Hi,

I am modelling a 2D rotating VAWT in Ansys Fluent.

I have carried out the analysis, but the answers that I am getting for Cm1, Cm2 and Cm3 (i.e. moments monitors for the 3 blades) are far from my expected results.

I am wondering if my reference values are incorrect, specifically in relation to the values that I have used for area, depth and length.

My three airfoils are placed 120 degrees apart. The chord length of each airfoil is 80mm, the diameter of the turbine is 1.1m, and I checked the surface integral, and each airfoil blade is 0.1799m^2 (Total=0/5397m^2).

Can anyone advise what my reference values should be in this case?

I thought it was:

Area= 0.08m (chord length * Depth)

Length = 0.08m (chord legth), and 

Depth = 1m (as it's 2D)

I tried the Fluent material, but I can't find the answer to my question.

Thank you in advance.

Aidan