I’ve been meaning to release more of my teaching material under copyleft style licenses for some time and have recently made the first release! The first bit to be released is a short wind turbine design guide which tells you how to calculate the flows around a wind turbine using some very simple theory. This is enough to get you a very simple blade design and there is an example calculation in a spreadsheet. The documents can be found on my University web pages.
I also have some Octave/MATLAB code for doing the calculation which since I think spreadsheets are evil. This shows the core of the basic method – but doesn’t go very much further.
Some answers to frequently asked questions:
Q: How do you get CL and CD data?
A: There are a variety of sources of data such as Abbot and Von Doenhoff’s book or the
Q: How do you pick the chord of the aerofoil?
A: There is an equation suggested in the document but this is one of those design problems where a bit a trial and error and help.
Q: Why is you Cl = 0.0844 i, the actual Cl curve is non-linear?
A: This is just a crude approximation to show how the method works, to do the job properly you need to add in some code to interpolate the real data.