论文部分内容阅读
首先回顾了短舱涡流发生器在民机研制中的应用及发展历程,然后结合民用飞机研发实践,借助于CFD工具初步计算并着重分析了短舱涡流发生器的流动控制机理。结果分析表明合理设计的短舱涡流发生器能够产生能量较强的集中涡,在分离敏感的短舱后翼面区域产生下洗流场并为边界层注入能量,降低短舱后气流的当地有效迎角,延缓由于“挂架涡”提前破裂而导致的大面积分离,从而能够改善失速区形态。
First of all, the application and development course of the nacelle vortex generator in civil aircraft development are reviewed. Based on the research and development of civil aircraft, the flow control mechanism of the nacelle vortex generator is calculated and analyzed emphatically by CFD tools. The results show that the reasonably designed nacelle vortex generators can produce concentrated energy vortexes, which generate a washdown flow field in the airfoil region after the separation of sensitive nacelles and inject energy into the boundary layer to reduce the local effectiveness of nacelle flow Angle of attack, delay due to “rack vortex ” premature rupture caused by the large area separation, which can improve the stall pattern.