2015 Fiscal Year Final Research Report
Effect of tripping device on turbulent boundary layer
| Project/Area Number |
25420110
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Fluid engineering
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| Research Institution | Shinshu University |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | 乱流 / 境界層 / トリッピング / 速度圧力相関 |
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| Outline of Final Research Achievements |
The present study has experimentally revealed tripping influence on a turbulent boundary layer with five different tripping devices including the classical circular rods and the wall-mounted disturbance array that has 72 slots aligned in spanwise direction. Measurements were made with a single hot wire and a spanwise sensor array of 64 MEMS microphone mounted on the wall. The experimental results indicated that the velocity-pressure correlation is sensitively changed by the tripping devices, while the mean velocity profile is not remarkably affected. Though this tripping influence on the correlation was confirmed only in the low range of Reynolds number, it warns that the transition process should be taken into consideration in investigations on turbulent boundary layer flow.
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| Free Research Field |
乱流・層流乱流遷移
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