Optimization of tip elements of lifting systems based on the criterion of the minimum inductive drag
V.G. Borisova, V.A. Silantiev
Chaplygin Siberian Scientific Research Institute of Aviation, Novosibirsk, Russia
Keywords: optimization, inductive drag, tip surface, wing tip, Trefftz plane, circulation, aerodynamic design
Abstract
A numerical method of inductive drag reduction by means of improving the aerodynamic performance of the tip elements of lifting systems is presented. The method allows one to optimize the distribution of the intensity of free vortices at the wing tips in the Trefftz plane for a prescribed lift force and unchanged base wing geometry. Optimization calculations of various lift systems are performed, including the STR-40DT short-range airplane developed at the Chaplygin Siberian Scientific Research Institute of Aviation (SibNIA). Good agreement of the numerical and experimental results is noted.
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