以用于在燃烧内燃机之前促进空气/燃料混合物的雾化，从而改善提供给车辆的推力。 能量束可用于产生车辆的虚拟延伸以提高行驶效率。

    Method and system for regulating external fluid flow over an object's surface, and particularly a wing and diffuser
    3.
    发明申请
    Method and system for regulating external fluid flow over an object's surface, and particularly a wing and diffuser 失效
    用于调节物体表面上的外部流体流动的方法和系统，特别是翼和扩散器

    公开(公告)号：US20040104309A1

    公开(公告)日：2004-06-03

    申请号：US10600207

    申请日：2003-06-19

    发明人： Darko Segota ,  John W. Finnegan II

    IPC分类号： B64C021/00

    CPC分类号： F15D1/12 ,  B63B1/248 ,  B63B1/36 ,  B63B2001/202 ,  B63G2013/022 ,  B63H1/28 ,  B64C21/02 ,  B64C23/005 ,  B64C2003/148 ,  F15D1/0045 ,  Y02T50/12 ,  Y02T50/166 ,  Y02T70/121

    摘要： The present invention features a fluid flow regulator that functions to significantly influence fluid flow across the surface of an object, as well as to significantly effect the performance of the object subjected to the fluid. The fluid flow regulator comprises a pressure recovery drop that induces a sudden drop in pressure at an optimal pressure recovery point on said surface, such that a sub-atmospheric barrier is created that serves as a cushion between the molecules in the fluid and the molecules at the object's surface. More specifically, the present invention fluid flow regulator functions to significantly regulate the pressure gradients that exist along the surface of an object subject to fluid flow. Regulation of pressure gradients is accomplished by selectively reducing the pressure drag at various locations along the surface, as well as the pressure drag induced forward and aft of the object, via the pressure recovery drop. Reducing the pressure drag in turn increases pressure recovery or pressure recovery potential, which pressure recovery subsequently lowers the friction drag along the surface. By reducing or lowering friction drag, the potential for fluid separation is decreased, or in other words, attachment potential of the fluid is significantly increased. All of these effects may be appropriately and collectively phrased and referred to as optimization of fluid flow, wherein the fluid flow, its properties and characteristics (e.g., separation, boundary layer), and relationship to the object are each optimized. The present invention is specifically applicable to wings, wing-like structures (e.g. stabilizers and rudders), and diffusers.

    摘要翻译： 本发明的特征在于一种流体流量调节器，其功能是显着影响穿过物体表面的流体流动，并且显着影响受到流体的物体的性能。 流体流量调节器包括压力恢复液滴，其在所述表面上的最佳压力恢复点处引起压力的突然下降，使得产生亚大气压屏障，其用作流体中的分子和分子之间的缓冲 物体表面。 更具体地，本发明的流体流量调节器用于显着调节沿着流体流动的物体表面存在的压力梯度。 压力梯度的调节是通过选择性地减小沿着表面的各个位置处的压力阻力以及通过压力恢复下降引起的物体的前后的压力阻力来实现的。 降低压力阻力又增加了压力恢复或压力恢复电位，该压力恢复随后降低了沿表面的摩擦阻力。 通过减少或降低摩擦阻力，降低了流体分离的可能性，或者换句话说，流体的附着电位显着增加。 所有这些效果可以适当地和集体地表达，并且被称为流体流动的优化，其中流体流动，其性质和特性（例如，分离，边界层）以及与物体的关系被优化。 本发明特别适用于机翼，翼状结构（例如稳定器和方向舵）和扩散器。

    Turbulent flow drag reduction
    5.
    发明申请
    Turbulent flow drag reduction 失效
    湍流减阻

    公开(公告)号：US20040195463A1

    公开(公告)日：2004-10-07

    申请号：US10474006

    申请日：2003-10-09

    发明人： Simon J Scott ,  Graham A Johnson

    IPC分类号： B64C021/00

    CPC分类号： B64C23/005 ,  Y02T50/166

    摘要： The present invention relates to apparatus for influencing fluid flow over a surface, and more particularly, but not exclusively, to turbulent boundary layer flow drag reduction for an aircraft. The present invention provides such apparatus including a plasma generator comprising a first electrode (7) and a signal generator (18), the apparatus being operable to drive the first electrode (7) with a pulsed signal generated by the signal generator (18) thereby to cause a change in direction of the flow of the fluid over the surface.

    摘要翻译： 本发明涉及用于影响流体在表面上流动的装置，更具体地但不排他地涉及用于飞行器的湍流边界层流动减阻。 本发明提供了一种包括等离子体发生器的装置，其包括第一电极（7）和信号发生器（18），该装置可操作以用信号发生器（18）产生的脉冲信号驱动第一电极（7） 以引起流体在表面上的流动方向的改变。

    Reconfigurable porous technology for fluid flow control and method of controlling flow
    6.
    发明申请
    Reconfigurable porous technology for fluid flow control and method of controlling flow 失效
    用于流体流量控制的可重构多孔技术和控制流量的方法

    公开(公告)号：US20040129839A1

    公开(公告)日：2004-07-08

    申请号：US10336113

    申请日：2003-01-03

    发明人： Mehul P. Patel ,  Jack M. DiCocco ,  Troy Prince

    IPC分类号： B64C021/00

    CPC分类号： F16K99/0001 ,  B64C21/025 ,  B64C21/08 ,  B64C2230/06 ,  B64C2230/22 ,  F15C5/00 ,  F15D1/12 ,  F16K99/0011 ,  F16K99/0051 ,  F16K2099/0082 ,  F42B10/668 ,  Y02T50/166

    摘要： The present invention relates to a reconfigurable porous technology for fluid flow control system and more particularly to reconfigurable porosity fluid flow control system for vehicles such as aircraft, missiles, ground and water vehicles to improve the performance of such vehicles. The present invention further relates to a method of operating the reconfigurable fluid flow control system. In one embodiment, the present invention includes a reconfigurable porosity system for fluid flow control on the surface of an aircraft, missile, water-craft or ground vehicle comprising a porous outer skin comprising individual pores; individually addressable valves corresponding and connected to the individual pores for opening and closing the pores; and a pneumatic system for connecting the pores wherein fluid from a high pressure area of the porous outer skin can be directed to a low pressure area of the porous outer skin by opening and closing the individually addressable valves. In another embodiment, the present invention includes a method of fluid flow control using reconfigurable porosity.

