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Journal articles
By-pass transition to airfoil flutter by transient growth due to gust impulse
Abstract : We present an experimental study which shows that the mechanism known as transient growth of energy, can cause flutter instability of a nonlinearly flexible airfoil at a wind velocity below the linear critical flutter velocity. A flap mounted upstream a flexible airfoil in a wind tunnel generates a single gust which triggers the plunge and pitch oscillations. This gust is characterized using two-component hot-wire anemometry. For the first time experimental evidence is provided to confirm the theoretical scenario of a by-pass transition to flutter by transient growth. From an engineering point of view, transient growth might explain also the premature structural fatigue encountered in structures subject to wind. © 2009 Elsevier Ltd. All rights reserved.
https://hal-polytechnique.archives-ouvertes.fr/hal-01021128
Contributor : Denis Roura Connect in order to contact the contributor
Submitted on : Thursday, July 10, 2014 - 9:06:17 PM
Last modification on : Thursday, March 5, 2020 - 6:29:20 PM
Contributor : Denis Roura Connect in order to contact the contributor
Submitted on : Thursday, July 10, 2014 - 9:06:17 PM
Last modification on : Thursday, March 5, 2020 - 6:29:20 PM