| 摘要 |
The machine has fluid extraction units provided at aerodynamic critical points on blade tip and annular channel surfaces at free ends of blades. The ends include a passage like opening with a front sided passage breadth (a) and a passage foot breadth (b) ranging from 0.1 mm to a local profile thickness (D). The extraction units include slits, where a starting point (A) of the slits lies between a front edge and a profile depth of 30 percentage of a chord length. An end point (E) of the slits lies between the starting point and a profile depth of 80 percentage of the chord length. |
