[Pepita]

Dear all,

I'm working on modelling wind turbines with CFX. I've already got satisfactory results on a bare wind turbine (validated with experimental data). However, I can not get good results for the ducted wind turbine. I used MFR for the unducted turbine, so I did for the ducted wind turbine. But I'm not sure if this will be the right settings for the shrouded WT)...I used exactly the same BC exept for the duct (before it was not there) so I gave couter wall velocity to the duct (the blade sees it rotating to the opposite direction of omega.) It's a steady state simulation, the residuals are set to 10^-5 and #iteration to 1000, the convergence is obtained in some of the TSR (i run different simulations with different omega) but not in all. But the results for ducted wind turbine are terrible!!!

Any help is much appreciated and many thanks for taking the time to read the post.


Cheers,

pepi