New approach to higher accurate measurement technique of the wall shear stress on moving obstacles by photographic images
| Project/Area Number |
15K13871
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Fluid engineering
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| Research Institution | Yamaguchi University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
鈴木 博貴 山口大学, 創成科学研究科, 助教 (10626873)
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| Project Period (FY) |
2015-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | 流体計測 / 壁面せん断応力 / 非接触計測 / 感温液晶 |
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| Outline of Final Research Achievements |
Possibility and applicability of wall shear stress measurement technique by photographic images has been investigated experimentally using temperature-sensitive liquid crystal sheets. The technique provides wireless measurement of the wall shear stress for rotating wings or moving obstacles. The crystal sheets show wall temperature on heated by electricity device and cooled by fluid flow.
Photographic images of the crystal sheets are converted into hue and then calibrated with temperature. Heat flux on the wall due to force convection is proportional to the wall shear stress that means momentum transport. The fluid flow adjacent to the wall produces wall shear stress and then reduces wall temperature due to heat transfer. The wall temperature measured by crystal sheets and camera images can be correlated to the wall shear stress.The experimental study in a 2D channel flow shows that the proposed technique has ability for measurement of the wall shear stress and its direction.
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Report
(3 results)
Research Products
(5 results)
