Flow disturbances depending on excitation frequency on a flat plate by a piezoceramic actuator
- Title
- Flow disturbances depending on excitation frequency on a flat plate by a piezoceramic actuator
- Author
- 조진수
- Keywords
- Flow control; Piezoceramic actuator; Streamwise vortex pair; Excitation frequency effect; TURBULENT-BOUNDARY-LAYERS; PIEZOELECTRIC ACTUATORS; STREAMWISE VORTICES; ACTIVE CONTROL; WALL REGION; PERTURBATIONS; SEPARATION
- Issue Date
- 2013-03
- Publisher
- SPRINGER, VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
- Citation
- JOURNAL OF VISUALIZATION,Vol.16 No.2 ,111-121
- Abstract
- Flow disturbances by a piezoceramic actuator were investigated to obtain physical insights on the streamwise vortex formation and excitation frequency effects on a piezoceramic actuator. Boundary-layer measurements in wind tunnel and flow visualization in water tunnel were carried out to explore flow disturbance. Findings revealed that streamwise vortex pair was formed in the moderate excitation frequency range, accompanied by low- and high-speed regions formation in the streamwise mean velocity field. U-turbulence intensity was tremendously increased in the high excitation frequency range. As a result, the formation of streamwise vortex pair was significantly influenced by excitation frequency and thus, the flow control purpose should be considered when constructing the proper design parameters for a piezoceramic actuator.
- URI
- https://link.springer.com/article/10.1007/s12650-013-0162-5http://hdl.handle.net/20.500.11754/43968
- ISSN
- 1343-8875
- DOI
- 10.1007/s12650-013-0162-5
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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