A REDUCED-ORDER MODEL FOR AEROELASTIC STUDIES ON AIRFOILS WITH ACTIVE HIGH-LIFT DEVICES

摘要

The application of circulation control allows shortening of runways which can be significant in particular cases. To study its influence on the aeroelastic behaviour of the airfoil, a simplified computational model is developed, which allows for systematic parameter variations. The model is based on modal reduction of the airfoil structure. An unsteady aerodynamic model is applied based on the results of numerical flow simulations. Investigation of aeroelastic stability leads to the usual phenomena of a conventional airfoil. Additionally, bending flutter occurs at high blowing rates of the Coanda stream and low velocities.