Fig. 1

Configuration of PSJA［22］

Fig. 2

Configuration of airfoil and location of PSJA arrangement

Table 1

Location of actuator arrangement

Fig. 3

Grid division of flow field

Table 2

Number of grids and calculation results of CL and CD

Fig. 4

Experimental setup

Fig. 5

Simulation and experimental results of model pressure coefficient when AOA=4°

Fig. 6

Simulation and experimental results of vertical distance of PSJA diffracted wave moving bow shock wave when AOA=4°

Fig. 7

Superposition of simulation and experimental results of flow field density gradient when AOA=4°

Fig. 8

Variation of lift-drag characteristics of hypersonic airfoil with angle of attack

Fig. 9

Variation of lift-drag characteristics of airfoil with angle of attack when PSJA cavity is arranged at different geometric positions （without excitation）

Fig. 10

Effect of cavity on temperature of flow field in airfoil head region when AOA=4° （y=0 mm）

Fig. 11

Variation of lift-drag characteristics of airfoil with angle of attack relative to airfoil body when PSJA cavity is arranged at different geometric positions （without excitation）

Fig. 12

Variation of lift-drag characteristics of airfoil with time when PSJA is arranged at different geometric positions with AOA=4°（with excitation）

Fig. 13

Variation of density gradient of flow field when PSJA is arranged at Position 5 with AOA=4°

Fig. 14

Variation of temperature and density gradient of flow field when PSJA is arranged at Position 5 with AOA=4°

Fig. 15

Variation of density gradient of flow field when PSJA is arranged at Position 6 with AOA=4°

Fig. 16

Variation of temperature of flow field when PSJA is arranged at Position 6 with AOA=4°

Fig. 17

Mechanism of aerodynamic excitation of hypersonic airfoils by PSJA

Fig. 18

Time-averaged variation of airfoil lift-drag characteristics when PSJA is arranged at different geometric positions （with excitation）

Fig. 19

Time-averaged variation of airfoil lift-drag characteristics relative to airfoil body when PSJA is arranged at different geometric positions （with excitation）

Fig. 20

Time-averaged variation of airfoil lift-drag characteristics relative to airfoil arranged PSJA cavity when PSJA is arranged at different geometric positions （with excitation）

Fig. 21

Effect of PSJA on time-averaged lift-drag ratio of airfoil in different areas of airfoil （with excitation）

Fig. 22

Effect of frequency on lift-drag ratio of airfoil at same pulse width when AOA=4°

Fig. 23

Effect of pulse width on lift-drag ratio of airfoil with same frequency when AOA=4°

Fig. 24

Curves relationship between FK and τ