Pit-type compressor blade and control method for flow separation in cascade

The invention relates to the technical field of turbomachines, in particular to a pit-type compressor blade and a control method for flow separation in a cascade, wherein the compressor blade is provided with a pit. The pit is used as a kind of vortex generator, when the boundary layer fluid flows through the suction surface of the blade, a different form of vortex structure will be formed inside,and the generated vortex will promote the mixing of low-energy and high-entropy fluid and extra-layer fluid in the boundary layer, thereby increasing the kinetic energy level of the boundary layer and suppressing the flow separation, it is mainly used to control the flow separation in a stationary cascade of a compressor and reduce the flow loss, thereby improving the flow condition and the aerodynamic performance of the stationary cascade of the compressor. 本发明涉及的是种叶轮机械技术领域，具体是种凹坑型压气机叶片及其对叶栅内流动分离的控制方法，压气机叶片上设置凹坑。凹坑作为种涡发生器，当叶片吸力面边界层流体流过时，在其内部会形成形式不同的旋涡结构，所产生的流向涡会促进边界层内低能高熵流体与层外流体的掺混，进而提高了边界层动能水平，抑制了流动分离，其主要用于控制压气机静叶栅