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SUMMARY:IGM Colloquium: Dynamic Stall of Pitching Wings at Transitional Re
 ynolds Numbers
DTSTART:20180522T121500
DTEND:20180522T131500
DTSTAMP:20260609T230358Z
UID:c1b150f930982c0542fb55d3536c95a7f6b3d7e93dc39311d194df1e
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Phillip J. Ansell\, University of Illinois\nAbstract: Dy
 namic stall is a complex phenomenon in aerodynamics\, which occurs for win
 gs and bodies subject to unsteady separation due to rapid changes in relat
 ive freestream conditions. The onset of dynamic stall is associated with d
 rastic increases in flow field unsteadiness\, producing high levels of air
 frame vibratory loading as well as an overall impairment of vehicle aerody
 namic performance. While it is most commonly regarded as a hazard for roto
 rcraft in forward flight\, dynamic stall can also occur for wind turbines 
 and fixed wing aircraft under severe gust loading and during rapid maneuve
 rs.  The transient and highly unsteady nature of these types of flow fiel
 ds make them substantially difficult to predict and simulate\, particularl
 y with the increases in the distribution of characteristic length scales b
 rought about by increasing Reynolds number.   In order to better understa
 nd the flow physics of dynamic stall\, a series of experimental campaigns 
 have been performed at the University of Illinois on pitching airfoil and 
 finite wing geometries.  These studies cover a range of transitional Reyn
 olds numbers (1 × 105 – 1 × 106) and focus on fundamental aspects of 
 the flow field leading up to emergence of dynamic stall vortex structures.
   Specific attention is given to characterizing oscillatory scales of int
 erest\, identification of separation bubble structures and off-body flow s
 tructures\, and understanding the influence of the trailing vortex system 
 on unsteady separation.\n\nBio: Dr. Ansell is an Assistant Professor in th
 e Department of Aerospace Engineering at the University of Illinois at Urb
 ana-Champaign.  He earned his BS in Aerospace Engineering from Penn State
  University\, and his MS and PhD in Aerospace Engineering from the Univers
 ity of Illinois at Urbana-Champaign.  He is the director of the Aerodynam
 ics and Unsteady Flows research group at Illinois\, which specializes in s
 ubsonic and transonic experimental research on flow control\, unsteady aer
 odynamics\, and novel aerodynamic configurations.  He has received Young 
 Investigator Awards from AFOSR (2015) and ARO (2017)\, and was included in
  the Forbes 30 Under 30 list in 2016 under the Science category.
LOCATION:MED 0 1418 https://plan.epfl.ch/?room==MED%200%201418
STATUS:CONFIRMED
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