And then you can look
here.
Somone who posts here has done what you're trying to do already and produces some very pretty pictures to boot, I'll have a search and try to find some of their results.
Here is some more help. Just do an advanced search on 'Blade Element Momentum Theory' and you'll get more, including the names of the usual suspects when it comes to this stuff (Dave Jackson, Matthew Parsons, Graviman)
Aha ! Delta3 is the name I was looking for with the pretty pictures see
here.