Determination of Profile Coefficients of aerofoil
 

Hello everyone

I have to determine the aerodynamic profile coefficients of our new rotor blade for obtaining the data for aeroelastic simulation. I tried with the online 2D BEM programs like
Q blade,
X foil
java foil etc,

but the results are quite different from a few set of data i have for the aerofoil at the moment. Do u know which is the best method (not a wind tunnel test) or software for determining the coefficients like Cd Cl and Cm.

Thanks in advance