用于产生流体动力的元件

An element for generating a fluid dynamic force

Abstract

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 a 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 theta to a tangent plane (Y-Y) to said second surface (15) in the vicinity of said outlet (21) and skewed at an angle f 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).
本发明涉及一种用于产生流体动力的元件(11),该元件(11)包括第一表面(13)和第二表面(15),它们从该元件(11)的前缘(17)沿相对方向延伸并在其后缘(18)处汇合而限定出三维主体,该三维主体成形为当以一迎角(α)浸入沿流动方向(U)经过该元件(11)的流体流时产生流体动力,第一表面(13)包括流体入口(19)的阵列,第二表面(15)包括相对应的流体出口(21)的阵列,各所述入口(19)均通过流体管道(23)与所述出口(21)流体连通,所述流体管道的至少一部分与所述第二表面(15)在所述出口(21)附近的切平面(Y-Y)成一倾斜角(θ),并与所述流体流动方向(U)成一偏斜角(φ),该布置使得元件(11)在使用中可操作以产生在所述前缘(17)下游靠近所述第一表面(13)的相对较高的流体压力区以及在所述前缘(17)下游靠近所述第二表面(15)的相对较低的流体压力区,并且来自所述相对较高的流体压力区的流体能够流入所述流体入口(19)经所述流体管道(23)从所述流体出口(21)流出而流入所述相对较低的压力区,从而产生流体涡流,所述流体涡流重新激励所述低压力区,从而延迟边界层与所述第二表面(15)分离。

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