    摘要翻译： 本发明涉及一种用于流体流动控制系统的可重构多孔技术，更具体地涉及用于诸如飞机，导弹，地面和水车辆的车辆的可重构孔隙度流体流量控制系统，以改善这种车辆的性能。 本发明还涉及一种操作可重构流体流量控制系统的方法。 在一个实施例中，本发明包括用于在飞机，导弹，水上工艺或地面车辆的表面上进行流体流动控制的可重新配置的孔隙系统，其包括包括单个孔的多孔外皮; 对应并连接到用于打开和关闭孔的各个孔的单独可寻址阀; 以及用于连接孔的气动系统，其中来自多孔外皮的高压区域的流体可以通过打开和关闭单独可寻址的阀而被导向多孔外皮的低压区域。 在另一个实施例中，本发明包括使用可重新配置的孔隙率的流体流量控制的方法。

    Active drag modulation system and method
    7.
    发明申请
    Active drag modulation system and method 有权
    主动拖曳调制系统及方法

    公开(公告)号：US20040084568A1

    公开(公告)日：2004-05-06

    申请号：US10287379

    申请日：2002-11-04

    发明人： Peter M. Bonutti

    IPC分类号： B64C021/00

    CPC分类号： B63B1/34 ,  B63B2039/068 ,  B63H9/06 ,  B64C23/005 ,  B64C2230/02 ,  F15D1/12 ,  Y02T50/166 ,  Y02T70/121 ,  Y02T70/583

    摘要： A vehicle traveling through an environmental media such as air experiences drag. The drag is actively modulated by energy beams which may either increase or decrease the drag. The energy beams may be ultrasonic and provide acoustic energy at a transition region between turbulent and laminar flows or at the leading edge of a laminar flow in order to facilitate the respective increase or decrease in drag. The ultrasonic beams may be placed at various locations of an aircraft in order to provide some flight control. The ultrasonic beams may be placed on an automobile to facilitate desired operating modes of the vehicle. The ultrasonic beams may be a further component of a parametric array for communicating audio signals ahead and behind the vehicle in addition to drag modulation.

    摘要翻译： 穿过诸如空气等环境媒体的车辆经历拖累。 该阻力由能量束主动调制，能量束可能增加或减少阻力。 能量束可以是超声波，并且在湍流和层流之间的过渡区域或层流的前缘处提供声能，以便于相应地增加或减少阻力。 超声波束可以放置在飞机的各个位置，以提供一些飞行控制。 超声波束可以放置在汽车上以便于车辆的所需操作模式。 超声波束可以是除了拖动调制之外还用于在车辆前方和后方传送音频信号的参数阵列的另外的分量。

    Non-linear axisymmetric potential flow boundary model for partially cavitating high speed bodies
    8.
    发明申请
    Non-linear axisymmetric potential flow boundary model for partially cavitating high speed bodies 失效
    用于部分气蚀高速物体的非线性轴对称电位流动边界模型

    公开(公告)号：US20030019978A1

    公开(公告)日：2003-01-30

    申请号：US09874306

    申请日：2001-06-07

    发明人： Abraham N. Varghese ,  James S. Uhlman

    IPC分类号： B64C021/00

    CPC分类号： F15D1/10 ,  B63B9/002

    摘要： A method for calculating parameters about an axisymmetric body in a cavity is provided. The user provides data describing the body, a cavity estimate, and convergence tolerances. Boundary element panels are distributed along the body and the estimated cavity. Matrices are initialized for each panel using disturbance potentials and boundary values. Disturbance potential matrices are formulated for each panel using disturbance potential equations and boundary conditions. The initialized matrices and the formulated matrices are solved for each boundary panel to obtain panel sources, dipoles and cavitation numbers. Forces and velocities are computed giving velocity and drag components. The cavity shape is updated by moving each panel in accordance with the calculated values. The method then tests for convergence against a tolerance, and iterates until convergence is achieved. Upon completion, parameters of interest and the cavity shape are provided. This invention also allows determiniation of cavity shape for a cavitation number.

    摘要翻译： 提供了一种用于计算空腔中的轴对称体的参数的方法。 用户提供描述身体的数据，腔体估计和收敛公差。 边界元件面板沿着身体和估计的腔体分布。 使用扰动电位和边界值对每个面板初始化矩阵。 使用扰动电位方程和边界条件为每个面板制定干扰电位矩阵。 为每个边界面板求解初始化矩阵和公式化矩阵，以获得面板源，偶极子和空化数。 计算出速度和阻力分量的力和速度。 通过根据计算值移动每个面板来更新空腔形状。 然后，该方法针对公差测试收敛，并且迭代直到达到收敛。 完成后，提供感兴趣的参数和腔体形状。 本发明还允许确定空化数的腔体形状。