Numerical study of the flow structures in flat plate and the wall-mounted hump induced by the unsteady DBD plasma

Jianyang YU; Huaping LIU; Ruoyu WANG; Fu CHEN

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Numerical study of the flow structures in flat plate and the wall-mounted hump induced by the unsteady DBD plasma

机译：非稳态DBD等离子体在平板和壁挂驼峰中流动结构的数值研究

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In this work,the dielectric-barrier-discharge plasma actuator was employed to study the flow structures induced by the plasma actuator over a flat plate and a wall-mounted hump.A phenomenological dielectric-barrier-discharge plasma model which regarded the plasma effect as the body force was implemented into the Navier–Stokes equations solved by the method of large eddy simulations.The results show that a series of vortex pairs,which indicated dipole formation and periodicity distribution were generated in the boundary layer when the plasma was applied to the flow over a flat plane.They would enhance the energy exchanged between the near wall region and the free stream.Besides,their spatial trajectories are deeply affected by the actuation strength.When the actuator was engaged in the flow over a wall-mounted hump,the vortex pairs were also produced,which was able to delay flow separation as well as to promote flow reattachment and reduce the generation of a vortex,achieving the goal of reducing dissipation and decreasing flow resistance.

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《等离子体科学和技术（英文版）》 |2017年第1期|57-63|共7页
作者
Jianyang YU; Huaping LIU; Ruoyu WANG; Fu CHEN;
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作者单位

School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, People's Republic of China;

School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, People's Republic of China;

School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, People's Republic of China;

School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, People's Republic of China;

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正文语种 eng
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Numerical study of the flow structures in flat plate and the wall-mounted hump induced by the unsteady DBD plasma

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