Numerical developments in unsteady aerodynamic flows

D. Drikakis, G. Barakos

Research output: Contribution to conferencePaper

2 Citations (Scopus)

Abstract

The paper summarises recent developments pursued by the unsteady aerodynamics group at QMW. These include the development of computational fluid dynamics methods and validation of turbulence models for essentially unsteady flows with moving boundaries as well as investigation of various unsteady aerodynamic phenomena including dynamic stall, buffet, flutter and unsteady shock-wave diffraction. Overall, these studies have so far shown that simulations of unsteady aerodynamic flows which are strongly affected by turbulence, can provide a fair qualitative picture in most of the cases, but there are still many open issues regarding the quantitative agreement between experiments and simulations. Particular challenges and remaining open questions appear in the case of unsteady flows around pitching and oscillating aerofoils featuring dynamic stall. The various results indicate some strengths of the Godunov-type methods, implicit solvers, as well as linear, non-linear (eddy-viscosity-based) and Reynolds-stress models employed in this study, but they also reveal weaknesses associated in particular with modelling issues of high Reynolds number compressible flows.

Conference

ConferenceEuropean Congress on Computational Methods in Applied Sciences and Engineering, ECCOMAS 2000
Abbreviated titleECCOMAS 2000
CountrySpain
CityBarcelona
Period11/09/0014/09/00

Fingerprint

Aerodynamics
Unsteady Flow
Wave Diffraction
Eddy Viscosity
Reynolds Stress
Flutter
Moving Boundary
Implicit Method
Compressible Flow
Turbulence Model
Computational Fluid Dynamics
Shock Waves
Reynolds number
Turbulence
Simulation
Modeling
Experiment
Model

Keywords

  • buffet
  • dynamic stall
  • flutter
  • implicit schemes
  • oscillating/pitching aerofoils
  • Riemann solvers
  • shock-diffraction
  • turbulence modelling
  • unsteady flows
  • computational fluid dynamics methods

Cite this

Drikakis, D., & Barakos, G. (2000). Numerical developments in unsteady aerodynamic flows. Paper presented at European Congress on Computational Methods in Applied Sciences and Engineering, ECCOMAS 2000, Barcelona, Spain.
Drikakis, D. ; Barakos, G. / Numerical developments in unsteady aerodynamic flows. Paper presented at European Congress on Computational Methods in Applied Sciences and Engineering, ECCOMAS 2000, Barcelona, Spain.20 p.
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keywords = "buffet, dynamic stall, flutter, implicit schemes, oscillating/pitching aerofoils, Riemann solvers, shock-diffraction, turbulence modelling, unsteady flows, computational fluid dynamics methods",
author = "D. Drikakis and G. Barakos",
year = "2000",
month = "9",
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note = "European Congress on Computational Methods in Applied Sciences and Engineering, ECCOMAS 2000, ECCOMAS 2000 ; Conference date: 11-09-2000 Through 14-09-2000",

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Drikakis, D & Barakos, G 2000, 'Numerical developments in unsteady aerodynamic flows' Paper presented at European Congress on Computational Methods in Applied Sciences and Engineering, ECCOMAS 2000, Barcelona, Spain, 11/09/00 - 14/09/00, .

Numerical developments in unsteady aerodynamic flows. / Drikakis, D.; Barakos, G.

2000. Paper presented at European Congress on Computational Methods in Applied Sciences and Engineering, ECCOMAS 2000, Barcelona, Spain.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Numerical developments in unsteady aerodynamic flows

AU - Drikakis, D.

AU - Barakos, G.

PY - 2000/9/14

Y1 - 2000/9/14

N2 - The paper summarises recent developments pursued by the unsteady aerodynamics group at QMW. These include the development of computational fluid dynamics methods and validation of turbulence models for essentially unsteady flows with moving boundaries as well as investigation of various unsteady aerodynamic phenomena including dynamic stall, buffet, flutter and unsteady shock-wave diffraction. Overall, these studies have so far shown that simulations of unsteady aerodynamic flows which are strongly affected by turbulence, can provide a fair qualitative picture in most of the cases, but there are still many open issues regarding the quantitative agreement between experiments and simulations. Particular challenges and remaining open questions appear in the case of unsteady flows around pitching and oscillating aerofoils featuring dynamic stall. The various results indicate some strengths of the Godunov-type methods, implicit solvers, as well as linear, non-linear (eddy-viscosity-based) and Reynolds-stress models employed in this study, but they also reveal weaknesses associated in particular with modelling issues of high Reynolds number compressible flows.

AB - The paper summarises recent developments pursued by the unsteady aerodynamics group at QMW. These include the development of computational fluid dynamics methods and validation of turbulence models for essentially unsteady flows with moving boundaries as well as investigation of various unsteady aerodynamic phenomena including dynamic stall, buffet, flutter and unsteady shock-wave diffraction. Overall, these studies have so far shown that simulations of unsteady aerodynamic flows which are strongly affected by turbulence, can provide a fair qualitative picture in most of the cases, but there are still many open issues regarding the quantitative agreement between experiments and simulations. Particular challenges and remaining open questions appear in the case of unsteady flows around pitching and oscillating aerofoils featuring dynamic stall. The various results indicate some strengths of the Godunov-type methods, implicit solvers, as well as linear, non-linear (eddy-viscosity-based) and Reynolds-stress models employed in this study, but they also reveal weaknesses associated in particular with modelling issues of high Reynolds number compressible flows.

KW - buffet

KW - dynamic stall

KW - flutter

KW - implicit schemes

KW - oscillating/pitching aerofoils

KW - Riemann solvers

KW - shock-diffraction

KW - turbulence modelling

KW - unsteady flows

KW - computational fluid dynamics methods

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M3 - Paper

ER -

Drikakis D, Barakos G. Numerical developments in unsteady aerodynamic flows. 2000. Paper presented at European Congress on Computational Methods in Applied Sciences and Engineering, ECCOMAS 2000, Barcelona, Spain.