3 ms·
I curious as to whether the spiraling ramp helps direct the wind through the tunnels in some way, or if it is for some other purpose, such as to help remove con
by mannykannot 8y ago
I curious as to whether the spiraling ramp helps direct the wind through the tunnels in some way, or if it is for some other purpose, such as to help remove construction debris.
Somewhat tangentially, I recall reading, years ago, about an ingenious pre-columbian self-regulating aqueduct in northern Peru. It had an asymmetrical constriction where a vortex formed if the flow reached a certain speed, restricting the flow and causing a hydraulic jump that directed flood water into an overflow channel.
- i_feel_great 8y ago> I curious as to whether the spiraling ramp helps direct the wind through the tunnels in some way To me it looks like it channels wind coming from any direction down the spiral. At the bottom it presumably channels the air current to push the water in one direction.
- njharman 8y agofrom the side view here https://www.tandfonline.com/doi/full/10.1080/22797254.2018.1537684 https://www.tandfonline.com/doi/full/10.1080/22797254.2018.1... It's clear they follow the "funnel" shape. Optimized for laminar (air) flow. Not for hauling (which you'd want a fixed slope for.