On the galloping instability of two-dimensional bodies having elliptical cross sections.

Alonso Rodrigo, Gustavo and Meseguer Ruiz, José and Sanz Andres, Angel Pedro and Valero Sánchez, Eusebio (2010). On the galloping instability of two-dimensional bodies having elliptical cross sections.. "Journal of Wind Engineering and Industrial Aerodynamics.", v. 98 (n. 8-9); pp. 438-448. ISSN 0167-6105. https://doi.org/10.1016/j.jweia.2010.02.002.

Description

Title: On the galloping instability of two-dimensional bodies having elliptical cross sections.
Author/s:
  • Alonso Rodrigo, Gustavo
  • Meseguer Ruiz, José
  • Sanz Andres, Angel Pedro
  • Valero Sánchez, Eusebio
Item Type: Article
Título de Revista/Publicación: Journal of Wind Engineering and Industrial Aerodynamics.
Date: August 2010
ISSN: 0167-6105
Volume: 98
Subjects:
Freetext Keywords: Galloping; Elliptical cross-section bodies; Wind tunnel
Faculty: E.T.S.I. Aeronáuticos (UPM)
Department: Infraestructura, Sistemas Aeroespaciales y Aeropuertos [hasta 2014]
UPM's Research Group: LPF-TAGRALIA
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Galloping, also known as Den Hartog instability, is the large amplitude, low frequency oscillation of a structure in the direction transverse to the mean wind direction. It normally appears in the case of bodies with small stiffness and structural damping, when they are placed in a flow provided the incident velocity is high enough. Galloping depends on the slope of the lift coefficient versus angle of attack curve, which must be negative. Generally speaking this implies that the body is stalled after boundary layer separation, which, as it is known in non-wedged bodies, is a Reynolds number dependent phenomenon. Wind tunnel experiments have been conducted aiming at establishing the characteristics of the galloping motion of elliptical cross-section bodies when subjected to a uniform flow, the angles of attack ranging from 0° to 90°. The results have been summarized in stability maps, both in the angle of attack versus relative thickness and in the angle of attack versus Reynolds number planes, where galloping instability regions are identified.

More information

Item ID: 9597
DC Identifier: http://oa.upm.es/9597/
OAI Identifier: oai:oa.upm.es:9597
DOI: 10.1016/j.jweia.2010.02.002
Official URL: http://www.sciencedirect.com/science/journal/01676105
Deposited by: Memoria Investigacion
Deposited on: 10 Nov 2011 08:51
Last Modified: 20 Apr 2016 17:57
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