| 摘要 |
Rotary vanes (16) having inducer-joined axial-flow vane portions (16a), mixed-flow vane portions (16b) collisionlessly connected to the axial-flow vane portions, and centrifugal vane portions (16c) collisionlessly connected to the mixed-flow vane portions are wound around an outer peripheral surface (15c) of a hub (15) that is continuous in curvature and configured with a moderate slope region (15c1) and a steep slope region (15c2), the axial-flow vane portions (16a) and the mixed-flow vane portions (16b) being wound around the moderate slope region (15c1), and the centrifugal vane portions (16c) being wound around the steep slope region (15c2). <IMAGE> |
