Experimental Assessment of the Active Flow Control over the Flight Deck of a Frigate
Evaluation expérimentale du contrôle actif d'écoulement sur le pont d'envol d'une frégate
Résumé
The airwake of a simplified ship model, representative of the geometry of a frigate at 1:50 scale, is studied experimentally in a wind tunnel. The shipboard landing operation requires a high workload from the pilots. The objective is to improve-in sense of pilot workload-the flow topology over the flight deck. For this purpose, active flow control is implemented. The slots are located along the sides of the hangar, three blowing speeds are studied and the orientation of the blowing is done with different angles. The analysis is based on stereo particle image velocimetry and pressure sensors. Results show a reduction of the recirculation area above the flight deck, observed at 0 and at 20 degrees yaw angle starboard too. Turbulent intensity increases in the recirculation bubble, not outside. At the landing point, the flow is no longer downward due to the control. Results show a small impact of the control in the presence of a rotor in a hover position over the flight deck.
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