Water tunnel experiments on transverse-galloping of cantilevered rectangular and D-section prisms
In the case of an elastically mounted rectangular prism with a side ratio of less than D/H = 0.5 (where D: depth of a bluff body in the flow direction, H: height of a bluff body normal to the flow direction), it is well known that low-speed galloping appears at a lower reduced velocity than the reso...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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The Japan Society of Mechanical Engineers
2014-09-01
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| Series: | Journal of Fluid Science and Technology |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jfst/9/3/9_2014jfst0056/_pdf/-char/en |
| _version_ | 1798020948810530816 |
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| author | Takahiro KIWATA Makoto YAMAGUCHI Takaaki KONO Toshiyuki UENO |
| author_facet | Takahiro KIWATA Makoto YAMAGUCHI Takaaki KONO Toshiyuki UENO |
| author_sort | Takahiro KIWATA |
| collection | DOAJ |
| description | In the case of an elastically mounted rectangular prism with a side ratio of less than D/H = 0.5 (where D: depth of a bluff body in the flow direction, H: height of a bluff body normal to the flow direction), it is well known that low-speed galloping appears at a lower reduced velocity than the resonant reduced velocity. In order to investigate the effects of the geometric shape of the bluff body's cross section on the flow-induced transverse vibration, we performed free-vibration tests of cantilevered prisms with two kinds of cross sections, i.e., rectangular and D-section prisms. The effects of the side ratio D/H and the turbulence intensity of the free stream on the flow-induced vibration were also investigated. The response amplitude of the transverse vibration increases with a decrease in the side ratio. The response amplitude of a D-section prism with D/H = 0.23 vibrates at a lower reduced velocity than a rectangular prism with D/H = 0.2, and the increment rate of the response amplitude for a D-section prism with D/H = 0.23 is higher than that of the other prisms. It is found that the free-vibration characteristics of rectangular and D-section prisms are influenced by the high turbulence of the free stream. |
| first_indexed | 2024-04-11T17:06:00Z |
| format | Article |
| id | doaj.art-a057bcfda369442d92a4a78dc0872519 |
| institution | Directory Open Access Journal |
| issn | 1880-5558 |
| language | English |
| last_indexed | 2024-04-11T17:06:00Z |
| publishDate | 2014-09-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Journal of Fluid Science and Technology |
| spelling | doaj.art-a057bcfda369442d92a4a78dc08725192022-12-22T04:13:01ZengThe Japan Society of Mechanical EngineersJournal of Fluid Science and Technology1880-55582014-09-0193JFST0056JFST005610.1299/jfst.2014jfst0056jfstWater tunnel experiments on transverse-galloping of cantilevered rectangular and D-section prismsTakahiro KIWATA0Makoto YAMAGUCHI1Takaaki KONO2Toshiyuki UENO3Research Center for Sustainable Energy and Technology, Kanazawa UniversityGraduate School of Natural Science and Technology, Kanazawa UniversityResearch Center for Sustainable Energy and Technology, Kanazawa UniversitySchool of Electrical and Computer Engineering, Kanazawa UniversityIn the case of an elastically mounted rectangular prism with a side ratio of less than D/H = 0.5 (where D: depth of a bluff body in the flow direction, H: height of a bluff body normal to the flow direction), it is well known that low-speed galloping appears at a lower reduced velocity than the resonant reduced velocity. In order to investigate the effects of the geometric shape of the bluff body's cross section on the flow-induced transverse vibration, we performed free-vibration tests of cantilevered prisms with two kinds of cross sections, i.e., rectangular and D-section prisms. The effects of the side ratio D/H and the turbulence intensity of the free stream on the flow-induced vibration were also investigated. The response amplitude of the transverse vibration increases with a decrease in the side ratio. The response amplitude of a D-section prism with D/H = 0.23 vibrates at a lower reduced velocity than a rectangular prism with D/H = 0.2, and the increment rate of the response amplitude for a D-section prism with D/H = 0.23 is higher than that of the other prisms. It is found that the free-vibration characteristics of rectangular and D-section prisms are influenced by the high turbulence of the free stream.https://www.jstage.jst.go.jp/article/jfst/9/3/9_2014jfst0056/_pdf/-char/enflow-induced vibrationlow-speed gallopingrectangular prismd-section prismturbulence intensity |
| spellingShingle | Takahiro KIWATA Makoto YAMAGUCHI Takaaki KONO Toshiyuki UENO Water tunnel experiments on transverse-galloping of cantilevered rectangular and D-section prisms Journal of Fluid Science and Technology flow-induced vibration low-speed galloping rectangular prism d-section prism turbulence intensity |
| title | Water tunnel experiments on transverse-galloping of cantilevered rectangular and D-section prisms |
| title_full | Water tunnel experiments on transverse-galloping of cantilevered rectangular and D-section prisms |
| title_fullStr | Water tunnel experiments on transverse-galloping of cantilevered rectangular and D-section prisms |
| title_full_unstemmed | Water tunnel experiments on transverse-galloping of cantilevered rectangular and D-section prisms |
| title_short | Water tunnel experiments on transverse-galloping of cantilevered rectangular and D-section prisms |
| title_sort | water tunnel experiments on transverse galloping of cantilevered rectangular and d section prisms |
| topic | flow-induced vibration low-speed galloping rectangular prism d-section prism turbulence intensity |
| url | https://www.jstage.jst.go.jp/article/jfst/9/3/9_2014jfst0056/_pdf/-char/en |
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