I was on looking at these generators further yesterday and just by looking at them it appears they are heavily based on jet engines. They appear to have all the requirements I discussed earlier. A gradual convergent zone before and directly after the blades. Immediately after the aft convergent zone (behind the blades) there is a large divergent zone (where the two different diameter shrouds are). This will create the high pressure area which will prevent backflow, which will slow the blades down. The only thing I can ascertain from the illustrations that can be improved is the shape of the blades. I had seen some photos of a new generation of compressor blades which result in higher efficiency numbers for jet engines. I am not sure if these blades will work the same way in this instance, but it couldn't hurt. The only problem is I can't remember where I saw them. I have been trying to find it again, if I do, I will post them up for all to see.
J
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