Langley Research Center Turbulence Modeling Resource

 

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2D NACA 0012 Airfoil Validation Case

EASMko2003-S Model Results
 

Link to EASMko2003-S equations

Note that thorough grid studies were not performed for validation cases such as this one. Some effort was made to ensure reasonable grid resolutions, but there may still be small noticeable discretization errors. Therefore, these validation results shown should be considered representative, but not "truth." (See the NACA 0012 Numerical Analysis Case for a representative verification exercise of this airfoil case.)

Above EASMko2003-S results are from CFL3D on the 897x257 grid. CFL3D used freestream turbulence intensity=0.052% and freestream turbulent viscosity (relative to laminar)=0.009 (additional details can be found in the CFL3D User's Manual, Appendix H). Please read note 5 on Notes on running CFD page. Note that these are compressible code results at "essentially incompressible" conditions of M=0.15. There may be a very small influence of compressibility.

Note that this model is currently assigned MRR Level 1 for the purposes of this website. This is because at this time the TMBWG has results for this model from only one code. The results on this page are therefore not necessarily reliable until additional independent code(s) can be used to verify the model implementation.

Behavior of model near CLmax:

The behavior of the EASMko2003-S model near maximum lift for this 2-D case is shown in the following plots (CFL3D only). The cases were run every 1 deg (starting at 15 deg.), at least until C_L,max was approximately attained. Note that the highest angle of attack run (alpha=19) did not converge well in this case. An approximate C_L,max range from experiments (McCroskey, AGARD CP-429, July 1988; also NASA TM 100019, October 1987) is highlighted in the first plot by green dashed lines. Note, however, that experimental data near maximum lift no doubt contains a significant degree of three-dimensionality. Also, these CFD results are still on the 897x257 grid, and there is likely to be significantly more grid sensitivity for the higher angles of attack than for the lower angles of attack shown above. Therefore, the results below should only be viewed qualitatively.

 
 

Jump to: SA Results,  SA-RC Results,  SSTm Results,  SST-Vm Results,  SSG/LRR-RSM-w2012 Results,  Wilcox2006-klim-m Results,  K-kL-MEAH2015m Results,  K-e-Rt Results

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Last Updated: 03/24/2021