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SUMMARY:MechE Colloquium: Dynamic Stall of Pitching Wings at Transitional 
 Reynolds Numbers
DTSTART:20180522T121500
DTEND:20180522T131500
DTSTAMP:20260924T102420Z
UID:8b648bd3cd25b4845afb19c13edf65c2488db9868752e7d188c8ee1a
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Phillip J. Ansell\, Aerodynamics and Unsteady Flows Rese
 arch Group\, Department of Aerospace Engineering\, University of Illinois\
 nAbstract:\nDynamic stall is a complex phenomenon in aerodynamics\, which 
 occurs for wings and bodies subject to unsteady separation due to rapid ch
 anges in relative freestream conditions. The onset of dynamic stall is ass
 ociated with drastic increases in flow field unsteadiness\, producing high
  levels of airframe vibratory loading as well as an overall impairment of 
 vehicle aerodynamic performance. While it is most commonly regarded as a h
 azard for rotorcraft in forward flight\, dynamic stall can also occur for 
 wind turbines and fixed wing aircraft under severe gust loading and during
  rapid maneuvers.  The transient and highly unsteady nature of these type
 s of flow fields make them substantially difficult to predict and simulate
 \, particularly with the increases in the distribution of characteristic l
 ength scales brought about by increasing Reynolds number.   In order to b
 etter understand the flow physics of dynamic stall\, a series of experimen
 tal campaigns have been performed at the University of Illinois on pitchin
 g airfoil and finite wing geometries.  These studies cover a range of tra
 nsitional Reynolds numbers (1 × 105 – 1 × 106) and focus on fundament
 al aspects of the flow field leading up to the emergence of dynamic stall 
 vortex structures.  Specific attention is given to characterizing oscilla
 tory scales of interest\, identification of separation bubble structures a
 nd off-body flow structures\, and understanding the influence of the trail
 ing vortex system on unsteady separation.\n\nBio:\nDr. Ansell is an Assist
 ant Professor in the Department of Aerospace Engineering at the University
  of Illinois at Urbana-Champaign.  He earned his BS in Aerospace Engineer
 ing from Penn State University\, and his MS and Ph.D. in Aerospace Enginee
 ring from the University of Illinois at Urbana-Champaign.  He is the dire
 ctor of the Aerodynamics and Unsteady Flows research group at Illinois\, w
 hich specializes in subsonic and transonic experimental research on flow c
 ontrol\, unsteady aerodynamics\, and novel aerodynamic configurations.  H
 e 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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