Flow control of rectangular jet by DBD plasma actuators
The utility of a dielectric barrier discharge (DBD) plasma actuator as a spread controller for a rectangular jet is investigated. The rectangular nozzle (75×10 mm) is used and actuators are placed on the long sides of the nozzle exit. The unsteady actuation of actuators is performed by changing the...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | Japanese |
| Published: |
The Japan Society of Mechanical Engineers
2015-03-01
|
| Series: | Nihon Kikai Gakkai ronbunshu |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/transjsme/81/825/81_14-00695/_pdf/-char/en |
| _version_ | 1797988712025423872 |
|---|---|
| author | Yoshihisa KATO Kota ITOH Shigeki IMAO Satoshi KIKUCHI Yasuaki KOZATO |
| author_facet | Yoshihisa KATO Kota ITOH Shigeki IMAO Satoshi KIKUCHI Yasuaki KOZATO |
| author_sort | Yoshihisa KATO |
| collection | DOAJ |
| description | The utility of a dielectric barrier discharge (DBD) plasma actuator as a spread controller for a rectangular jet is investigated. The rectangular nozzle (75×10 mm) is used and actuators are placed on the long sides of the nozzle exit. The unsteady actuation of actuators is performed by changing the modulation frequency, the duty ratio and the phase difference. The flow visualization and the velocity measurements are conducted, and it is found that the spread of rectangular jet is controllable by the DBD plasma actuator. In the case that the actuators are operated in the same phase, the jet width depends on the modulation frequency rather than the duty ratio. The jet width becomes larger than that of base case when the dimensionless modulation frequency is less than about 1.36. In the case that the actuators are operated in the opposite phase, the jet width strongly depends on the duty ratio when the dimensionless modulation frequency is less than about 0.682. The largest spread in xy plane appears when the dimensionless modulation frequency is 0.125, the duty ratio is 10 %, and the phase difference is π. Its modulation frequency is nearly equivalent to 1/8 of the natural frequency of base case. In such a case, the alternative vortex grows near the nozzle exit and the jet width in xy plane becomes about three times larger than that of base case. It is also noticed that the smallest spread in xy plane appears when the dimensionless modulation frequency is 1.59, the duty ratio is 30 %. In this case, the definite vortex shedding is suppressed and small scale structure emerged near the nozzle exit, and the jet width in xy plane becomes about 20 % smaller than that of base case. |
| first_indexed | 2024-04-11T08:08:27Z |
| format | Article |
| id | doaj.art-bc3f613e17104eb499e794cd545f2524 |
| institution | Directory Open Access Journal |
| issn | 2187-9761 |
| language | Japanese |
| last_indexed | 2024-04-11T08:08:27Z |
| publishDate | 2015-03-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Nihon Kikai Gakkai ronbunshu |
| spelling | doaj.art-bc3f613e17104eb499e794cd545f25242022-12-22T04:35:28ZjpnThe Japan Society of Mechanical EngineersNihon Kikai Gakkai ronbunshu2187-97612015-03-018182514-0069514-0069510.1299/transjsme.14-00695transjsmeFlow control of rectangular jet by DBD plasma actuatorsYoshihisa KATO0Kota ITOH1Shigeki IMAO2Satoshi KIKUCHI3Yasuaki KOZATO4Gifu University, Graduate School of EngineeringGifu University, Graduate School of EngineeringGifu University, Department of Mechanical EngineeringGifu University, Department of Mechanical EngineeringDaido University, Department of Integrated Mechanical EngineeringThe utility of a dielectric barrier discharge (DBD) plasma actuator as a spread controller for a rectangular jet is investigated. The rectangular nozzle (75×10 mm) is used and actuators are placed on the long sides of the nozzle exit. The unsteady actuation of actuators is performed by changing the modulation frequency, the duty ratio and the phase difference. The flow visualization and the velocity measurements are conducted, and it is found that the spread of rectangular jet is controllable by the DBD plasma actuator. In the case that the actuators are operated in the same phase, the jet width depends on the modulation frequency rather than the duty ratio. The jet width becomes larger than that of base case when the dimensionless modulation frequency is less than about 1.36. In the case that the actuators are operated in the opposite phase, the jet width strongly depends on the duty ratio when the dimensionless modulation frequency is less than about 0.682. The largest spread in xy plane appears when the dimensionless modulation frequency is 0.125, the duty ratio is 10 %, and the phase difference is π. Its modulation frequency is nearly equivalent to 1/8 of the natural frequency of base case. In such a case, the alternative vortex grows near the nozzle exit and the jet width in xy plane becomes about three times larger than that of base case. It is also noticed that the smallest spread in xy plane appears when the dimensionless modulation frequency is 1.59, the duty ratio is 30 %. In this case, the definite vortex shedding is suppressed and small scale structure emerged near the nozzle exit, and the jet width in xy plane becomes about 20 % smaller than that of base case.https://www.jstage.jst.go.jp/article/transjsme/81/825/81_14-00695/_pdf/-char/enjetflow controlplasma actuatordielectric barrier discharge(dbd)turbulent flow |
| spellingShingle | Yoshihisa KATO Kota ITOH Shigeki IMAO Satoshi KIKUCHI Yasuaki KOZATO Flow control of rectangular jet by DBD plasma actuators Nihon Kikai Gakkai ronbunshu jet flow control plasma actuator dielectric barrier discharge(dbd) turbulent flow |
| title | Flow control of rectangular jet by DBD plasma actuators |
| title_full | Flow control of rectangular jet by DBD plasma actuators |
| title_fullStr | Flow control of rectangular jet by DBD plasma actuators |
| title_full_unstemmed | Flow control of rectangular jet by DBD plasma actuators |
| title_short | Flow control of rectangular jet by DBD plasma actuators |
| title_sort | flow control of rectangular jet by dbd plasma actuators |
| topic | jet flow control plasma actuator dielectric barrier discharge(dbd) turbulent flow |
| url | https://www.jstage.jst.go.jp/article/transjsme/81/825/81_14-00695/_pdf/-char/en |
| work_keys_str_mv | AT yoshihisakato flowcontrolofrectangularjetbydbdplasmaactuators AT kotaitoh flowcontrolofrectangularjetbydbdplasmaactuators AT shigekiimao flowcontrolofrectangularjetbydbdplasmaactuators AT satoshikikuchi flowcontrolofrectangularjetbydbdplasmaactuators AT yasuakikozato flowcontrolofrectangularjetbydbdplasmaactuators |