Transient aero-thermal simulations for TMT

Konstantinos Vogiatzis

doi:10.1117/12.2056569

4 August 2014 Transient aero-thermal simulations for TMT

Konstantinos Vogiatzis

Author Affiliations +

Proceedings Volume 9150, Modeling, Systems Engineering, and Project Management for Astronomy VI; 91500P (2014) https://doi.org/10.1117/12.2056569
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

Abstract

Aero-thermal simulations are an integral part of the design process for the Thirty Meter Telescope (TMT). These simulations utilize Computational Solid-Fluid Dynamics (CSFD) to estimate wind jitter and blur, dome and mirror seeing, telescope pointing error due to thermal drift, and to predict thermal effects on performance of components such as the primary mirror segments. Design guidance obtained from these simulations is provided to the Telescope, Enclosure, Facilities and Adaptive Optics groups. Computational advances allow for model enhancements and inclusion of phenomena not previously resolved, such as transient effects on wind loading and thermal seeing due to vent operation while observing or long exposure effects, with potentially different flow patterns corresponding to the beginning and end of observation. Accurate knowledge of the Observatory aero-thermal environment will result in developing reliable look-up tables for effective open loop correction of key active optics system elements, and cost efficient operation of the Observatory.

Citation Download Citation

Konstantinos Vogiatzis "Transient aero-thermal simulations for TMT", Proc. SPIE 9150, Modeling, Systems Engineering, and Project Management for Astronomy VI, 91500P (4 August 2014); https://doi.org/10.1117/12.2056569

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