叶片通道内涡流发生器变工况适应性

横向二次流是制约叶轮机气动负荷进一步提升的主要因素。在叶片通道内施加涡流发生器有抑制通道横向二次流的潜力，但涡流发生器的最优施加方案很难确定。基于涡流发生器经验统计模型(BAYC模型)和响应面方法建立了一种端壁涡流发生器的高效设计方法。基于这一方法，实施于NACA 65直列叶栅，得到了三种涡流发生器优化方案，并在设计工况下和非设计工况下讨论了涡流发生器对端壁横向二次流的控制机理，发现具有更大的涡流发生器高度和更多的涡流发生器数量的方案在面对大攻角下的强横向二次流情况时能够有更强的余力对横向二次流加以控制，大大扩展了叶栅的攻角适用范围。 

Load adaptability of vortex generators in blade passage

Secondary cross flow limits the aerodynamic loading level of turbomachinery. Vortex generators have the potential to attenuate secondary cross flow when they are implemented at the endwall of the blade passage. An efficient method for designing the optimal vortex generator layout was presented based on a mathematical model (BAYC model) and an optimization procedure with response surface methods. In order to illustrate the proposed method, three layouts of vortex generators were optimized in an NACA 65 straight cascades. The flow mechanism of the vortex generators to control the endwall secondary cross flow were analyzed under design and off-design conditions. The results demonstrate that a higher vortex generator and a larger number of vortex generators can be more efficient to weaken the secondary cross flow when the incidence angle of the cascade is large. The application of the vortex generators can improve the load adaptability of the compressor cascade.