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    • 62. 发明公开
    • An element for generating a fluid dynamic force
    • 用于产生流体动力的元素
    • EP2316729A2
    • 2011-05-04
    • EP10182928.1
    • 2006-07-13
    • City University
    • Prince, SimonKhodagolian, Vahik
    • B64C23/06
    • B64C23/06B64C2230/06B64C2230/18B64C2230/20F03D1/0641F05D2240/30Y02E10/721Y02T50/162Y02T50/166
    • This invention relates to an element (11) for generating a fluid dynamic force, the element (11) comprising first (13) and second (15) surfaces extending in opposite directions from a leading edge (17) of the element (11) and meeting at a trailing edge (18) thereof to define a three dimensional body that is shaped to generate a fluid dynamic force when immersed at an angle of attack α to a fluid flow over the element (11) in a flow direction U, the first surface (13) comprising an array of fluid inlets (19) and the second surface (15) comprising a corresponding array of fluid outlets (21), each said inlet (19) being fluidly coupled to a said outlet (21) by means of a fluid duct (23) at least part of which is pitched at an angle θ to a tangent plane (Y—Y) to said second surface (15) in the vicinity of said outlet (21) and skewed at an angle ϕ to said fluid flow direction U, the arrangement being such that the element (11) is operable in use to generate a relatively high fluid pressure region downstream of said leading edge (17) proximate said first surface (13) and a relatively low fluid pressure region downstream of said leading edge (17) proximate said second surface (15), and fluid from said relatively high fluid pressure region is enabled to flow into said fluid inlets (19) through said fluid ducts (23) and out of said fluid outlets (21) into said relatively low pressure region to generate fluid vortices which reenergise said low pressure region and delay boundary layer separation from said second surface (15).
    • 本发明涉及用于产生流体动力的元件(11),元件(11)包括从元件(11)的前缘(17)沿相反方向延伸的第一表面(13)和第二表面(15),以及 在其后缘(18)处相遇以限定三维主体,所述三维主体被成形为当以在流动方向U上的元件(11)上的流体流以迎角α浸入时产生流体动力,第一 包括流体入口(19)阵列的第一表面(13)和包括流体出口(21)的相应阵列的第二表面(15),每个所述入口(19)通过流体连接到所述出口 流体通道(23),其至少一部分相对于在所述出口(21)附近的所述第二表面(15)的切平面(Y-Y)以角度θ倾斜并且以与所述出口 流体流动方向U,该布置使得元件(11)在使用中可操作以产生相对较高的流体压力 在所述前缘(17)的靠近所述第一表面(13)的下游和在所述前缘(17)的靠近所述第二表面(15)的下游的相对较低的流体压力区域,并且来自所述较高流体压力区域的流体是 能够通过所述流体通道(23)流入所述流体入口(19)并流出所述流体出口(21)进入所述较低压力区域,从而产生流体涡流,所述流体涡流重新激励所述低压区域并延迟边界层与所述第二 表面(15)。
    • 66. 发明公开
    • Conformal aero-adaptive nozzle / aftbody
    • 适形的空气自适应喷嘴/尾部体
    • EP1710156A2
    • 2006-10-11
    • EP06425228.1
    • 2006-04-03
    • Lockheed Martin Corporation
    • Miller, Daniel N.Young, David D.
    • B64C23/04F15D1/12
    • F15D1/12B64C21/04B64C23/00B64C23/04B64C2230/18Y02T50/166
    • The present invention provides flow field control techniques that adapt the aft body region flow field to eliminate or mitigate the development of massive separated flow field zones and associated unsteady vortical flow field structures. Embodiments of the present invention use one or more distributed arrays of flow control devices (submerged in the boundary layer) to create disturbances in the flow field that inhibit the growth of larger vortical structures and/or to energize the aft body shear layer to keep the shear layer attached the aft body surface. These undesirable aerodynamic phenomena produce increased vehicle drag which harms vehicle range, persistence, and loiter capabilities. Additionally, the unsteady nature of the turbulent vortical structures shed in the aft body wake region may produce increased dynamic buffeting and aft body heating by entraining nozzle jet exhaust (a.k.a. jet wash) - requiring additional structural support, shielding, and vehicle weight.
    • 本发明提供流场控制技术,其适应尾部本体区域流场以消除或减轻块状分离流场区域和相关联的不稳定涡流流场结构的发展。 本发明的实施例使用流控制装置的一个或多个分布式阵列(浸没在边界层中)以在流场中产生干扰,其抑制较大涡旋结构的生长和/或激励后体剪切层以保持 剪切层附接在尾部本体表面上。 这些不合要求的空气动力学现象会产生增加的车辆阻力,从而损害车辆的行驶范围,持久性和空闲能力。 此外,尾部尾部尾流区域中的湍流旋涡结构的不稳定性质可通过夹带喷嘴喷射排气(也称为喷射清洗)产生增加的动态抖振和尾部本体加热 - 需要额外的结构支撑,屏蔽和车辆重量。