Water Tunnel Flow Visualization Due to Canard Deflection Effect on Aircraft to Improve Stall Delay Performance

摘要

One of the advantages of the fighter is the ability to perform maneuver movements. Modification of flow along the fuselage becomes very important in creating the ability to maneuver to avoid the stall. Addition of canard on the fuselage will modify the flow so that it can delay the occurrence of the stall. The canard configuration will determine the extent to which the aircraft can hold on so as not to fall at a high angle of attack. In this study will examine how the configuration of canard deflection angle can optimize the downwash flow of the canard and the flow interaction along the main wing to keep the streamline and delay the stall. The use of visualization method using water tunnel will give detail result visually or aerodynamic force that happened. Also, the use of computational fluid dynamics (CFD) computation method is used as validation of experimental data to obtain accurate results. The results show that the deflection angle setting can delay the occurrence of aircraft stalls. At the canard deflection angle of 30°-40° could delay the stall until the maximum angle of attack 70°.