[Seervan]

Hi all

I am modelling a wind turbine rotor with an RPM of 72 and diameter of 10m. The inlet velocity is 5 m/s. I am using MRF in steady state. While I extract the torque my results agree with the experiments of the literature. However, when I extract the pressure coefficient I get values of -3000~2000! It is pretty odd to me and I need the pressure coefficients. I have played with mesh, change my physics from incompressible to compressible cte density and yet the problem exists. Do you have any suggestions? What part can me wrong? I am using k-w sst and tried both polyhedral and trimmer meshers.

Thanks in advance

[me3840]

Are you sure the Cp reference values are set correctly?

[Seervan]

Originally Posted by me3840

Are you sure the Cp reference values are set correctly?

I am using the default "Pressure Coefficient" field function. I don't know about its reference values. Maybe I should define a field function based on two extracted static and stagnation pressure points?

[me3840]

Originally Posted by Seervan

I am using the default "Pressure Coefficient" field function. I don't know about its reference values.

The computer can't set the reference values for you, there is no such thing as a default pressure coefficient. You need to go to tools>field functions>pressure coefficient and set the reference values.