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Suppression of vortex shedding from a pantograph head using vortex generator-type plasma actuators
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- GEJIMA Haruhiko
- Department of Mechanical Engineering, Keio University
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- TAKINAMI Ryo
- Department of Mechanical Engineering, Keio University
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- FUKAGATA Koji
- Department of Mechanical Engineering, Keio University
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- MITSUMOJI Takeshi
- Railway Technical Research Institute
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- SUEKI Takeshi
- Railway Technical Research Institute
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- IKEDA Mitsuru
- Railway Technical Research Institute
Description
A vortex generator (VG) is one of the most successful devices used for suppression of flow separation. A conventional VG is a passive control device, so that it may suffer from an inherent drag penalty. As an alternative, we use a dielectric-barrier-discharge plasma actuator (PA) as a VG. Since few studies have been made on such a vortex generator-type plasma actuator (VG-PA), many questions still remain open, e.g., the effectiveness and the performance of the VG-PA for suppression of vortex shedding from a bluff body. In the present study, we experimentally evaluate the performance of the VG-PA by applying it to a pantograph head model of high-speed trains. The Reynolds number based on the freestream velocity and the width of the pantograph head model is 7200. The spanwise velocity induced by the VG-PA is about 33% of the freestream velocity. The flow field is measured by using particle image velocimetry. The present results show that the vortex shedding from a pantograph head model can significantly be suppressed by the VG-PA, which amounts to about 60% reduction in the transverse velocity fluctuations. It is also shown that a burst discharge control significantly improves the control effect in the single-side configuration, in which the vortex shedding is not much suppressed in the continuous mode.
Journal
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- Journal of Fluid Science and Technology
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Journal of Fluid Science and Technology 10 (1), JFST0006-JFST0006, 2015
The Japan Society of Mechanical Engineers
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Keywords
Details 詳細情報について
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- CRID
- 1390282680222049280
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- NII Article ID
- 130005068589
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- ISSN
- 18805558
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- Text Lang
- en
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
- OpenAIRE
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- Abstract License Flag
- Disallowed