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SUMMARY:MechE Colloquium: Numerical techniques for the analysis and contro
 l of flow instabilities in turbomachinery
DTSTART:20250318T120000
DTEND:20250318T130000
DTSTAMP:20260526T225009Z
UID:712685f10f5e87742dc522435ca176a5e650e15c10c6f06ec7df37d1
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Miguel Fosas de Pando\, Department Ingeniería Mecáni
 ca y Diseño Industrial\, University of Cádiz\nAbstract: The performance
  of turbomachinery is often constrained by the onset of flow instabilities
  such as surge or rotating stall. In this talk I outline a numerical frame
 work designed for the analysis of these instabilities\, their receptivity 
 mechanisms\, and their manipulation through optimization techniques. A lin
 ear stability analysis of flow through a representative linear cascade tha
 t incorporates the global interaction between blade passages is performed\
 , and subsequently extended to rotor-stator configurations by introducing 
 a novel time-accurate sliding plane that facilitates the computation of gr
 adient information using the adjoint operator. This study reveals self-exc
 ited instability processes within a laminar separation bubble\, at the tra
 iling edge\, and within the shear layers on both sides of the blade\, in a
 ddition to cross-interaction between different blade passages of the rotor
  and stator cascades. Finally\, a surrogate-based optimization technique i
 ncorporating gradient information\, known as G-DYCORS\, is presented and a
 pplied to the reduction of pressure-loss in linear cascades using wall act
 uation.\n\n\nBiography: Miguel Fosas de Pando is an Associate Professor i
 n Fluid Mechanics at the University of Cádiz. After graduating in Aerospa
 ce Engineering at the University of Seville (2009)\, he obtained PhD degre
 e in Mechanical Engineering at Ecole Polytechnique (2012)\, where he also 
 held a postdoctoral position. Following a David Crighton Fellowship at the
  University of Cambridge (2014)\, he joined the School of Engineering at t
 he University of Cádiz. His research interests are computational fluid dy
 namics\, numerical optimization and their applications in aeroacoustics an
 d hydrodynamic stability.
LOCATION:MED 0 1418 https://plan.epfl.ch/?room==MED%200%201418 https://epf
 l.zoom.us/j/64267570786
STATUS:CONFIRMED
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