Naca 0012 Cd Test
Hello people!
I want to test the profile NACA 0012 for differents alfa and compare the results with experimental and XFoil graphics. It should be simple, but my results are not satisfactory: ro= 1,225 Kg/m^3 Mu_air=1,75*10^5 Kg/(m*s) D=1 with these Data, i obtain the differents velocities (in m/s): Re=200K -> vs= 2,8 Re=500k -> vs= 7,102 Re=3M -> vs=42,612 Re=6M -> vs=85,224 For alpha= 0°and different viscosity theories: RE=6M Spall. Alm. K-E Stndrd K-w SST Trans.flow X-Foil(=Exper.) cd 3.31*10^(-2) 6.2*10^(-2) 3.32*10^(-2) 5.08*10^(-3) RE=1M K-E Stndrd K-w SST Trans.flow X-Foil(=Exper.) cd 2.1*10^(-3) 1.73*10^(-3) 5.4*10^(-3) RE=200k Spall. Alm. K-E RNG K-w SST Trs.flow X-Foil(=Exper.) cd 6.4*10^(-5) 1.5*10^(-4) 3.14*10^(-4) 1.02*10^(-2) For Low-Re I thought that K-omega sst could be better than K-Epsylon, but I don't see a good result...anywhere :( (the mesh is good, from the profes.) Thank you for your help! Ferran |
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