Publication Date:
2019-07-13
Description:
A series of large scale wind tunnel experiments were conducted on a gimbal mounted Cassegrainian telescope enclosed in a shroud with various aerodynamic fairings. The optical aperture was open to the airstream, resulting in acoustic inputs to the telescope. Resonance was shown to be dependent on free stream Mach number, internal cavity and external fairing geometry, and the angle of the plane of the opening relative to the free stream direction. Configurations were found which caused low noise and low unsteady internal loads at the expense of decreased view angle. Air injection over the cavity aided in reducing acoustic resonance.
Keywords:
AERODYNAMICS
Type:
AIAA PAPER 74-195
,
Aerospace Sciences Meeting; Jan 30, 1974 - Feb 01, 1974; Washington, DC
Format:
text
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