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

Alonso Rodrigo, Gustavo; Meseguer Ruiz, José; Sanz Andres, Angel Pedro y 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.

Descripción

Título: On the galloping instability of two-dimensional bodies having elliptical cross sections.
Autor/es:
  • Alonso Rodrigo, Gustavo
  • Meseguer Ruiz, José
  • Sanz Andres, Angel Pedro
  • Valero Sánchez, Eusebio
Tipo de Documento: Artículo
Título de Revista/Publicación: Journal of Wind Engineering and Industrial Aerodynamics.
Fecha: Agosto 2010
Volumen: 98
Materias:
Palabras Clave Informales: Galloping; Elliptical cross-section bodies; Wind tunnel
Escuela: E.T.S.I. Aeronáuticos (UPM) [antigua denominación]
Departamento: Infraestructura, Sistemas Aeroespaciales y Aeropuertos [hasta 2014]
Grupo Investigación UPM: LPF-TAGRALIA
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

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.

Más información

ID de Registro: 9597
Identificador DC: http://oa.upm.es/9597/
Identificador OAI: oai:oa.upm.es:9597
Identificador DOI: 10.1016/j.jweia.2010.02.002
URL Oficial: http://www.sciencedirect.com/science/journal/01676105
Depositado por: Memoria Investigacion
Depositado el: 10 Nov 2011 08:51
Ultima Modificación: 20 Abr 2016 17:57
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