A fast low-order computational approach is presented for estimating the aero-optic effect of the rotor tip vortex system on helicopter-borne optical systems. The approach employs prescribed-wake methods that have been developed by the helicopter design community to rapidly generate realistic approximations to the vortex-wake systems of helicopters in hover and forward flight. With the geometry of the vortex-wake system defined, an experimentally validated computational method that employs the isentropic assumption is then used to compute pressure, temperature, density, and index-of-refraction fields in the selected computational domain. Predictions determined using the computational approach for the spatially and temporally resolved aero-optic aberrations on an optical system mounted on a helicopter in hover and forward flight are presented.
Computation of the Aero-Optical Environment of a Helicopter Using Prescribed-Wake Methods
AIAA journal ; 53 , 3
2015
Aufsatz (Zeitschrift)
Englisch
Helicopter Rotor BVI Airloads Computation Using Advanced Prescribed Wake Modelling
British Library Conference Proceedings | 2011
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