Aeroelasticity
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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
NASA testing a scale model Lockheed Electra in a wind tunnel for flutter
Buffeting of the fin caused by the breakdown of the vortex on the NASA HARV F/A-18 wing
Mass balances protruding from an aileron used to suppress flutter
Helical strake
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A helical strake, also known as a Scruton strake, is a helix-shaped fin arranged along a structure to disrupt fluid flow. It serves to mitigate fatigue by disrupting the vortexes forming a Kármán vort
Aeroelasticity
…Blunt shapes, such as chimneys, can give off a continuous stream of vortices known as a Kármán vortex street, which can induce structural oscillations. Strakes are typically wrapped around chimneys to stop the formation of these vortices. In complex structures where both the aerodynamics and the mechanical…
A two-start helical strake on a chimney