The term controlled aerodynamic instability phenomena was first used by Cristiano Augusto Trein in the ''Nineteenth KKCNN Symposium on Civil Engineering'' held in Kyoto – Japan in 2006. The concept is based on the idea that
aerodynamic
Aerodynamics, from grc, ἀήρ ''aero'' (air) + grc, δυναμική (dynamics), is the study of the motion of air, particularly when affected by a solid object, such as an airplane wing. It involves topics covered in the field of fluid dyn ...
instability phenomena, such as
Kármán vortex street
In fluid dynamics, a Kármán vortex street (or a von Kármán vortex street) is a repeating pattern of swirling vortices, caused by a process known as vortex shedding, which is responsible for the unsteady separation of flow of a fluid around ...
,
flutter
Flutter may refer to:
Technology
* Aeroelastic flutter, a rapid self-feeding motion, potentially destructive, that is excited by aerodynamic forces in aircraft and bridges
* Flutter (American company), a gesture recognition technology company acqu ...
, galloping and
buffeting
Aeroelasticity is the branch of physics and engineering studying the interactions between the inertial, elastic, and aerodynamic forces occurring while an elastic body is exposed to a fluid flow. The study of aeroelasticity may be broadly clas ...
, can be driven into a controlled motion and be used to extract energy from the flow, becoming an alternative approach for
wind power
Wind power or wind energy is mostly the use of wind turbines to generate electricity. Wind power is a popular, sustainable, renewable energy source that has a much smaller impact on the environment than burning fossil fuels. Historicall ...
generation systems.
Justification
Nowadays, when a discussion is established around the theme wind power generation, what is promptly addressed is the image of a big
wind turbine
A wind turbine is a device that converts the kinetic energy of wind into electrical energy. Hundreds of thousands of large turbines, in installations known as wind farms, now generate over 650 gigawatts of power, with 60 GW added each year. W ...
getting turned by the wind. H