| 摘要 |
PROBLEM TO BE SOLVED: To reduce loss of a draft tube, suppress decline in hydraulic performance and reduce construction periods and construction costs in an electric power station, in the draft tube for hydraulic machinery provided with a horizontal enlargement part which is inclined upwardly at a swing-up angle with respect to a horizontal plane and of which flow passage cross section is increased toward a discharge channel side. SOLUTION: A horizontal run-up part 5d for once flowing running water in the horizontal direction is connected between a bend part 5b of the draft tube 5 and the horizontal enlargement part 5c which is inclined upwardly at the swing-up angleαwith respect to the horizontal plane 7 and of which flow passage cross section is increased toward the discharge channel side. COPYRIGHT: (C)2006,JPO&NCIPI
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