## 10.18.2020

### The NatureHacker Vertical Axis wind turbine

This is sort of a combination of the H-Rotor and the Darrieus Vertical axis Wind Turbine ideas.  Also this uses all the understanding we have had in the past about wing and blade design.

I feel the picture above is self explanatory but let me try to explain design decisions.  As many of these blade systems can be used on the shaft as desired by the designer.  They can be inline with each other or staggered vertically on the shaft (which may resemble a sort of Savonius design).

Firstly the outer vertical wing is shaped in (at least) 2 dimensions.  Looking at the side view it is a teardrop shape.  This is because we don't need vertical lift in this direction, just getting some pressure buildup on the front of it and allowing the air to flow easily around leading to less risk of loosing the boundary layer along the back which would hurt us.  Also air moving the wrong direction (left to right in the picture) would do less work on the foil.  From the top view you can see the outer vertical wing is also shaped like a wing in this dimension as well.  This is to also increase drag a bit but the main purpose is to divert air "inwards" instead of flinging it off the sides of the propeller.  This also helps to keep air in the path of the next blade that comes around.

The inner horizontal wings connect the outer vertical wing to the rotor.  These wings, as seen in the picture, will be right side up on the top, omni-directional in the middle, and upside down on the bottom edge.  Again on the top and bottom edge we want to prevent loss of the boundary layer.  We want ripples or bumps (or preferably square pyramids) along the surfaces on the inside as this increases drag (with minimal disturbance to the flow) which we want.  Also notice that the angles will compress the air that enters the wing array the "correct" way but if the air is moving left to right instead it is more closed off (and thus aerodynamic) and expands the air which would lead to much less force being imparted in the wrong direction.

In conclusion a casual observer would think that the Savonius design is the best possible vertical rotor wind turbine.  This would be wrong because we have to realize that the maximum possible effect we can get is by disturbing the airflow as little as possible.  It is about efficiency, not just trying to "stop the wind" like the savonius does.  We want to receive energy from the wind while also keeping boundary layer/laminar flow intact because loosing the boundary layer acts against us.

This idea can also be combined with triboelectrics and use mediums like water or even plasma or aether instead of air.