Some airflow properties of telescope enclosures estimated from water-tunnel tests

Details Some airflow properties of telescope enclosures estimated from water-tunnel tests Some airflow properties of telescope enclosures estimated from water-tunnel tests

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pasp..103..597a&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 103, June 1991, p. 597-605.

Astronomy and Astrophysics

Astronomy

1

Enclosures, Telescopes, Ventilation, Water Tunnel Tests, Air Flow, Flow Distribution, Turbulent Boundary Layer

Scientific paper

A water-tunnel testing set-up has been developed and three different enclosure styles have been tested on 1:500 scale models under a variety of simulated ventilation conditions. It is found that, for all enclosure styles, there is an exterior component of flow, 'uplifted' over the top of the enclosure and divided from the original main flow direction at different levels depending on model characteristics. Since the location of the stagnation point is significantly affected by an external horizontal guiding vane, it is recommended that it should be above the turbulent boundary layer at the site. Enclosures with flat or near-flat roofs are found to be superior.

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