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Related Experiment Videos

Wind loads on ground-based telescopes.

Douglas G MacMynowski1, Konstantinos Vogiatzis, George Z Angeli

  • 1California Institute of Technology, Pasadena, California 91125, USA. macmardg@cds.caltech.edu

Applied Optics
|October 28, 2006
PubMed
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Unsteady wind inside large optical telescopes causes vibrations, degrading image quality. This study models these dynamic wind loads using observatory data, wind-tunnel tests, and CFD analyses for better telescope design.

Area of Science:

  • Astronomy and Astrophysics
  • Mechanical Engineering
  • Fluid Dynamics

Background:

  • Telescope performance is affected by structural vibrations from unsteady wind within enclosures.
  • Quantifying image quality degradation due to these vibrations is challenging due to poor understanding of wind flow characteristics.

Purpose of the Study:

  • To improve the understanding of wind characteristics inside telescope enclosures.
  • To develop a model for dynamic wind loads on telescope structures.

Main Methods:

  • Utilized measurements from existing observatories.
  • Conducted wind-tunnel tests.
  • Performed computational fluid dynamic (CFD) analyses.

Main Results:

Related Experiment Videos

  • Characterized wind disturbances, including amplitude, temporal spectrum, and spatial distribution.
  • Defined wind disturbances as a function of relevant design parameters.
  • Enabled a model for dynamic wind loads on telescope structures.

    • Conclusions:

    • Significant progress has been made in understanding wind-induced vibrations in large optical telescopes.
    • The developed model provides a better basis for designing telescope structures to mitigate wind effects.
    • Improved understanding of wind characteristics is crucial for optimizing telescope performance.