Comparison of aerodynamic characteristics of wing dynamic stall under three typical jets control

Aiming at the dynamic stall problem that restricts the improvement of aircraft maneuver-ability, a new dynamic stall control method based on leading-edge Dual Synthetic Jets (DSJ) is proposed in this paper. The aerodynamic control characteristics and flow field evolution process of steady jet, Synthetic Jet (SJ) and DSJ in dynamic stall flow field are analyzed in detail, and the corresponding control mechanism is revealed. The strong ‘‘wall attachment effect” and ‘‘quasi-steady” characteristics of DSJ are found. The results show that the leading-edge jet technology can improve the dynamic stall flow field environment. For the whole pitching process, the average lift coefficients of steady jet, SJ and DSJ increased by 3.65%, 10.51% and 14.62% respectively, and the average drag coefficients decreased by 9.58%, 29.9% and 32.0% respectively. In the downward phase, the average lift coefficient increased by 16.31%, 26.72% and 35.88% respectively, and the average drag coefficient decreased by 26.21%, 50.46% and 54.28% respectively. Due to its strong ‘‘wall attachment effect” and ‘‘quasi-steady” characteristics, DSJ exhibits optimal control effect, showing its application potential in dynamic stall control.