There are companies working on two blade design, which has other benefits. You can try to get rid of balance problem with mechanical design and software:
There are companies working on two blade design, which has other benefits. You can try to get rid of balance problem with mechanical design and software:
We had the Growian two blade designs and its successor the Monopteros single blade design in the 80s. They were pretty famous back then and looked spectacular because of their sheer size and the unexpected asymmetry. Unfortunately they are almost forgotten now.
There were a few 0.5MW NedWind 40/500 just out of Medemblik, decommisioned in 2016 though
Reminds me of Dyson, who makes zero-blade fans.
https://www.dyson.com/air-treatment/fans-heaters
These aren't zero-blade fans, they are normal multi-blade impellers that are piped into a duct.
Yes and this reminds me of Dyson fans vs the 15 $ fans video
https://www.youtube.com/watch?v=dS0oFmzU06g
Air purification would be a useful feature in windfarms, though.
It would be like trying to mop outside in a rainstorm. Reducing the creation of pollution is much easier than trying to catch it after the fact. Outside of indoor situations. Windfarms as they are today do far more for air pollution by just reducing coal and gas burning.
iirc, the submarine Красный Октябрь ("Red October") did pioneer a bladeless hydro fan propulsion system that scared NATO :)