Multiscale Vortex Characteristics of Dynamic Stall from Empirical Mode Decomposition

What is it about?

Dynamic stall is an unsteady aerodynamic phenomenon that leads to complex flow features over wing or rotor surfaces, as well as an overall impairment of aerodynamic vehicle performance. By better understanding this complex process, new efforts can be taken to control or prevent dynamic stall. This study documents the use of the empirical mode decomposition, which allows the complex flow field to be distilled into an array of simpler contributions. By studying these contributions individually in the current study, a new understanding of the overall dynamic stall process is obtained.

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