5MW Wind turbine Quasi-steady Output using FAST

Hello,

I found the research article ‘Impact of Higher Fidelity Models on Simulation of Active Aerodynamic Load Control For Fatigue Damage Reduction’ by Brian Resor et al. where a comparison between DU_SWAMP and FAST is conducted. You can find the original research article online : http://energy.sandia.gov/wp/wp-content/gallery/uploads/AIAA-2010-253-137-SAND10-0649C.pdf. I’m particularly interested in the model quasi-steady response to wind input in Figure 3. I have tried regenerated the results using FAST but I keep getting differences. Could you please have a look at my simulation setting?

I’m using wind input files without shear running for 200 minutes long simulations. I’m only using a limited number of DOF but even with all of them I didn’t find the same results. All the inputs and outputs are presented below. Thanks for your time.
The extracted variable names are :
LSShftFxa (thrust (k.N))
TipDxb1 (Flapwise tip dispalcement (m))
RotPwr (Mechanical power (k.W))
RootMyb1 (Flapwise root bending moment (k.N))

Input_Files_For_FAST.txt (27.4 KB)


Thanks for your help.
Regards,
terence.

Dear Terence,

It appears that you are modeling the NREL 5-MW turbine. I quickly compared your input file with mine, and the only major difference I saw is that your model neglects precone and shaft tilt. I didn’t find anything in the SANDIA report stating that precone and tilt were neglected, so, that may be a cause for the differences. You didn’t attach the AeroDyn input file, so, I can’t check your aerodynamic settings; perhaps there is a difference there as well.

The “FAST Digitised” results you posted are quite similar to the original FAST-generated results published in the NREL 5-MW specifications report, which are included in my Mar 26, 2014 post in the forum topic found here: http://forums.nrel.gov/t/nrel5mw-rotor-speed-data/867/1.

Best regards,