| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a runner useful in application to a Francis turbine runner which has a relatively large number of blades and capable of improving manufacturing performance and hydraulic power performance. <P>SOLUTION: This runner 3 provided in a hydraulic machine comprises an outlet side blade part 7b composing a blade part at an runner outlet side and an inlet side blade part 7a having a length of 60%-80% of the whole blade length and composing the blade part at the runner inlet side, and is provided with a plurality of long blades 7 arranged at predetermined intervals along a runner rotation direction (m), and a plurality of short blades 8 arranged alternately with the long blades along a runner rotation direction (m), and formed in the same blade length as the inlet side blade part 7b of the long blade 7. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
