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SUMMARY:Unsteadiness of Shock Wave / Turbulent Boundary Layer Interactions
  - Noel Clemens\, University of Texas at Austin
DTSTART:20220304T160000Z
DTEND:20220304T170000Z
UID:TALK169820@talks.cam.ac.uk
CONTACT:Prof. Jerome Neufeld
DESCRIPTION:Shock wave / boundary layer interactions are an important feat
 ure of high-speed flow that occur in supersonic and hypersonic aircraft in
 lets\, aircraft control surfaces\, missile base flows\, nozzles\, and rota
 ting machinery. These interactions are often associated with severe bounda
 ry layer separation\, which is highly unsteady\, and exhibits high fluctua
 ting pressure and heat loads. The unsteady motions are characterized by a 
 wide range of frequencies\, including low-frequency motions that are about
  two orders of magnitude lower than the integral-scale fluctuations in the
  upstream boundary layer. The low-frequency motions are particularly probl
 ematic for aircraft structures as they can excite high-amplitude vibration
  of thin panels\, which can lead to fatigue and failure. In this seminar\,
  we will discuss experimental research on various types of shock wave / bo
 undary layer interactions that we have conducted over the past 20 years. T
 he discussion will focus on the use of high-speed PIV and pressure sensiti
 ve paint to investigate the physical mechanisms that drive the separated f
 low unsteadiness in 2D and 3D interactions.
LOCATION:Fluid Mechanics Webinar Series
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