This study focuses on the aerodynamic prediction and validation of the static and dynamic forces on the DLR-F19, which is based on the Stability and Control CONfiguration (SACCON) uninhabitated combat air vehicle (UCAV) geometry with the addition of two trailing edge control surfaces on each wing. The vehicle exhibits significant nonlinear aerodynamic characteristics with respect to angle of attack, control surface deflections and frequency of motion even at low angles of attack, which makes the task of predicting of aerodynamic characteristics very complicated. A hybrid unstructured overset mesh was generated to simulate, in the Cobalt flow solver, the flow fields around the vehicle and to allow movement of the control surfaces. The results include comparisons between computational aerodynamic predictions and static and dynamic experimental data at low speeds. Predictions are shown for different turbulence models at selected flight conditions. Compared quantities include the force and moment coefficients and surface pressure tap data taken at four stations on the fuselage and wing. Static experiments correspond to different control surface settings at low to high angles of attack and sideslip. Dynamic tests were performed in pitch and yaw directions and different oscillation frequencies. Finally, the effect of the overset method compared with conventional single grids was also investigated.
展开▼
