Corpus ID: 59568439

NUMERICAL MODELLING OF A PITCHING AIRFOIL

@inproceedings{Ahmad2010NUMERICALMO,
  title={NUMERICAL MODELLING OF A PITCHING AIRFOIL},
  author={K. A. Ahmad and M. Z. Abdullah and J. Watterson},
  year={2010}
}
The RANS code Fluent TM 6.1 is used to predict the flow field around a pitching NACA 0012 airfoil. A hybrid mesh was employed in the computational domain and different mesh configurations are tested and the results are compared. Twoequation turbulence models namely k-є, r k- є, k-ω, and SST k-ω were tested and their results are compared. The turbulence model that gives the best agreement with the experimental data for 2D case is SST k-ω with y+ value set to 1. Mesh and time step dependency… Expand

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References

SHOWING 1-10 OF 10 REFERENCES
Simulation of dynamic stall for a NACA 0012 airfoil using a vortex method
Abstract The unsteady, incompressible, viscous laminar flow over a NACA 0012 airfoil is simulated, and the effects of several parameters investigated. A vortex method is used to solve theExpand
Computation of oscillating airfoil flows with one- and two-equation turbulence models
The ability of one- and two-quation turbulence models to predict unsteady separated flows over airfoils is evaluated. An implicit, factorized, upwind-biased numerical scheme is used for theExpand
THEORETICAL AND NUMERICAL STUDIES OF OSCILLATING AIRFOILS
Unsteady flowfields around airfoils oscillating in pitch and associated dynamic stall phenomena are investigated. A viscous flow analysis and a simplified vortical flow analysis, both based on anExpand
Further experiments on vortex formation around an oscillating and translating airfoil at large incidences
The starting flows past a two-dimensional NACA 0012 airfoil translating and oscillating at large incidences are investigated by visualization experiments and numerical calculations. The airfoil modelExpand
Unsteady separated flows over manoeuvring lifting surfaces
  • G. Barakos, D. Drikakis
  • Physics
  • Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences
  • 2000
Numerical simulations of dynamic–stall phenomena have been performed using an implicit unfactored Navier–Stokes solver and various turbulence closures, including linear and nonlinear low–ReExpand
General Theory of Aerodynamic Instability and the Mechanism of Flutter
The aerodynamic forces on an oscillating airfoil or airfoil-aileron combination of three independent degrees of freedom were determined. The problem resolves itself into the solution of certainExpand
Experimental investigation of the flow field of an oscillating airfoil and estimation of lift from wake surveys
The flow field of an airfoil oscillated periodically over a reduced frequency range, 0 ≤ k ≤ 1.6, is studied experimentally at chord Reynolds numbers of R c = 22000 and 44000. For most of the data,Expand
Progress in analysis and prediction of dynamic stall
Nomenclature c = chord CD =drag coefficient, D/qA CL =lift coefficient, L/qa CP = pressure coefficient, P-PW /q CM = pitching-moment coefficient, M/qA D =drag, Ib k = reduced frequency, wc/2U LExpand
An experimental study of the effect of pitch rate on the dynamic stall of a finite wing
  • Royal Aeronautical Society,
  • 1996
The 1976 Freeman Scholar Lecture: Some Current Research in Unsteady Fluid Dynamics