2012 Fiscal Year Final Research Report
Similarity of Flow in Pump Sump
| Project/Area Number |
22560158
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Fluid engineering
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| Research Institution | Yokohama National University |
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Principal Investigator |
MATSUI Jun 横浜国立大学, 工学研究院, 教授 (40251756)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 流体機械 / 吸込水槽 / 相似則 |
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| Research Abstract |
To study the similarity law in the flow of pump sump, especially on the critical submergence for both air entraining vortex and submerged vortex, three model pump sumps are constructed with geometrical similarity. Changing the flow rate and water height, the condition when sump vortex occurs is studied in each model. On the air entraining vortex, there are two critical lines of submergence, one is in proportional to the flow rate or velocity at bell inlet, the other is almost independent from flow rate. The former may be the effect of Froude number, but the later is not clear. On the submerged vortex, the line is not clear in the smallest model. Comparing the coefficients of above lines, the kinetic similarity is got at the same velocity condition, not Froude number similarity or Reynolds number similarity.
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