This paper presents an efficient aerodynamic method for interacting lifting surfaces in the presence of wake interaction over long distances. The near wake is modeled using the traditional lifting line with a shed vortex to capture the circulatory unsteady aerodynamics. The far-wake model is composed of a wake roll-up and consolidation model and a wake aging model. It is shown that this approach can save up to 97% the number of Biot–Savart function evaluations in a free-vortex wake implementation, while maintaining the error under 0.1%. The induced velocity by the trailing vortices do not show any singularity, and it depends on the spanwise distribution of circulation on the lifting surface. Two notional examples are used to illustrate the capability of this method: a rapid rolling motion of an airplane with prescribed target loads, and two fixed-wing aircraft tethered to the ground to harvest wind energy.
Efficient Aerodynamic Method for Interacting Lifting Surfaces over Long Distances
Journal of Aircraft ; 55 , 6 ; 2466-2475
2018-11-01
Article (Journal)
Electronic Resource
English
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