| 摘要 |
<p>A Francis turbine runner (5) for inlet head above 200 m, comprising a band (8), a crown (9) concentric with the band (8), and a plurality of spaced blades (10) between the band and the crown, for rotation about a turbine axis (26) by the action of water flowing between adjacent blades (10), into a central outlet area (19) and out from the turbine runner through an outlet (28) of the band (8) with an outlet diameter (Db), each blade has an inlet side (17), the blades are arranged with their inlet sides (17) around the circumference of the runner (5), each blade has an inlet diameter, the blades collectively have a mean inlet diameter (Dm), at least one blade (10) has an inlet diameter with a deviation from the mean inlet diameter (Dm) of 0.5 to 3% of the band outlet diameter (Db).</p> |
