Aerodynamic trade studies in support of an interdisciplinary research program for large ground based telescopes are addressed. Numerous CFD (Computational Fluid Dynamics) trade studies were carried out to help identify the initial critical configuration of the telescope. The highest pressures induced on the reflective surface of the telescope mirror in the critical configuration were used in structural analysis. A module that correlated disparate discretizations in structural and fluid analyses through common parent geometry was developed. This module mapped surface pressures from the CFD discretization to the structural discretization using a weighted average technique. Experimental validation of the CFD results was carried out in the University of Kansas subsonic wind tunnel. The results from the CFD analysis and the wind tunnel experiments were in close agreement, with the maximum variation of pressures being 1%–8%. The preliminary telescope configuration that induced the highest pressure on the reflective surface of the primary mirror was identified as one inclined at 60° from the vertical plane and facing the wind directly. An “open-air” CFD model was developed that simulated the observatory shut-off operating conditions of 15 m/s wind speed and a fail-safe operating condition of 50 m/s wind speed. Critical local total gage pressures were 165 Pa and 1400 Pa at 15 and 50 m/s wind speeds respectively.
Skip Nav Destination
ASME 2005 Fluids Engineering Division Summer Meeting
June 19–23, 2005
Houston, Texas, USA
Conference Sponsors:
- Fluids Engineering Division
ISBN:
0-7918-4199-5
PROCEEDINGS PAPER
CFD Application for the Characterization of Surface Pressures on Telescopes Available to Purchase
Balaji Kaushik,
Balaji Kaushik
University of Kansas, Lawrence, KS
Search for other works by this author on:
Richard D. Hale,
Richard D. Hale
University of Kansas, Lawrence, KS
Search for other works by this author on:
Ray Taghavi
Ray Taghavi
University of Kansas, Lawrence, KS
Search for other works by this author on:
Balaji Kaushik
University of Kansas, Lawrence, KS
Richard D. Hale
University of Kansas, Lawrence, KS
Ray Taghavi
University of Kansas, Lawrence, KS
Paper No:
FEDSM2005-77345, pp. 663-667; 5 pages
Published Online:
October 13, 2008
Citation
Kaushik, B, Hale, RD, & Taghavi, R. "CFD Application for the Characterization of Surface Pressures on Telescopes." Proceedings of the ASME 2005 Fluids Engineering Division Summer Meeting. Volume 2: Fora. Houston, Texas, USA. June 19–23, 2005. pp. 663-667. ASME. https://doi.org/10.1115/FEDSM2005-77345
Download citation file:
6
Views
Related Proceedings Papers
Related Articles
The Effects of Wind and Posture on the Aerodynamic Performance During the Flight Stage of Skiing
J Biomech Eng (September,2011)
Numerical Simulation of Airborne Salt Particle Behavior in Dry Gauze Method Using Porous Media Model
J. Appl. Mech (October,2021)
Thermodynamics and Fluid Mechanics of a Closed Blade Cascade Wind Tunnel for Organic Vapors
J. Eng. Gas Turbines Power (May,2016)
Related Chapters
Electrostatic Technology for Control of Dust and Hydrocarbon Vapors in High Power Laser Systems
Laser Induced Damage in Optical Materials: 1981
3D Frame Structural Analysis Based on Imported Geometry at Preprocessing
International Conference on Mechanical and Electrical Technology 2009 (ICMET 2009)
Introduction to Contact Problems in Structural Mechanics
Contact in Structural Mechanics: A Weighted Residual Approach