aerodynamic instability

aerodynamic instability

[‚e·ro·dī′nam·ik ‚in·stə′bil·əd·ē]
(aerospace engineering)
An unstable state caused by oscillations of a structure that are generated by spontaneous and more or less periodic fluctuations in the flow, particularly in the wake of the structure.
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References in periodicals archive ?
Theodorsen, "General theory of aerodynamic instability and the mechanism of flutter," NACA Technical Report 469, 1934.
Experimental Investigation on Flutter Similitude of Thin-Flat Plates
The attached flow around the streamlined body causes extreme aerodynamic instability [1].
Modeling of transient aerodynamic forces based on crosswind test
Theodorsen, "General theory of aerodynamic instability and the mechanism of flutter," NACA Report 496, National Advisory Committee for Aeronautics-NACA, 1935.
Control of limit cycle oscillation in a three degrees of freedom airfoil section using fuzzy Takagi-Sugeno modeling
The resulting change in the cable's profile can affect the way it reacts to wind, creating an aerodynamic instability that sets the cable vibrating at some resonant frequency, somewhat like a guitar string.
Bad vibrations: the ancient craft of bridge design still holds surprises

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