I simulated an onshore wind turbine with steady wind (14 m/s), the rotor has no initial RotSpeed, and WakeMode =1 in Aerodyn15. I found this warning message:
The BEM solution is being turned off due to low TSR. (TSR = 0)
I guess the reason is that my rotor starts to rotate from 0 rpm, so tip speed ratio (TSR) = 0. Thus the initial condition in my model is more like a parking condition.
And wake model is for working condition (i.e. rotating rotor), thus it seems reasonable that BEM is automatically turned off by the code.
Howerver, as I set WakeMode =1, and my rotor will rotate after enough time, I want to know when BEM will be truned on? TSR larger than some value?
Is there a maximum value of TSR beyond which BEM is not accurate/suitable any more?
Is there a range of TSR within which wind turbine can work normally?
As I simulated the case without any control, I find that TSR can reach 16. So I doubt whether the rotor aerodynamic force is reasonable.