Experimental study on flow control of asymmetric vortex over the leeward region of the head of the slender body by sliding discharge plasma actuation

JIN Yuanzhong; ZHENG Borui; YU Minghao; LIU Yuanpeng; ZHANG Qian; SUN Zhengzhong; YU Tao

doi:10.11729/syltlx20210101

Volume 36 Issue 5

Sep. 2022

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Journal of Experiments in Fluid Mechanics > 2022 > 36(5): 43-51. > DOI: 10.11729/syltlx20210101

JIN Y Z，ZHENG B R，YU M H，et al. Experimental study on flow control of asymmetric vortex over the leeward region of the head of the slender body by sliding discharge plasma actuation[J]. Journal of Experiments in Fluid Mechanics, 2022，36（5）：43-51.. DOI: 10.11729/syltlx20210101

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Experimental study on flow control of asymmetric vortex over the leeward region of the head of the slender body by sliding discharge plasma actuation

1.
Xi’an University of Technology, Xi'an　710048, China
2.
City, University of London, London　EC1V 0HB, UK
3.
The Green Aerotechnics Research Institute of Chongqing Jiaotong University, Chongqing　401135, China

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Received Date: August 22, 2021
Revised Date: September 24, 2021
Accepted Date: November 08, 2021
Available Online: February 16, 2022

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Abstract

Abstract

When the aircraft flies at a high angle of attack, the flow field on the leeward surface of the slender body evolves in a complicated manner, and asymmetric vortices appear, generating random lateral forces, which greatly affect the maneuverability and agility of the aircraft. In order to solve this problem, a sliding discharge plasma actuator with an along-stream layout was used to conduct wind tunnel experiments on a slender body model, combined with pressure measurement and particle image velocimetry（PIV）. The experimental results show that the actuation voltage of 10 kV is the threshold voltage at which the flow control starts to take effect. When the velocity of the incoming flow is 10 m/s（Re=0.8×10⁵）, the angle of attack is 45°, and the actuation voltage is 16 kV, the best flow control effect can be achieved at the normalized pulse frequency of 1.96, the lateral force coefficient can be reduced by 83.48%. However, as the flow velocity increases, the flow control effect becomes weaker gradually and is expected to disappear at 26 m/s.
- high angle of attack,
- asymmetric vortex,
- Particle Image Velocimetry（PIV）,
- sliding discharge

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Experimental study on flow control of asymmetric vortex over the leeward region of the head of the slender body by sliding discharge plasma actuation

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