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UID:0-320@aerospace.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20191111T163000

DTEND;TZID=Asia/Jerusalem:20191111T173000

DTSTAMP:20230527T132126Z

URL:https://aerospace.technion.ac.il/events/a-tale-of-two-experiments-in-u
 nsteady-and-turbulent-flows-boundary-layers-and-wind-turbines/

SUMMARY:A Tale of Two Experiments in Unsteady and Turbulent Flows: Boundary
  Layers and Wind Turbines
DESCRIPTION:Lecturer:Asst. Prof. Duvvuri Subrahmanyam\n Faculty:Department 
 of Aerospace Engineering\n Institute:Indian Institute of Science (IISc)\n 
 Location:Classroom 165\, ground floor\, Library\, Aerospace Eng.\n Zoom: \
 n Abstract: \n Details: \n In this talk I'll present two experimental inve
 stigations where unsteady and turbulent flow physics form the common under
 lying theme.\nThe first study\, which is fundamental in nature\, was aimed
  at obtaining insights into the dynamics of non-linear scale interactions 
 in a turbulent boundary layer. An active wall perturbation technique was u
 sed to apply external forcing to the flow in a targeted manner. This appro
 ach allowed for the transfer function(s) associated with interactions betw
 een specific scales (or modes) to be highlighted\, leading to an interesti
 ng set of observations with broad implications for turbulence modeling and
  flow control.\nThe second study\, which has a more applied flavor\, deals
  with the aerodynamics of vertical-axis wind turbine models at full dynami
 c similarity to field turbines. The use of compressed-air (up to 230 bar) 
 as the working fluid in these experiments provided access to very high Rey
 nolds numbers that reach into the asymptotic regime for performance. Resul
 ts from this study greatly aid in modeling efforts and can guide design co
 nsiderations for practical turbines.\nAt the end I will also give a brief 
 overview of the presently ongoing research activities in my group in the a
 rea of hypersonic flows.
CATEGORIES:Seminars
LOCATION:Classroom 165\, ground floor\, Library\, Aerospace Eng.

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