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Research | Open Access

Experimental study on airfoil flow separation control via an air-supplement plasma synthetic jet

Ru-Bing Liu1,2 (), Wen-Tao Wei1,3, Hai-Peng Wan1, Qi Lin1,2, Fei Li4, Kun Tang5,6
School of Aerospace Engineering, Xiamen University, Xiamen 361102, China
Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance, Xiamen 361005, China
Chengdu Aircraft Design and Research Institute, Chengdu 610041, China
Shanghai Aerospace Control Technology Institute, Shanghai 201100, China
Rotor Aerodynamics Key Laboratory, China Aerodynamics Research and Development Center, Mianyang 621000, China
Science and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, Xi’an 710038, China
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Abstract

An air-supplement plasma synthetic jet (PSJ) actuator increases the air supplemental volume in the recovery stage and improves the jet energy by attaching a check valve to the chamber of a conventional actuator. To explore the flow control effect and mechanism of the air-supplement actuator, via particle image velocimetry experiments in a low-speed wind tunnel, the flow field and boundary layer characteristics of a two-dimensional airfoil surface under different actuation states were compared for different attack angles and jet orifices. The experimental results show that, compared with the conventional actuation state, the jet energy of the air-supplement PSJ is higher and the indirect mixing effect of the counter-vortex sequence produced by the jet-mainstream interaction is stronger. Furthermore, the boundary layer mixing effect is better, which can further suppress flow separation and improve the critical flow separation attack angle. Moreover, increasing the jet momentum coefficient can enhance the flow control effect. The findings of this study could provide guidance for the flow control application of air-supplement PSJs.

Keywords

Plasma synthetic jetCheck valveFlow separationActive flow controlAir-supplement

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Advances in Aerodynamics
Volume 4 Issue 1,
December 2022
Pages 34-34
DOI: 10.1186/s42774-022-00126-w
Cite this article:
Liu R-B, Wei W-T, Wan H-P, et al. Experimental study on airfoil flow separation control via an air-supplement plasma synthetic jet. Advances in Aerodynamics, 2022, 4(1): 34. https://doi.org/10.1186/s42774-022-00126-w
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