Dear Jose Gregorio Elorreaga Ramos,

Actually, the turbine rotor with straight blade is called straight-bladed Darrieus-type VAWT, or straight-bladed VAWT simply. The Darrieus VAWT is basically a lift-type wind turbine. The rotor consists of two or more airfoil-shaped blades which are attached to a rotating vertical shaft.

This link will help you for more information in designing point of view.

https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.mdpi.com/1996-1073/5/9/3425/pdf&ved=2ahUKEwjjsrvi9MPoAhUJxoUKHdRNCqMQFjAOegQIBBAC&usg=AOvVaw0NYEVC2SpS-ubTC5YXg9ag

Hope you understand my answer, if any question please feel free to ask me.

Thanks.

Usually, the operational scenario is the most important factor in selecting the wind turbine. So have a deep study about the location data for which you want to design your WT.

vertical

Dear Jose,

Normally, it is difficult (for not to say impossible) to find information on the details of the blades of large commercial turbines, since that information is confidential because it is a big business, as I'm sure you can imagine. I have been able to find details on proposed blade designs for open-access technologies, though. Here you can find some information:

Hugh Piggot 2000 Wind-power workshop:

https://archive.org/stream/fe_wind_power_workshop-hugh_piggot/wind_power_workshop-hugh_piggot_djvu.txt

Other articles about blade design that I think I cannot upload here but can refer you to them:

Moore TMC-661P Fan design

Moore TMC-671P Resonances of pivoted blades

Barnes 2015 Improved methodology for design of low wind speed specific wind turbine blades

Karthikeyan 2015 Review of aerodynamic developments on small HAWT blade

Then, for optimizing the blade designs and/or obtaining blade airfoil data, you could use QBlade. QBlade is open source software for design and simulation of horizontal and vertical axis wind turbines (HAWT and VAWT), distributed under the GNU General Public License. What is most interesting to you is that its integration in XFOIL allows airfoil design and airfoil performance analysis, and even allows also for extrapolation of airfoil performance data to 360° angle of attack, etc. That is, QBlade, using panel methods, allows obtaining for any given airfoil the lift and drag coefficients for different angles of attack and values of Re. You can download QBlade and manuals here: http://qblade.npage.de/

You can create many types of rotors and turbines and try to optimize their lift coefficient by changing the twist and/or chord length and/or airfoil type along the blade span.

If the specific airfoils that you want to use are not available in the airfoil library/database of QBlade, in the following UIUC's link you can find the airfoil coordinates to import to QBlade: http://m-selig.ae.illinois.edu/ads.html

Hope this is useful,

Jose

P.S.: for choosing appropriate blade designs for improved efficiency of horizontal axis wind turbines (HAWT), I think the following question in ResearchGate could be very useful for you:

https://www.researchgate.net/post/Is_any_detail_information_on_Wind_turbine_blade_model_available#55ec59a5614325a0b18b457f

Then, for optimizing the blade designs and/or obtaining blade airfoil data, please, go to this other question in ResearchGate:

https://www.researchgate.net/post/how_can_we_increase_lift_coefficient_of_wind_turbines_to_increase_utilization_of_very_slow_wind_for_electricity_generation

Wind energy is used to generate environmentally friendly electrical energy with high moment forces through the wind turbine rotation. Although electric power generation is good, wind turbine noise affects the environment by creating different sound pressure levels.

1- https://www.tandfonline.com/doi/abs/10.1080/01430750.2020.1720806?journalCode=taen20

2- https://www.simscale.com/blog/2019/09/wind-turbine-blade-design/

3- http://www.ijrar.org/papers/IJRAR19J1380.pdf