The advantages of having contra-rotating turbine blades over just single direction rotating blades, is an increased stability on the vertical 'spinning top' axis. Also, contrarotating blades effectively cancel out torque precession and instabilities associated with only one-directional rotating blades. Contra-rotating blades have been found to be between 6% and 16% more efficient than just single rotating blades. More overall 'flywheel' kinetic energy storage and rpm's to generator.
Explain how and why you created this work. Was it for a specific brief, etc.?
I had studied a specific US patent 9022721B2 Vertical Axis Wind Turbine, and realized how it could be improved upon. So I have endeavored to do so. The science discovery with the orientation and configuration of the airfoil blades remain the same, though I have made the original straight blades now helical, which have many inherent advantages. I have also added the contra-rotation feature, and have eliminated the two top and bottom wind-obstructing discs.
What were you trying to express?
My desire is to mimic flowform patterns seen in Nature, and to create a very functionally-efficient and aesthetically-pleasing wind turbine generator. For added subtle beauty, the silhouette of this wind turbine has the proportions of the 'Golden Rectangle' i.e. 1:1.62
Is it 100% your original work?
I have gleaned 'unique 'configuration and orientation' of the airfoil blades from US9022721B2 'Vertical Axis Wind Turbine'. Their business website: www.vortexis.com
My improvements to this patent are vastly different. I have successfully applied for a US provisional patent on February 29, 2016