Algorithms for Automatic Feedback Control of Aerodynamic Flows: Flow Control using CFD and Optimal Control Theory

CFD is now a mature technology and can be used as a design tool in addition to being used as an analysis tool. Shape optimization involves finding the shape (2D or 3D) that optimizes a certain performance index. Clearly, any optimum shape will be optimum only at the design point. What we need to do is to design and develop a feasible way of controlling the flow at any operating point such that the resulting performance is optimal. This work focuses on deriving algorithmic frameworks for the control of Aerodynamic Phenomena. In designing control laws, our philosophy has been to develop an algorithmic framework that enables treating a broad class of control problems. This ensures that once a framework is established, extensions to specific problems can be done with very little effort. The application of one such control law to the control of Flutter is discussed in detail. Flutter is an aero-structural instability that arises due to the adverse transfer of energy between the airplane structure and the surrounding fluid. This book is intended for graduate students and professionals working in CFD and Optimal Flow Control. Read more