Flow field generated by a dielectric barrier discharge plasma actuator in quiescent air at initiation stage
| Autor: | Yongdong Cui, Boo Cheong Khoo, Chien Ming Jonathan Tay, Xin Zhang |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
0209 industrial biotechnology
Materials science Aerospace Engineering Dielectric barrier discharge 02 engineering and technology Starting vortex 01 natural sciences 010305 fluids & plasmas law.invention Physics::Fluid Dynamics 020901 industrial engineering & automation Physics::Plasma Physics law Schlieren 0103 physical sciences Schlieren technique Plasma actuator Motor vehicles. Aeronautics. Astronautics Mechanical Engineering TL1-4050 Plasma Mechanics Particle image velocimetry Wall jet Flow control (fluid) Alternating current |
| Zdroj: | Chinese Journal of Aeronautics, Vol 34, Iss 3, Pp 13-24 (2021) |
| ISSN: | 1000-9361 |
| DOI: | 10.1016/j.cja.2020.08.013 |
| Popis: | A single Dielectric Barrier Discharge (DBD) plasma actuator driven by Alternating Current (AC) power, capable of inducing a starting vortex and a wall jet in quiescent air, is suited for low-Reynolds-number flow control. However, the starting vortex and the wall jet are usually observed after the plasma actuator has been operated for dozens of and hundreds of cycles of the voltage, respectively. The detail of the induced flow field at the initiation stage of the plasma actuator has rarely been addressed. At the initiation stage, a thin jet that provides the impetus for the entrainment of the induced flow at the beginning of the plasma actuation is first observed by using a high-accuracy phase-lock Schlieren technique and a high-speed Particle Image Velocimetry (PIV) system. This is the initial form of the momentum transfer from the plasma to the fluid. Then, an arched type jet is created by the plasma actuator. In addition, the whole development process of the induced flow field from the starting point of the thin jet to the quasi-steady stage of wall jet is presented for providing a comprehensive understanding of the plasma actuator and proposing a relevant enhancement of the numerical simulation model. |
| Databáze: | OpenAIRE |
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