Identifying the Flow Physics and Modeling Transient Forces on Two-Dimensional Wings
Technical Report,01 Mar 2012,01 Sep 2015
Princeton University Princeton United States
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The main objective of the work described in this report is to better understand the flow physics of aircraft wings undergoing highly unsteady maneuvers. Reduced-order models play a central role in this study, both to elucidate the overall dynamical mechanisms behind various flow phenomena such as dynamic stall and vortex shedding, and ultimately to guide flight control design for vehicles for which these unsteady phenomena are important. Our approach builds upon recent advances in understanding the dynamics of these unsteady flows, and uses state-of-the-art techniques, both for measuring these phenomena in experiments using an unsteady wind tunnel, and for analyzing the data and developing reduced-order modelsusing techniques such as the Eigen system Realization Algorithm and variants of Dynamic Mode Decomposition.