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i reversed the twist angles from root to tip instead from tip to root and it looks like this But it still different from the original one and i don't have another reference to compare with

As you can see in the figure below there is a point point where the lift and drag act and the angle is measured ( specially twist angle) it is mentioned before - in the book 'wind energy explained' - that the point is c/4 Taking in consideration that it is only one section and we must have N...

Hello everyone, Now i am trying to model wind turbine blade using solidworks. I have the airfoil coordinates at each section of the blade, but the coordinates are distance per chord (x/c,y/c) so i have to scale it using the calculated chord. When i scale it with respect to the origin - which is...

Unfortunately, there is no solved example for this course

KENAT i agree with you, incompressible flow is a safe assumption when we are dealing with HAWT since the speed and hence the Mach number are small. rb1957 This method used - as i understand - to calculate the induced drag, and since the induced is caused by the downwash which lead to change the...

All my respect to the rules but i am not searching for someone to solve my home work - that if i have one - all i need is a text book or a paper where i can find more detailed discussion about the subject rather than just a part of a presentation which is a little bit obscure for me. I asked...

Thanks for the link but i was hoping for some kind case study or at least solved examples

Hello every one I would like to learn more about trefftz plane theory which is used to calculate induced drag. Is it an effective method to calculate induced drag? can i used it with propeller and wind turbine instead of an aircraft wing? thanks in advance