I was tempted to keep out of this, but I have to agree with Samoapower.
Unless you have a large wind tunnel or have a decent anemometer with data aquisition system and a means of taking 1 min or 10 min averages of power over a long period and sorting the results into bins, you might as well not bother.
The only thing that you could do is to try direct comparisons between blades with identical alternators as loads, in close proximity at the same time.
From the pictures it looks as though your chord gives you a tsr of about 3. I have no idea of what it is form the angles as I don't know what they are.
The prony brake is fine in a wind tunnel, but no use in real life wind. You need a lot of skill and knowledge to make any sense from a simple fan. At least try to make some form of wind tunnel out of it before wasting effort.
Your trailing edge looks to be thick but that may be a photographic problem.
There is little that most people can do about blade design and testing with the facilities available. Some useful work has been done on blade profiles for wind power, mostly for large machines and not relevant to small ones. Some design has been done on profiles for small blades and if you can get hold of those profiles and use them as intended they should be fine. Use them not as intended and all the benefit goes out of the window.
Many promising sections that have worked well for aircraft fail to show benefit for wind power.
Unless you are quite skilled in this field or have exceptional facilities you will not do any better than the type of blades that DanB or Hugh Piggott use unless you are extremely lucky and the result could be much worse.
Your ideas on alternator design are odd but are easily verified. By all means keep posting your blade ideas, but I would advise others to ignore it until we have genuine proof of results.
I try not to be negative in my comments but there are times when it seems to be necessary to prevent others with limited experience thinking that they are reading something useful.
Flux