Transversal instability of a single sphere in a swing configuration

Gomez-Ortega, Omar and Ogueta Gutierrez, Mikel and Manzanares Bercial, Raul and Lopez Nuñez, Maria Elena and Franchini Longhi, Sebastian Nicolas and Sanz Andres, Angel Pedro (2019). Transversal instability of a single sphere in a swing configuration. In: "15th International Conference on Wind Engineering (ICWE15)", 1-6 sep, Beijing. pp. 1-2.

Description

Title: Transversal instability of a single sphere in a swing configuration
Author/s:
  • Gomez-Ortega, Omar
  • Ogueta Gutierrez, Mikel
  • Manzanares Bercial, Raul
  • Lopez Nuñez, Maria Elena
  • Franchini Longhi, Sebastian Nicolas
  • Sanz Andres, Angel Pedro
Item Type: Presentation at Congress or Conference (Article)
Event Title: 15th International Conference on Wind Engineering (ICWE15)
Event Dates: 1-6 sep
Event Location: Beijing
Title of Book: International Conference on Wind Engineering (ICWE15)
Date: 2019
Subjects:
Freetext Keywords: Transversal instabilities, Sphere aerodynamics, Autorotation, Barrier discharge plasma actuator
Faculty: E.T.S. de Ingeniería Aeronáutica y del Espacio (UPM)
Department: Aeronaves y Vehículos Espaciales
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The existence of transverse instability in spherical beacons fixed to the guard line of high voltage transmission lines under a longitudinal wind has been recently reported. Several kinds of motion appear at a wide range of wind speeds, at low wind speed the vortex induced vibration is suggested as a possible responsible for the swinging motion but not for the autorotation motion. In this paper, dynamic tests over a single sphere in a swing configuration and static tests over a single sphere, that have been carried out in order to find the causes that originate autorotation of the spherical beacons, are reported. The identification of the motion types has been performed in dynamic tests, meanwhile static tests give information about the loads over the sphere. In addition, a possible solution to this behaviour based on the control of the sphere boundary layer through dielectric barrier discharge plasma actuator is proposed.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainENE2016-80107-RUnspecifiedUnspecifiedActuadores aerodinámicos activos para el control de cargas

More information

Item ID: 67218
DC Identifier: https://oa.upm.es/67218/
OAI Identifier: oai:oa.upm.es:67218
Deposited by: Memoria Investigacion
Deposited on: 16 Nov 2021 09:22
Last Modified: 16 Nov 2021 09:22
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