Reducing turbulent skin friction drag is a fundamental goal for aircraft transportation to conserve energy and decrease emissions. We introduce an annular dielectric barrier discharge plasma actuator (A-DBD-PA) that merges the advantages of near-wall micro-blowing with pulsed plasma flow control to reduce turbulence drag. Wind tunnel experiments on a flat plate assessing the performance of A-DBD-PA revealed that the wall-normal jet on the symmetry plane is critical for turbulent drag reduction in an unsteady flow field. As the duty cycle of plasma actuation increases, it steadies the wall-normal jet, which diminishes shear stress and velocity fluctuations in the boundary layer. This enhanced steadiness fosters induced vortices' formation and evolution, directly impacting the drag reduction rate. Duty cycles below 50% yield a limited drag reduction rate because the airflow's viscous effects predominate over the influence of plasma actuation. Conversely, duty cycles above 50% enhance the interaction of induced vortices, contributing to a stronger disturbance and more effective control, optimizing drag reduction rate up to a maximum of 5.197%.
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December 2023
Research Article|
December 13 2023
Turbulent skin-friction drag reduction by annular dielectric barrier discharge plasma actuator
Special Collection:
Turbulence in Plasmas and Fluids
Borui Zheng (郑博睿)
;
Borui Zheng (郑博睿)
a)
(Conceptualization, Data curation, Funding acquisition, Methodology, Project administration, Supervision, Writing – original draft, Writing – review & editing)
1
School of Automation and Information Engineering, Xi'an University of Technology
, Xi'an 710048, People's Republic of China
a)Author to whom correspondence should be addressed: narcker@xaut.edu.cn
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Deling Lin (林德岭);
Deling Lin (林德岭)
(Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Software, Supervision, Validation, Writing – original draft, Writing – review & editing)
1
School of Automation and Information Engineering, Xi'an University of Technology
, Xi'an 710048, People's Republic of China
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Shaojie Qi (齐少杰);
Shaojie Qi (齐少杰)
(Data curation, Writing – review & editing)
2
School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology
, Xi'an 710048, People's Republic of China
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Yuzhe Hu (胡宇喆);
Yuzhe Hu (胡宇喆)
(Investigation, Writing – review & editing)
2
School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology
, Xi'an 710048, People's Republic of China
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Yuanzhong Jin (金元中);
Yuanzhong Jin (金元中)
(Resources)
2
School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology
, Xi'an 710048, People's Republic of China
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Quanlong Chen (陈全龙)
;
Quanlong Chen (陈全龙)
(Funding acquisition, Resources, Writing – review & editing)
3
The Green Aerotechnics Research Institute of Chongqing Jiaotong University
, Chongqing 401120, People's Republic of China
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Dongliang Bian (卞栋梁);
Dongliang Bian (卞栋梁)
(Funding acquisition, Visualization)
4
Science and Technology on Plasma Dynamics Laboratory, Air Force Engineering University
, Xi'an 710038, People's Republic of China
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Rihua Yan (严日华)
Rihua Yan (严日华)
(Funding acquisition, Software)
5
School of Aeronautics, Northwestern Polytechnical University
, Xi'an 710072, People's Republic of China
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a)Author to whom correspondence should be addressed: narcker@xaut.edu.cn
Physics of Fluids 35, 125129 (2023)
Article history
Received:
August 15 2023
Accepted:
November 23 2023
Citation
Borui Zheng, Deling Lin, Shaojie Qi, Yuzhe Hu, Yuanzhong Jin, Quanlong Chen, Dongliang Bian, Rihua Yan; Turbulent skin-friction drag reduction by annular dielectric barrier discharge plasma actuator. Physics of Fluids 1 December 2023; 35 (12): 125129. https://doi.org/10.1063/5.0172381
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