Bubble Burst Control Using Smart Structure Sensor Actuators for Stall Suppression

摘要

The short-bubble burst control using the burst control plate that was incorporated in the smart structure sensor actuator system (in short, autonomous actuation system) was investigated on a NACA 631-012 airfoil section at a chord Reynolds number of 1.3 ×10~5. A method was developed (namely, the pressure-amplitude sense and feedback control method) for detecting the change in pressure level due to the existence of the short bubble at the front portion of the airfoil and for determining the optimum plate height at different angles of attack. The experiments were intended to validate 1) the feedback rule in the control loop and 2) the effectiveness of the burst control plate with autonomous actuation. The aerodynamic forces -acting on the airfoil were investigated by means of total force.