通过三类低展弦比涡轮叶栅气动参数的详细测量与壁面 (包括上、下端壁与叶片表面 )流动显示 ,研究了叶片弯曲降低能量损失的机理。实验结果表明 :在不同叶栅几何参数下 ,叶片弯曲形式的选择取决于叶栅内涡量场与胀量场的适量匹配 Through the detailed measurement of the aerodynamic parameters of three low aspect ratio turbine cascades and the flow display on the wall (including the upper and lower end walls and the blade surface), the mechanism of the blade bending to reduce the energy loss was studied. The experimental results show that under different parameters of cascade geometry, the choice of blade bending mode depends on the proper matching between the vorticity field and the expansion field