RANS Turbulence Models For Pitching Airfoil
Author(s)
K. A. Ahmad, W. McEwan, J. K Watterson & J. Cole
Abstract
The RANS code Fluent 6TM is used to predict the flow field around a pitching
NACA 0012 airfoil. Experimental data for this unsteady flow field is widely available
for validation. A hybrid mesh was employed in the computational domain and
different mesh configurations were tested and the results were compared. Several
turbulence models such as k- and k-ω were tested and the results were also compared.
The turbulence model that gives the best agreement with the experimental
data is SST k-ω with y+ value set to 1. Mesh and time step dependence studies
were also performed and it was found that the results were not affected by varying
these parameters.
Nomenclature
cl Drag coefficient
cd Lift coefficient
cm Pitching moment coefficient
k Turbulence kinetic energy
F+ Reduced frequency
L Length of the object
w Natural frequency
y+ Local Reynolds number
α Angle of vibration
αmax Maximum angle of pitch
αmin Minimum angle of pitch
dα Range of the angle of pitch
Dissipation rate of turbulence
ω Specific turbulent dissipation rate
Keywords
Related Book
Other papers in this volume
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