1992 Fiscal Year Final Research Report Summary
Enhancement of Hydraulic Machinery by Use of Shape Memory Alloys
| Project/Area Number |
02555042
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Fluid engineering
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| Research Institution | Kyushu Institute of Technology |
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Principal Investigator |
TSUKAMOTO Hiroshi Kyushu Institute of Technology, Faculty of Engineering, Professor, 工学部, 教授 (50117305)
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| Co-Investigator(Kenkyū-buntansha) |
TANAKA Kazuhiro Kyushu Institute of Technology, Faculty of Computer Science and System Engineeri, 情報工学部, 助教授 (80171742)
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| Project Period (FY) |
1990 – 1992
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| Keywords | Shape Memory Alloy / Hydraulic Machinery / Blade / Actuator / Flow Control / Stall / Flow Separation / Flow Visualization |
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| Research Abstract |
A shape-controlled airfoil was developed by the use of shape memory alloys (SMA). The developed airfoil consisted of the leading and trailing parts, between which the SMA rods were inserted. While the trailing part was fixed on the wall of the test section in the wind tunnel, the leading part could be turned about 9 the SMA. The two way change in the blade shape was realized by the use of a differential two way element in which the two different shapes were memorized. The developed airfoil was tested in the wind tunnel in order to check the effect of the shape change on the characteristics of the airfoil. The flow visualization experiments in the smoke tunnel showed that th e shape change by an electrically heated SMA produced a marked change in flow around the airfoil near the stall angle of the original shape. Moreover, the traverse of the wake behind the airfoil also exhibited the effect of the shape change in the airfoil. As a result of this study, it was found that the developed SMA actuator was effective for the control of flow separation from the blade surface. And it is suggested that the SMA actuator can be applied to the turbomachinery as an active control for the airfoil.
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