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叶身/端壁融合(BBEW)是有潜力支撑风扇/压气机负荷最大化的原创技术.本文以大折转亚音叶栅和超音速叶栅两类趋向负荷极限叶栅为案例,在二面角原理指导下,采用数值方法对比研究了第一类(增大二面角型)和第二类(变曲率过渡曲面)BBEW改型。结果表明,两类BBEW改型均能有效削弱或消除高负荷压气机叶栅角区分离,且具有良好的工况适应性。其中,第一类BBEW改型虽外形上类似叶片倾斜,但作用机理却截然不同,附面层交汇作用超过叶片力作用.
The blade / endwall fusion (BBEW) is an original technology that has the potential to support the maximum fan / compressor load.In this paper, Guided by the noodles angle principle, the first type (increasing dihedral angle type) and the second type (curvature transitional surface) BBEW modification are comparatively studied by numerical methods. The results show that both types of BBEW retrofit can effectively weaken or eliminate the separation of high pressure compressor cascades and have good adaptability to working conditions. Among them, the first type of BBEW modification looks similar to the shape of the blade tilt, but the mechanism of action is completely different, the interaction of the surface layer over the blade force.