This work investigates the effects of a jet issued from the trailing edge of the wing on to the suction surface of a slotted flap, working at high angles of deflection, \(30^\circ \) to \(50^\circ \) . The deflection angle of the flap, the jet velocity, and the jet temperature affects the aerodynamic performance of the wing. Three different jet velocities at the same jet temperature, three different jet temperatures at the same jet velocity, and three different flap deflection angles at the same jet inlet parameters are used to study these effects. The effect of the jet is analyzed using pressure, temperature, and wall shear stress profiles on the surfaces of the wing and the flap. Deviations in lift and drag of the wing and the flap are analyzed. It was found that the jet flushes out the flow separation over the flap, resulting in increased lift. Due to the Coandă effect, the jet attaches itself to the suction surface of the flap. At very high deflection angles, the jet cannot completely remove the flow separation. The ventilated flow from the slot effectively insulates the flap surface from the high temperatures of the trailing edge jet.
