MAE Seminar- Turbulent Separation on Stalled Airfoils

Department of Mechanical and Aerospace Engineering

Douglas W. Carter, PH.D.

POSTDOCTORAL RESEARCH, University of Southampton, UK

Monday, December 13^th

1:00-2:00pm

Link 263B

https://syracuseuniversity.zoom.us/j/91085510353?pwd=dUlCV3pyTEFxQW9VWm5qaVRRc3VCdz09

Abstract:  Turbulent separated airfoils are commonly encountered over a range of engineering applications. Their unsteady and chaotic nature leads to complex behavior and produces undesirably large variations in hydrodynamic forces. In this talk two distinct experimental investigations will be presented: one data-driven analysis focused on predicting the state of a turbulent separated flow using probes and one analysis focused on the dynamics. Time-resolved planar particle image velocimetry is presented for two airfoils, a symmetric NACA 0012 and a cambered NACA 65-410, at a chord-based Reynolds number Re_c = 71000 over a range of angles of attack. For the flow prediction from probes, the efficacy using both linear compressive sensing techniques as well as non-linear machine learning techniques will be quantified and discussed. For the dynamics, a specific non-dimensional frequency is identified from the time-varying circulation and used to motivate a conditional analysis to extract coherent features underlying the turbulence. Implications and future directions will be discussed.

Dr. Douglas W. Carter is an experimentalist in fluid mechanics currently at the University of Southampton as a Postdoctoral Research Associate. He earned a B.Sc. in Mechanical Engineering from the University of New Hampshire in 2014 and a M.Sc. and Ph.D. in Aerospace Engineering and Mechanics from the University of Minnesota in 2017 and 2019, respectively. His research interests encompass a range of turbulent flows in aeronautical and environmental engineering applications measured by experiment, including leveraging data-driven techniques for noise reduction and dynamical insight.

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