1999 Fiscal Year Final Research Report Summary
Prediction and Control of University Separation
| Project/Area Number |
09045055
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| Research Category |
Grant-in-Aid for Scientific Research (B).
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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 | Kyushu Institute of Design |
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Principal Investigator |
TANAKA Kazuhiro Kyushu Institute of Technology A. Prof., 情報工学部, 教授 (80171742)
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| Co-Investigator(Kenkyū-buntansha) |
TSUKAMOTO Hiroshi Kyushu Institute of Technology Prof., 工学部, 教授 (50117305)
NISHI Michihiro Kyushu Institute of Technology Prof., 工学部, 教授 (80038588)
TANAKA Hiroki Kyushu Institute of Technology A. Prof., 情報工学部, 教授 (00227167)
SHIMIZU Fumio Kyushu Institute of Technology Assist., 情報工学部, 助手 (20284599)
OKTAY Baysal オールドドミンオン大学, 工学部, 教授
BALAKUMAR Ponnampalam Old Dominion University
BAYSAL Oktay Old Dominion University
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| Project Period (FY) |
1997 – 1999
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| Keywords | Separation / Unsteady flow / Airfoil / Moving body / Vortex / Fluid force / Prediction / Flow control |
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| Research Abstract |
The control of the flow separation has been important and interesting phenomenon. Recently, it has been more and more important because higher performance of flow has been demanded in a wide range of industry. The flow field around moving airfoils, such as pitching and translating airfoils, has been investigated energetically. However, few results were obtained by detailed measurements, especially at low Reynolds number region. The study of prediction of separation has begun to carry out and the technique of separation control has not been reported yet.
Many studies on unsteady separation around a moving airfoil have been carried out in the numerical and experimental studies. However, most of them have been performed at high Reynolds number region. The many unsolved problems on unsteady separation still remain because the phenomenon occurring around moving airfoils is very complicated. Considering separation control by using a moving airfoil, a large-sized airfoil is not practical because it needs the strong and big mechanical structure and high power. As a result, it is desirable for the separation control to use a small airfoil. Moreover, the study on separation control at low Reynolds number region attracts much attention by researchers developing the micro-electro-mechanical-systems (MEMS).
In this study, the mechanism of unsteady separation around pitching airfoils and the characteristics of unsteady fluid forces acting on them at low Reynolds number region have been clarified by the flow visualization and the unsteady fluid forces measurement.
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