The New Theory of Flight identifies rotational separation at the trailing edge as the physical mechanism allowing a wing to generate large lift at the price of small drag. Rotational separation is illustrated above left in the case of flow of air past a circular cylinder.
The swirling flow is similar to the swirling flow of a tornado generated by rising hot air sucking air
towards a low pressure center in a spiraling motion, illustrated above right.
NBCNEWS reports today on Man-made tornadoes could power the future:
- Coiled up in a tornado is as much energy as an entire power plant. So a Canadian engineer has a plan to spin up his own twister and extract energy from its tethered tail.
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