He-Sen Yang, Guang-Yin Zhao, Hua Liang, Biao Wei. Dynamic stall control over an airfoil by NS-DBD actuation[J]. Chinese Physics B, 2020, 29(10):
- Chinese Physics B
- Vol. 29, Issue 10, (2020)
![Flow field of airfoil dynamic stall within a pitch period.[13]](/Images/highlights-null.jpg)
Fig. 1. Flow field of airfoil dynamic stall within a pitch period.[13 ]
Fig. 2. Airfoil installation and experimental layout in wind tunnel.
Fig. 3. Airfoil oscillation drive device.
Fig. 4. Deployment of actuator at the leading edge of airfoil and electrical parameter measurement: (a) deployment of actuator. (b) system of electrical parameter measurement.
Fig. 5. Characteristics of NS-DBD in still air: (a) voltage and current curves of NS-DBD (V p – p = 13 kV), (b) discharge image of NS-DBD, and (c) shock wave induced by NS-DBD experimental results.
Fig. 6. Static experimental lift coefficient C L under different airfoil’s profile states.
Fig. 7. Baseline for various reduced frequencies of light dynamic stall.
Fig. 8. Flow control effects under light stall state (k = 0.05).
Fig. 9. Flow control effects under light stall state (k = 0.1).
Fig. 10. Flow control effects under light stall state (k = 0.15).
Fig. 11. Baseline for various reduced frequencies of deep dynamic stall.
Fig. 12. Flow control effects under deep stall state (k = 0.05).
Fig. 13. Flow control effects under deep stall state (k = 0.1).
Fig. 14. Flow control effects under deep stall state (k = 0.15).
Fig. 15. Flow field over a static airfoil with and without NS-DBD:[30 ] (a) plasma off and (b) plasma on.
Fig. 16. Flow field with and without actuation for dynamic stall: (a) base flow field at high α , (b) flow field with actuation at high α , (c) flow field with actuation when airfoil pitching down to a certain degree.
Fig. 17. Analysis for effect of various k at certain α on downstroke: (a) k = 0.05 pitch-down motion, (b) k = 0.1 pitch-down motion, and (c) k = 0.15 pitch-down motion.
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Table 1. List of dynamic stall states.
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