Experimental investigations of induced flow by DBD plasma actuators with fine structure electrodes
Dielectric barrier discharge plasma actuators (DBD-PAs) have been developed for active flow control devices that do not contain mechanical moving parts. In this study, flow properties induced by DBD-PAs with fine structure exposed electrodes were investigated in experiment to accelerate the induced...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | Japanese |
| Published: |
The Japan Society of Mechanical Engineers
2016-05-01
|
| Series: | Nihon Kikai Gakkai ronbunshu |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/transjsme/82/838/82_16-00068/_pdf/-char/en |
| _version_ | 1797989007032844288 |
|---|---|
| author | Hiroki HAGIWARA Satoshi OGATA Hirotoshi KUSANO Takehiko SEGAWA |
| author_facet | Hiroki HAGIWARA Satoshi OGATA Hirotoshi KUSANO Takehiko SEGAWA |
| author_sort | Hiroki HAGIWARA |
| collection | DOAJ |
| description | Dielectric barrier discharge plasma actuators (DBD-PAs) have been developed for active flow control devices that do not contain mechanical moving parts. In this study, flow properties induced by DBD-PAs with fine structure exposed electrodes were investigated in experiment to accelerate the induced flow. We prepared the following four types of test actuators: (1) normal-type, with the conventional type of exposed electrode, (2) span-type, with fine exposed electrode of a width of 0.1 mm, (3) stream-type, with slot-type exposed electrode, into which many 0.15 by 1 mm slots were cut, and (4) porous-type, with porous-type exposed electrode, into which many holes of diameter 0.15 mm were cut. Analyzing the velocity distribution of the induced jet using particle image velocimetry, we found that at Vp-p = 5-7 kV, the velocity of the induced jet was increased for span-type and stream-type actuators, when compared with normal-type actuator. The largest increase of velocity was about 20% at 20 mm downstream from the electrode. In relation to the mechanism of the acceleration, we found that a dielectric barrier discharge (DBD) is generated not only at the downstream edge, but also at the upstream edge. By the Schlieren flow visualization, it could be seen that the DBD generated in the downstream direction produced an induced jet in the downstream direction as normal. However, the DBD generated in the upstream direction was found to have the effect of producing an induced jet in both the downstream and the upstream directions. In other words, it was qualitatively shown that the jet that was induced by the DBD generated on the upstream side of the fine exposed electrodes adds to the induced jet in the downstream direction, and as a result, the velocity of the downstream direction induced jet increases. |
| first_indexed | 2024-04-11T08:13:22Z |
| format | Article |
| id | doaj.art-181a3daab18545e4953554786219ca2d |
| institution | Directory Open Access Journal |
| issn | 2187-9761 |
| language | Japanese |
| last_indexed | 2024-04-11T08:13:22Z |
| publishDate | 2016-05-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Nihon Kikai Gakkai ronbunshu |
| spelling | doaj.art-181a3daab18545e4953554786219ca2d2022-12-22T04:35:16ZjpnThe Japan Society of Mechanical EngineersNihon Kikai Gakkai ronbunshu2187-97612016-05-018283816-0006816-0006810.1299/transjsme.16-00068transjsmeExperimental investigations of induced flow by DBD plasma actuators with fine structure electrodesHiroki HAGIWARA0Satoshi OGATA1Hirotoshi KUSANO2Takehiko SEGAWA3Tokyo Metropolitan University, Department of Mechanical EngineeringTokyo Metropolitan University, Department of Mechanical EngineeringTokyo Metropolitan University, Department of Mechanical EngineeringNational Institute of Advanced Industrial Science and Technology (AIST)Dielectric barrier discharge plasma actuators (DBD-PAs) have been developed for active flow control devices that do not contain mechanical moving parts. In this study, flow properties induced by DBD-PAs with fine structure exposed electrodes were investigated in experiment to accelerate the induced flow. We prepared the following four types of test actuators: (1) normal-type, with the conventional type of exposed electrode, (2) span-type, with fine exposed electrode of a width of 0.1 mm, (3) stream-type, with slot-type exposed electrode, into which many 0.15 by 1 mm slots were cut, and (4) porous-type, with porous-type exposed electrode, into which many holes of diameter 0.15 mm were cut. Analyzing the velocity distribution of the induced jet using particle image velocimetry, we found that at Vp-p = 5-7 kV, the velocity of the induced jet was increased for span-type and stream-type actuators, when compared with normal-type actuator. The largest increase of velocity was about 20% at 20 mm downstream from the electrode. In relation to the mechanism of the acceleration, we found that a dielectric barrier discharge (DBD) is generated not only at the downstream edge, but also at the upstream edge. By the Schlieren flow visualization, it could be seen that the DBD generated in the downstream direction produced an induced jet in the downstream direction as normal. However, the DBD generated in the upstream direction was found to have the effect of producing an induced jet in both the downstream and the upstream directions. In other words, it was qualitatively shown that the jet that was induced by the DBD generated on the upstream side of the fine exposed electrodes adds to the induced jet in the downstream direction, and as a result, the velocity of the downstream direction induced jet increases.https://www.jstage.jst.go.jp/article/transjsme/82/838/82_16-00068/_pdf/-char/endielectric barrier discharge plasma actuatorflow controlpiv measurementfine structure electrode |
| spellingShingle | Hiroki HAGIWARA Satoshi OGATA Hirotoshi KUSANO Takehiko SEGAWA Experimental investigations of induced flow by DBD plasma actuators with fine structure electrodes Nihon Kikai Gakkai ronbunshu dielectric barrier discharge plasma actuator flow control piv measurement fine structure electrode |
| title | Experimental investigations of induced flow by DBD plasma actuators with fine structure electrodes |
| title_full | Experimental investigations of induced flow by DBD plasma actuators with fine structure electrodes |
| title_fullStr | Experimental investigations of induced flow by DBD plasma actuators with fine structure electrodes |
| title_full_unstemmed | Experimental investigations of induced flow by DBD plasma actuators with fine structure electrodes |
| title_short | Experimental investigations of induced flow by DBD plasma actuators with fine structure electrodes |
| title_sort | experimental investigations of induced flow by dbd plasma actuators with fine structure electrodes |
| topic | dielectric barrier discharge plasma actuator flow control piv measurement fine structure electrode |
| url | https://www.jstage.jst.go.jp/article/transjsme/82/838/82_16-00068/_pdf/-char/en |
| work_keys_str_mv | AT hirokihagiwara experimentalinvestigationsofinducedflowbydbdplasmaactuatorswithfinestructureelectrodes AT satoshiogata experimentalinvestigationsofinducedflowbydbdplasmaactuatorswithfinestructureelectrodes AT hirotoshikusano experimentalinvestigationsofinducedflowbydbdplasmaactuatorswithfinestructureelectrodes AT takehikosegawa experimentalinvestigationsofinducedflowbydbdplasmaactuatorswithfinestructureelectrodes |