弯掠动叶对旋转失速流场的影响

给出了弯掠动叶和径向（常规）动叶旋转失速工况下流场的实验结果，论述了这两种叶片在变工况下的性能差异以及弯掠动叶对旋转失速特征参数的影响，进行了失速前后有关试验数据的对比分析，讨论了弯掠动叶引起旋转失速流场变化的机理及对流场的改善作用．

Influence of skewed swept on rotor blades in the flow field of rotating stall

Few literature on aerodynamic and aeroacoustic performance of an axial fan with skewed swept rotor blades in rotating stall is presented. Flow field of the testing fan with skewed swept rotor blades in rotating stall condition and its forward and rearward condition were measured and compared to that of a fan with radial (conventional) rotor blades of the same geometrical parameters under the condition of the same peak pressure. The different experiment results of variable working condition performances of the fans with either skewed swept rotor blades or radial rotor blades are described in detail. The influence of skewed swept rotor blade on rotating stall characteristic parameters__the number, size, position and propagation speed of rotating stall cell is discussed. The incidence angle distribution of rotor and stator at the minimum flow of the steady working condition and the aerodynamic performance of the low flow steady working condition were measured. Noise of the fan with skewed swept rotor blades is always lower than that of the fan with radial rotor blades. The improvement effect of skewed swept rotor blades on flow field in rotating stall, and the mechanism of flow field variation in rotating stall caused by skewed swept rotor blades have been analyzed.