Characterisation of cross-flow above a railway bridge equipped with solid windbreaks

Avila Sanchez, Sergio; Lopez Garcia, Oscar; Cuerva Tejero, Alvaro y Meseguer Ruiz, J. (2016). Characterisation of cross-flow above a railway bridge equipped with solid windbreaks. "Engineering Structures", v. 126 ; pp. 133-146. ISSN 0141-0296. https://doi.org/10.1016/j.engstruct.2016.07.035.

Descripción

Título: Characterisation of cross-flow above a railway bridge equipped with solid windbreaks
Autor/es:
  • Avila Sanchez, Sergio
  • Lopez Garcia, Oscar
  • Cuerva Tejero, Alvaro
  • Meseguer Ruiz, J.
Tipo de Documento: Artículo
Título de Revista/Publicación: Engineering Structures
Fecha: 2016
Volumen: 126
Materias:
Palabras Clave Informales: Wind tunnel; PIV analysis; Railway bridge; Windbreaks; Turbulence; Flow
Escuela: E.T.S. de Ingeniería Aeronáutica y del Espacio (UPM)
Departamento: Aeronaves y Vehículos Espaciales
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

The flow field above a two dimensional model of a railway bridge equipped with solid windbreaks is analysed in a wind tunnel. Particle image velocimetry (PIV) is used to measure the flow velocity in planes perpendicular to the bridge span. The mean velocity components, the two-component turbulent kinetic energy, the turbulence intensities of the velocity fluctuation components and the Reynolds shear stress above the bridge deck are presented. The flow patterns based on the streamlines of the average flow field are analysed. The inclusion of a windbreak produces a separation bubble, that is locked to the bridge deck due to presence of the leeward fence. Special attention is paid to the analysis of the flow field characteristics along the vertical profiles above the railway tracks. The inclusion of the windbreak leads both to an increase of the mean velocity and the turbulence intensity around the catenary contact wires. On the other hand, the flow in the region close to the bridge deck is slowed-down. The effect of the size of the final interrogation window used in the PIV analysis is considered, more particularly on the determination of the mean velocity and turbulence intensity. The results show that a decrease of the final interrogation window leads to an increase of the turbulence intensity when there are no wind protection devices installed on the bridge.

Proyectos asociados

TipoCódigoAcrónimoResponsableTítulo
Gobierno de EspañaTRA2009-13912-C012-01Sin especificarSin especificarSin especificar

Más información

ID de Registro: 48084
Identificador DC: http://oa.upm.es/48084/
Identificador OAI: oai:oa.upm.es:48084
Identificador DOI: 10.1016/j.engstruct.2016.07.035
URL Oficial: https://www.sciencedirect.com/science/article/pii/S0141029616303704
Depositado por: Memoria Investigacion
Depositado el: 02 Feb 2018 11:42
Ultima Modificación: 02 Feb 2018 11:42
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