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Effect of vortex generator on the boundary layer detachment on NACA0015 2D foil

机译:涡旋发生器对NACA0015 2D箔边界层分离的影响

摘要

Control of detachment of the boundary layer around a foil found many applications in various configurations for aircraft the ability to suppress or delay the separation phenomenon leads to enhanced levels of lift, reduce noise and drag. Many studies have been experimentally conducted to test the effectiveness of different actuators. For example, regarding the methods called "active" which introduce external energy into the fluid, it distinguishes the use of movable walls Modi et al. [1], methods based on suction or blowing Wygnanski [2], McCormick [3], acoustic methods Collins [4], thermal Chang [5] or electromagnetic Gad-el-Hak [6]. In recent years, synthetic jets have been used to control flow separation and to stabilize the boundary layer by adding/removing momentum with the formation of vortical structures Wygnanski [7]. More recently, Gilarranz et al. [8] performed a study of flow separation over NACA0015 airfoil with synthetic jets control, but the modification by the control of the boundary layer has not been clearly identify.
机译:在箔片周围边界层的分离的控制在飞机的各种构造中发现了许多应用,其抑制或延迟分离现象的能力导致升力水平提高,噪声和阻力减小。已经通过实验进行了许多研究以测试不同致动器的有效性。例如,关于将外部能量引入流体的称为“主动”的方法,它区分了可移动壁的使用。 [1],基于抽吸或吹气的方法Wygnanski [2],McCormick [3],声学方法Collins [4],热力法[5]或电磁Gad-el-Hak [6]。近年来,合成射流已用于控制流动分离并通过增加/去除动量以及形成涡旋结构Wygnanski [7]来稳定边界层。最近,Gilarranz等。 [8]对合成喷嘴控制下的NACA0015机翼上的流分离进行了研究,但边界层控制的改进尚不清楚。

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