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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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References in periodicals archive ?
Theodorsen, "General theory of aerodynamic instability and the mechanism of flutter," NACA Technical Report 469, 1934.
Theodorsen, "General theory of aerodynamic instability and the mechanism of flutter," NACA Report 496, National Advisory Committee for Aeronautics-NACA, 1935.
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.

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