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

Jianyang YU (俞建阳); Huaping LIU (刘华坪); Ruoyu WANG (王若玉); Fu CHEN (陈浮)

doi:10.1088/1009-0630/19/1/015502

Plasma Science and Technology > 2017 > 19(1): 15502-015502. > DOI: 10.1088/1009-0630/19/1/015502

Jianyang YU (俞建阳), Huaping LIU (刘华坪), Ruoyu WANG (王若玉), Fu CHEN (陈浮). Numerical study of the flow structures in flat plate and the wall-mounted hump induced by the unsteady DBD plasma[J]. Plasma Science and Technology, 2017, 19(1): 15502-015502. DOI: 10.1088/1009-0630/19/1/015502

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

1 School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, People’s Republic of China

Funds: This work is supported by the National Natural Science Foundation of China (Grant No. 51306042 and Grant No. 51421063).

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Received Date: June 14, 2016

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Abstract

Abstract

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.
- DBD plasma,
- flow structure,
- large eddy simulations,
- fluid dynamic

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References (24)

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