The parametric investigation of influence of DBD actuator on the boundary layer under various Reynolds number

21st Fluid Mechanics Conference

物理学;力学

Procházka, P.^1 ; Uruba, V.^1

IT ASCR, Dolejskova 5, 182 00 Praha 8, Czech Republic^1

关键词: Dielectric barrier discharges;    Inlet velocity;    Mean flow fields;    Parametric investigations;    Plasma DBD;    Rectangular channel;    Voltage waveforms;    Vortical structures;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/530/1/012008/pdf
DOI  :  10.1088/1742-6596/530/1/012008

学科分类：力学，机械学

来源: IOP

【 摘 要 】

In the previous research, the wall-jet-like flow or vortical structures were generated using a single dielectric barrier discharge (DBD) actuator in still air. It has been shown that the actuator can generated so-called vortex train if it is powered by modulated voltage waveform. Now, the plasma DBD actuator is placed inside a rectangular channel and an interaction with boundary layer (BL) is studied. The characteristics of the BL are modifying by varying inlet velocity. The actuator is adjusted to be set in spanwise orientation which means that the generated wall-jet-like flow is oriented in the same meaning as the main flow or in the opposite direction. The interaction of vortical structures generated by actuator with BL will be described quantitatively from mean flow field.