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Proceedings Paper

Wind on the Euro50 enclosure
Author(s): Holger Riewaldt; Martin Lastiwka; Nathan Quinlan; Kevin McNamara; Xin Wang; Torben Andersen; Andrew Shearer
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Paper Abstract

The Euro50 is a European Extremely Large Telescope. Its enclosure will be among the largest buildings of the world. Determining the maximum wind load is crucial for the survival of the structure, and local forces have an impact on the detailed design such as cladding. Pressure variations on the primary mirror and the wind load on the telescope are important for the development of active optics and segment control systems. To obtain data for the survival wind load as well as for typical observing conditions, the airflow pattern has been studied both with a wind tunnel model and computational fluid dynamics (CFD). Special attention has been given to determination of pressures on the primary mirror. Results are compared for the two methods and also with data available from previous studies and from measurements on existing telescopes. Finally, a typical wind load envelope is defined for the integrated telescope model.

Paper Details

Date Published: 29 September 2004
PDF: 12 pages
Proc. SPIE 5495, Astronomical Structures and Mechanisms Technology, (29 September 2004); doi: 10.1117/12.551278
Show Author Affiliations
Holger Riewaldt, Lund Observatory (Sweden)
National Univ. of Ireland/Galway (Ireland)
Martin Lastiwka, National Univ. of Ireland/Galway (Ireland)
Nathan Quinlan, National Univ. of Ireland/Galway (Ireland)
Kevin McNamara, National Univ. of Ireland/Galway (Ireland)
Xin Wang, National Univ. of Ireland/Galway (Ireland)
Torben Andersen, Lund Observatory (Sweden)
Andrew Shearer, National Univ. of Ireland/Galway (Ireland)

Published in SPIE Proceedings Vol. 5495:
Astronomical Structures and Mechanisms Technology
Joseph Antebi; Dietrich Lemke, Editor(s)

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