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Help Showing Wake Losses #858

Answered by misi9170
Nellytado asked this question in Q&A
Apr 1, 2024 · 2 comments · 8 replies
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Hi @Nellytado , how are you defining "fewer wakes"? If you mean that the normalized wake deficit (e.g., the velocity reduction in the wake divided by the free stream velocity) is smaller at 14m/s than at 8m/s, and even smaller at 17m/s, that is expected---at 14m/s and 17m/s, the NREL 5MW (along with most other wind turbines) are above their rated wind speed, so they are pitching their blades and reducing the thrust force on the flow, leading to shallower wakes.

Here is a plot of the thrust coefficients for each of the wind turbines provided in FLORIS. As you can see, the thrust coefficient (Ct) is much lower at 14m/s and 17m/s than at 8m/s.

Is it possible that the reduction in thrust coe…

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