Study on the fundamental flow characteristics of synthetic jets(Behavior of free synthetic jets)
Jet flows have been applied in numerous fields to control flow separation. Over the last decade, several studies on the production of synthetic jets have been performed. However, little information is available about a number of aspects concerning synthetic jets, including details of the structure a...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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The Japan Society of Mechanical Engineers
2014-05-01
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| Series: | Journal of Fluid Science and Technology |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jfst/9/1/9_2014jfst0007/_pdf/-char/en |
| _version_ | 1819282269115777024 |
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| author | Koichi NISHIBE Yuki FUJITA Kotaro SATO Kazuhiko YOKOTA |
| author_facet | Koichi NISHIBE Yuki FUJITA Kotaro SATO Kazuhiko YOKOTA |
| author_sort | Koichi NISHIBE |
| collection | DOAJ |
| description | Jet flows have been applied in numerous fields to control flow separation. Over the last decade, several studies on the production of synthetic jets have been performed. However, little information is available about a number of aspects concerning synthetic jets, including details of the structure and the formation mechanism of such jets. The present study attempts to clarify some of the fundamental flow characteristics of free synthetic jets on the basis of experiments and numerical simulations. Experimental velocity measurements and flow visualizations are performed using the hot-wire anemometer and the smoke wire method, respectively. It is found that both the temporal change in the flow pattern and the time-averaged velocity distribution at the centerline depend on K = ReU/S2 (the ratio of the Reynolds number to the square of the Stokes number). The unsteady downstream flow characteristics are discussed in addition to the relation between the formative point of the synthetic jet and the value of K. Furthermore, the flow pattern and the unsteady flow characteristics of the synthetic jet are compared with those of a continuous jet. |
| first_indexed | 2024-12-24T01:12:54Z |
| format | Article |
| id | doaj.art-50d4fd3fb7e84938b8459ae535d81bce |
| institution | Directory Open Access Journal |
| issn | 1880-5558 |
| language | English |
| last_indexed | 2024-12-24T01:12:54Z |
| publishDate | 2014-05-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Journal of Fluid Science and Technology |
| spelling | doaj.art-50d4fd3fb7e84938b8459ae535d81bce2022-12-21T17:22:51ZengThe Japan Society of Mechanical EngineersJournal of Fluid Science and Technology1880-55582014-05-0191JFST0007JFST000710.1299/jfst.2014jfst0007jfstStudy on the fundamental flow characteristics of synthetic jets(Behavior of free synthetic jets)Koichi NISHIBE0Yuki FUJITA1Kotaro SATO2Kazuhiko YOKOTA3Department of Mechanical Engineering, Tokyo City UniversityDMW CorporationDepartment of Innovative Mechanical Engineering, Kogakuin UniversityDepartment of Mechanical Engineering, Aoyamagakuin UniversityJet flows have been applied in numerous fields to control flow separation. Over the last decade, several studies on the production of synthetic jets have been performed. However, little information is available about a number of aspects concerning synthetic jets, including details of the structure and the formation mechanism of such jets. The present study attempts to clarify some of the fundamental flow characteristics of free synthetic jets on the basis of experiments and numerical simulations. Experimental velocity measurements and flow visualizations are performed using the hot-wire anemometer and the smoke wire method, respectively. It is found that both the temporal change in the flow pattern and the time-averaged velocity distribution at the centerline depend on K = ReU/S2 (the ratio of the Reynolds number to the square of the Stokes number). The unsteady downstream flow characteristics are discussed in addition to the relation between the formative point of the synthetic jet and the value of K. Furthermore, the flow pattern and the unsteady flow characteristics of the synthetic jet are compared with those of a continuous jet.https://www.jstage.jst.go.jp/article/jfst/9/1/9_2014jfst0007/_pdf/-char/ensynthetic jetcontinuous jetfree jetvelocity distributionjet formationsmoke wire methodunsteady flowturbulence |
| spellingShingle | Koichi NISHIBE Yuki FUJITA Kotaro SATO Kazuhiko YOKOTA Study on the fundamental flow characteristics of synthetic jets(Behavior of free synthetic jets) Journal of Fluid Science and Technology synthetic jet continuous jet free jet velocity distribution jet formation smoke wire method unsteady flow turbulence |
| title | Study on the fundamental flow characteristics of synthetic jets(Behavior of free synthetic jets) |
| title_full | Study on the fundamental flow characteristics of synthetic jets(Behavior of free synthetic jets) |
| title_fullStr | Study on the fundamental flow characteristics of synthetic jets(Behavior of free synthetic jets) |
| title_full_unstemmed | Study on the fundamental flow characteristics of synthetic jets(Behavior of free synthetic jets) |
| title_short | Study on the fundamental flow characteristics of synthetic jets(Behavior of free synthetic jets) |
| title_sort | study on the fundamental flow characteristics of synthetic jets behavior of free synthetic jets |
| topic | synthetic jet continuous jet free jet velocity distribution jet formation smoke wire method unsteady flow turbulence |
| url | https://www.jstage.jst.go.jp/article/jfst/9/1/9_2014jfst0007/_pdf/-char/en |
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