So I have a design for a wind turbine to use in my garden. It is a fairly average darrieus wind turbine design. The wind speed in my garden maxes at about 30mph and constantly changes direction.
My problem is that I have no clue how to model my wind turbine and get any sort of rough calculation for a power output. I have found a generator on eBay which I can only assume to be suitable although I have no clue how to calculate what RPM would be needed to produce 30w as the generator claims. The description says 900RPM but that seems a lot to me. Nonetheless, I don't have any experience and this is only intended as a pre-university project so it doesn't have to be incredible.
If anyone has any insight as to a good place to look for information on VAWT modelling then I would be very grateful. Any help is appreciated though.