Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Eigenmode Optimization of a Contraction Channel Based on Stability Analysis
Year:2018
Research Areas
  • Fluid mechanics,
  • Hidrodynamics stability,
  • Mathematical programming, optimal and variational techniques
Information
Abstract
This work studies flow control in a channel flow with a sudden geometry contraction. Optimization investigations have been carried out aiming at minimizing the amplification rate of the most unstable mode, to keep the symmetric flow topology in the contraction channel. In this framework, the DLR-TAU code is employed to obtain the compressible base flow solution, from which the critical Reynolds numbers for the bifurcations have been found. A first-discretize-then-linearize approach was used, taking advantage of the linear Jacobian matrix implementation present in the DLR-TAU code for stability analysis, from which the eigenmodes responsible for the bifurcations are obtained. A geometry parametrized representation, an FFD mesh deformation program and a dynamically updated RBF surrogate model are developed to drive the optimization investigation. In this investigation, geometry configurations with negative amplification rates have been obtained, making the eigenmodes stable. The potential of the method is illustrated by the increase of critical Reynolds number of bifurcation.
International
Si
Congress
ECCM-ECFD 2018
960
Place
Glasgow, UK
Reviewers
No
ISBN/ISSN
978-84-947311-6-7
Start Date
11/05/2018
End Date
11/05/2018
From page
4299
To page
4310
Proceedings of the 7th. European Conference on Computational Fluid Dynamics ECFD 7
Participants
  • Autor: Yinzhu Wang (UPM)
  • Autor: Alejandro Martinez-Cava Aguilar (UPM)
  • Autor: Eusebio Valero Sanchez (UPM)
  • Autor: Yao Zheng (Zhejian University)
  • Autor: Esteban Ferrer Vaccarezza (UPM)
Research Group, Departaments and Institutes related
  • Creador: Centro o Instituto I+D+i: Centro de Investigación en Simulación Computacional
  • Departamento: Matemática Aplicada a la Ingeniería Aeroespacial
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