Computer Science – Performance
Scientific paper
Jan 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ijimw...6...25b&link_type=abstract
International Journal of Infrared and Millimeter Waves (ISSN 0195-9271), vol. 6, Jan. 1985, p. 25-40.
Computer Science
Performance
1
Infrared Telescopes, Millimeter Waves, Radio Telescopes, Thermal Simulation, Aluminum Coatings, Convective Heat Transfer, Deformation, Free Convection, Simulation, Thermal Expansion, Zinc Coatings
Scientific paper
The thermal model simulations presently used to identify the critical elements in the thermal design of a mm-wave telescope and its enclosure indicate that an enclosure with a high IR emissivity reflective paint-coated outer surface, and an interior zinc coating with low IR emissivity, works as a highly effective radiation shield. A sprayed aluminum coating on the telescope makes free convection the dominant heat transfer mechanism. An enclosure with louvers would work as a chimney, forcing inside air temperature to follow ambient temperature to within a few degrees. Knowing the structural analysis coefficients for differential thermal expansion, it is possible to decide which time constants in backing structure and subframe have to be matched in order to achieve optimal performance.
Bregman Jesse D.
Casse J. L.
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