Unconventional Applications and New Approaches for Flow Control

This article consists of a review of unconventional applications of flow control interspersed with new techniques for actuation. The flow control studies are aimed at solving a broad set of aerodynamic and propulsion flow problems targeting commercial and military applications. The applications range from aerodynamic performance improvements, up to solutions to airplane operational issues. The flow control techniques are used for reducing drag, controlling flow separation, as well as manipulating vortical flow structures for achieving a desired objective. An important driver for the development of the new techniques is a result of particular focus on issues of practical integration, where actuation input is within available resources onboard. A systematic approach based on computational simulations is used to provide insight into the flow problem, facilitate root cause analyses, and develop flow control approaches. Both fluidic actuation and morphing structures are considered. Actuator concepts and aspects of system integration are also introduced.