Active flow separation control at the outer wing
Active flow separation control at the outer wing
复制标题
外翼主动气流分离控制
DOI：
10.1007/s13272-019-00402-4
复制
发表时间：
2020
影响因子：
--
通讯作者：
M. Costes
中科院分区：
文献类型：
--
作者：
J. Rosenblum;P. Vrchota;A. Prachař;S. Peng;S. Wallin;P. Eliasson;P. Iannelli;V. Ciobaca;J. Wild;J. Hantrais;M. Costes
在欧洲项目 AFLoNext 中，其中一项技术致力于研究主动流量控制 (AFC)，以提高起飞条件下翼尖设计的稳健性，同时优化巡航中的空气动力效率。 AFC用于延迟由涡流击穿引起的翼尖失速，从而提高升阻比，并在起落架收起的第二段爬升期间允许更陡的爬升梯度。 AFC 空气动力学尺寸的数值参数研究在相关合作伙伴之间根据致动器位置（在前缘区域或上表面）和致动器类型（稳定吹风、合成射流、脉冲射流）共享。大多数数值结果都是通过连续或分段槽进行稳定吹气而获得的。还确定了非稳态驱动方式对流拓扑的具体影响。本研究的目的是考虑空中客车公司定义的工业要求以及参与 AFC 硬件开发的项目合作伙伴对 AFC 执行器的几何约束。对合作伙伴的结果进行了一些比较，以便得出初步结论。事实证明，最有效和高效的装置是通过位于前缘分离线的分段槽进行脉冲吹气。
Within the European project AFLoNext, one of the technological streams is dedicated to the investigation of active flow control (AFC) to increase the robustness of the wing tip design at takeoff conditions, whilst allowing the optimization of aerodynamic efficiency in cruise. AFC is used to delay the wing tip stall, which is caused by vortex breakdown, thus improving the lift to drag ratio and allowing a steeper climb gradient during second segment climb when the landing gear is retracted. The numerical parametric studies of AFC aerodynamic sizing were shared between the involved partners on the basis of actuator location (in the leading edge region or on the upper surface) and actuator types (steady blowing, synthetic jets, pulsed jets). Most of the numerical results have been obtained for steady blowing through continuous or segmented slots. The specific effect of the unsteady means of actuation on the flow topology was also identified. The aim of this study was to take into account industrial requirements defined by Airbus and geometric constraints of AFC actuators arising from the project partners involved in the development of AFC hardware. Some comparisons between the partners’ results are presented, allowing preliminary conclusions to be drawn. The most effective and efficient device turned out to be pulsed blowing through segmented slots located at the leading edge separation line.