Design and characterization of a virtual-dimple plasma actuator for turbulent skin-friction drag reduction

Ziqi Fang; Haohua Zong; Yun Wu; Hua Liang; Rui Cao; Zhi Su; Weizhuo Hua

doi:10.1063/5.0197156

Design and characterization of a virtual-dimple plasma actuator for turbulent skin-friction drag reduction

Ziqi Fang
, Haohua Zong
, Yun Wu
, Hua Liang
, Rui Cao
, Zhi Su
, Weizhuo Hua

School of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

A virtual-dimple plasma actuator (VDPA), capable of producing suction flow above a staggered array of circular anodes, is proposed for turbulent skin-friction drag reduction. Characteristics of the VDPA at different discharge voltages are studied using multi-slice stereoscopic particle image velocimetry and electrical measurements. Results indicate that the VDPA induces a downwash suction flow above the cathode, a wall-normal jet flow above the anode, and a counter-rotating vortex pair caused by near-wall jet impingement. With increasing discharge voltage, both the peak blowing velocity and centerline-jet decay rate increase, while the dimensionless total circulation decreases linearly. For different cases, the vortex-core spacing remains approximately unchanged at 0.43D.

Original language	English
Article number	031702
Journal	Physics of Fluids
Volume	36
Issue number	3
DOIs	https://doi.org/10.1063/5.0197156
State	Published - 1 Mar 2024

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abstract = "A virtual-dimple plasma actuator (VDPA), capable of producing suction flow above a staggered array of circular anodes, is proposed for turbulent skin-friction drag reduction. Characteristics of the VDPA at different discharge voltages are studied using multi-slice stereoscopic particle image velocimetry and electrical measurements. Results indicate that the VDPA induces a downwash suction flow above the cathode, a wall-normal jet flow above the anode, and a counter-rotating vortex pair caused by near-wall jet impingement. With increasing discharge voltage, both the peak blowing velocity and centerline-jet decay rate increase, while the dimensionless total circulation decreases linearly. For different cases, the vortex-core spacing remains approximately unchanged at 0.43D.",

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T1 - Design and characterization of a virtual-dimple plasma actuator for turbulent skin-friction drag reduction

AU - Fang, Ziqi

AU - Zong, Haohua

AU - Wu, Yun

AU - Liang, Hua

AU - Cao, Rui

AU - Su, Zhi

AU - Hua, Weizhuo

PY - 2024/3/1

Y1 - 2024/3/1

N2 - A virtual-dimple plasma actuator (VDPA), capable of producing suction flow above a staggered array of circular anodes, is proposed for turbulent skin-friction drag reduction. Characteristics of the VDPA at different discharge voltages are studied using multi-slice stereoscopic particle image velocimetry and electrical measurements. Results indicate that the VDPA induces a downwash suction flow above the cathode, a wall-normal jet flow above the anode, and a counter-rotating vortex pair caused by near-wall jet impingement. With increasing discharge voltage, both the peak blowing velocity and centerline-jet decay rate increase, while the dimensionless total circulation decreases linearly. For different cases, the vortex-core spacing remains approximately unchanged at 0.43D.

AB - A virtual-dimple plasma actuator (VDPA), capable of producing suction flow above a staggered array of circular anodes, is proposed for turbulent skin-friction drag reduction. Characteristics of the VDPA at different discharge voltages are studied using multi-slice stereoscopic particle image velocimetry and electrical measurements. Results indicate that the VDPA induces a downwash suction flow above the cathode, a wall-normal jet flow above the anode, and a counter-rotating vortex pair caused by near-wall jet impingement. With increasing discharge voltage, both the peak blowing velocity and centerline-jet decay rate increase, while the dimensionless total circulation decreases linearly. For different cases, the vortex-core spacing remains approximately unchanged at 0.43D.

UR - https://www.scopus.com/pages/publications/85187235107

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DO - 10.1063/5.0197156

M3 - 文章

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VL - 36

JO - Physics of Fluids

JF - Physics of Fluids

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ER -

Design and characterization of a virtual-dimple plasma actuator for turbulent skin-friction drag reduction

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