Design Models and Model Based Design in Fluid Flow With Application to Micro Air Vehicles

Our focus has been on structural enablers for very low order design models and for model-based flow control, including the flow physics underpinnings of low order flow models. Basic theory investigations concentrated primarily on Galerkin models We derived from the NSE the essential role and form of mean field models and developed a novel none-equilibrium statistical closure and implied sub-grid turbulence models. Mean-field models now predict lift dynamics and high frequency actuation. With harmonically-pure mode-sets, mode interpolation maintains minimum model order across changing operating conditions, and is assisted by a new. efficient POD computation. Experimental studies were done in conjunction with a related MURl project, and complemented independently supported, long-term international team collaborations. We explored new feedback paradigms, including implementing duty ratio feedback modulation of pulsating jets, validated by MAV lift enhancement, and Lagrangian models in feedback for drag reduction behind a 3D bluff body. The research is presented in 7 journal papers plus 2 under review1 in preparation. 2 Book chapters, 17 refereed conference papers, 14 conference abstracts, a forthcoming book and an international short course.