| Project/Area Number |
26820043
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Fluid engineering
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| Research Institution | Shinshu University |
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Principal Investigator |
IIO Shouichiro 信州大学, 学術研究院工学系, 准教授 (80377647)
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
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| Keywords | 液膜流 / 遠心力不安定 / レイノルズ数 / ゲルトラー数 / 水車性能 / 定在波 / 遠心力 / 水車 |
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| Outline of Final Research Achievements |
Standing waves generate along the streamwise direction on the surface of water flow through the convex channel. It was revealed that each waves have regularity in the spanwise direction of the channel, and its amplitude strongly depends on the water velocity and the curvature of the channel. The flow pattern is also occurred on the water guide for a waterfall type hydraulic turbine. In case of the turbine, the wave degrades the turbine performance due to shift from the optimum water impinging position to the runner. The setting angle of the straight part which is connected tangentially to the curved channel was investigated. As a result, higher performance is obtained for lower angle. The performance improvement effect is much remarkable for larger flow rate condition.
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