A computational fluid dynamics (CFD)-based aero-optics validation study was conducted in wind tunnel tests at the US Air Force Academy. A 12 in diameter hemisphere-on-cylinder laser turret was tested in the 3 ft×3 ft subsonic wind tunnel at flow speeds ranging from mach 0.3 to 0.5. Flow validation was based on mean and rms velocity, mean pressure profile, rms unsteady pressure, and separation point. Optical validation was based on rms phase variance and inflow phase correlation length derived from two-dimensional Hartmann wavefront sensor data, measured over a 5 in beam. The CFD code used a two-equation turbulence model with partially-averaged Navier—Stokes approach. Good agreement was observed between measurements and predictions over line-of-sight angles ranging from 60 to 132° measured with respect to flow heading.
Wind tunnel validation of computational fluid dynamics-based aero-optics model
2009-04-01
14 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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