| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a reverse running pump turbine that can improve a water turbine efficiency with a simple configuration without increasing a manufacturing cost. <P>SOLUTION: An edge part of a blade 11 of a runner 2 on its radially outer side has a curved surface shape to have a gradually-smaller curvature radius toward the tip end. A tongue piece part 20 provided at a border on a side of a casing 3 between a straight passage 16 and a circular passage 15 is shaped to be gradually-thinner toward the tip end from its base part side. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
