Designing and Testing Active Flow Control Systems at the Junction of Ultra-High Bypass Ratio Engines and the Wing

Kurzfassung

In current aircraft, the maximum local lift is significantly improved with strakes mounted on the inboard side of the engine nacelle. Yet, the aerodynamic effect of strakes is limited and for modern VHBR engines the problem of possible local flow separation persists leaving further space for optimizing high-lift performance. With the upcoming introduction of highly efficient and ecologic UHBR engines, slat-cut-outs will likely become larger and the problem will even become worse. The objective of this project is to overcome the problem by actively suppressing the local flow separation linked to the wing/pylon junction by means of AFC through energizing the flow with fluidic jets. Two technological approaches are pursued: a) pulsed jet actuators with and b) without net mass flux (here: Synthetic Jet Actuators).