Hi All,
Here is a half baked idea combining an air lift pump and a stationary vortex for possibly turning a low rpm wind generator.
Air lift pumps
Air lift lung test
https://www.youtube.com/watch?v=riiaaWnfzSg
20 watt air lift
http://www.youtube.com/watch?v=KSb81nHCpI8
260 watts some nice flow
http://www.youtube.com/watch?v=cOYRNPPwayg
Vortex generators
10kw gravitation vortex plant
http://www.youtube.com/watch?v=oo_mP18IXMo
Another one
http://www.youtube.com/watch?v=F_3xYjZhKjA
Vortex with turbine
http://www.youtube.com/watch?v=IYoco8GjASI
Interesting concept. Here is another video with some measurements regarding the flow and power consumed.
http://youtu.be/DkPUQlt0iSw