Closed-Loop Control of Lift for Longitudinal Gust Suppression at Low Reynolds Numbers

摘要

Active flow control (AFC) of lift in unsteady flow situations offers a number of performance benefits that are not achievable with a quasi-steady approach, such as extending the range and endurance of flight vehicles by energy extraction from atmospheric disturbances, suppressing the unsteady lift fluctuations caused by gusting flows, enhancing maneuverability, and enabling pinpoint perch landings. The focus here is on suppressing lift fluctuations in an unsteady freestream (simulating longitudinal gusts). In addition to providing a demonstration of the benefits and limitations of AFC in unsteady flows, gust-suppression techniques have the practical benefit of reducing loads on aircraft and enabling more stable platforms for sensors.