Sensitivity gradients of surface geometry modifications based on stability analysis of compressible flows

Martínez-Cava Aguilar, Alejandro and Chávez Modena, Miguel and Valero Sánchez, Eusebio and Vicente Buendía, Javier de and Ferrer Vaccarezza, Esteban (2020). Sensitivity gradients of surface geometry modifications based on stability analysis of compressible flows. "Physical Review Fluids", v. 5 (n. 6); pp.. https://doi.org/10.1103/PhysRevFluids.5.063902.

Description

Title: Sensitivity gradients of surface geometry modifications based on stability analysis of compressible flows
Author/s:
  • Martínez-Cava Aguilar, Alejandro
  • Chávez Modena, Miguel
  • Valero Sánchez, Eusebio
  • Vicente Buendía, Javier de
  • Ferrer Vaccarezza, Esteban
Item Type: Article
Título de Revista/Publicación: Physical Review Fluids
Date: 18 June 2020
Volume: 5
Subjects:
Freetext Keywords: Fluid dynamics; Flow instability; Compressible flows
Faculty: E.T.S. de Ingeniería Aeronáutica y del Espacio (UPM)
Department: Matemática Aplicada a la Ingeniería Aeroespacial
UPM's Research Group: Métodos y Aplicaciones Numéricas a la Tecnología Aeroespacial
Creative Commons Licenses: None

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Abstract

We derive a discrete framework for the calculation of eigenvalue sensitivity to geometric deformations. We apply the technique to the steady compressible Navier-Stokes and Reynolds-averaged Navier-Stokes (RANS) flows. The analysis enables one to control (reduce or increase) the amplification rate or frequency associated to the least stable global mode, which is identified using stability analysis. A methodology using a discrete framework is proposed, allowing one to recover the gradients in compressible and turbulent flows. The potential of the resulting shape gradients is evaluated on the well-known circular cylinder flow problem and on a RANS turbulent flow scenario to control the buffet onset on a NACA0012 airfoil. The predicted deformations show excellent performance on the stabilization or excitation, and frequency control, of the global modes and for the two cases tested.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainRTI2018-097075-B-I00SIMOPAIREusebio Valero SánchezSimulaciones de alta precisión y modelización para diseño óptimo aeronáutico

More information

Item ID: 62747
DC Identifier: http://oa.upm.es/62747/
OAI Identifier: oai:oa.upm.es:62747
DOI: 10.1103/PhysRevFluids.5.063902
Official URL: https://journals.aps.org/prfluids/abstract/10.1103/PhysRevFluids.5.063902
Deposited by: Sr Alejandro Martinez-Cava
Deposited on: 18 Jun 2020 14:17
Last Modified: 18 Jun 2020 14:17
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