Experimental study on vortex-control technology of canard-spanwise synthetic jet actuators on close-coupled canard configuration

Combining with the advantage of the close-coupled canard configuration and wing-spanwise blowing, the indirect-vortex-control technology of canard-spanwise synthetic jet has been used to improve the high-attack and post-stall maneuverability of fighter. By making use of the advantageous interaction between canard and wing vortex, synthetic jet can strengthen the canard vortex directly and strengthen the wing vortex indirectly .In this paper, on basis of wind-tunnel force and pressure measurement, the effect of canard-spanwise synthetic jet for the close-coupled canard configuration on lift increment was studied. At different Reynolds numbers, the experiment studied the relations between synthetic jet and the aerodynamic force of canard configuration, by changing the frequency of synthetic jet. This experimental study can be seen as a technique reserve for the fighter of the new generation.