Hi Jinane Radi

The below link will help you understand how to determine the radius and create the cylinder segment for wind turbine blade.

https://energy.sandia.gov/programs/renewable-energy/wind-power/rotor-innovation/rotor-design/numerical-manufacturing-and-design-tool-numad/

Additionally, you can also develop the CAD model for the entire blade by giving input airfoil properties at each blade segment.

Regards

Are you designing the blade, or is it an existing blade?

And, do you want only the external geometry of the blade (e.g. for CFD), or also the structural properties (e.g. for FEM structural analysis)?

Best regards :)

Hello Mr.@Ricardo Fernández ,

I'm designing the blade using Solidworks , and right now I'm just using it for CFD work.

best regards

Hi Jinane Radi

I guess the blade radius at the root comes from a compromise between its loading capacity, the hub size, the pitch mechanism, and the overall costs of the three components (blade, hub, and pitch mechanism).

If you are not analyzing these things, I suggest looking at existing blades and basing your decision on that.

For structural reasons, there should also be a smooth transition from the circular root section to the airfoil-shaped sections. But in your case, if you are only interested in CFD analyses, the inboard blade sections typically contribute little to the overall forces and moments, so I wouldn't be too worried about the inboard shape :) In fact, if you are not including the hub in your simulations, the flow over the inboard sections will probably be unrealistic due to the root vortex...

Hope this helps.

BR,

Ricardo

thank you Ricardo for you answer

it was helpful

best regards