2012 Fiscal Year Final Research Report
Basic Study of Visualization for New Multiple Flows of Jet Streams from Diamond-Shaped Cylinder Bundles
| Project/Area Number |
22560180
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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 | Fukuyama University |
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Principal Investigator |
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| Project Period (FY) |
2010 – 2012
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| Keywords | 流体工学 / 可視化 / 噴流 / 混相流 / 菱形角柱群流路 |
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| Research Abstract |
The flow visualization work with the aid of PIV and Piezometer deals with flip-flop flow around diamond-shaped cylinder bundle revised with concavities on both bundle walls. It is disclosed that (i) the concavity constructed on both side-walls of a diamond cylinder induces a substantial change in the flow patterns in the exit jet-stream field and jet-stream dispersion, (ii) pressure characteristics are quantitatively measured in a diverging-flow region in the diamond cylinder and the cavity with bundles, and in its downstream region, and (iii) flip-flop flow occurs in the flow passages and its occurrence condition is obtained.
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