MULTI-MODE AERODYNAMIC SURFACE Russian patent published in 2018 - IPC B64C23/06 

FIELD: manufacturing technology.

SUBSTANCE: multi-mode aerodynamic surface contains the main part and the teeth. Main part – the upper and lower sides, mating with each other with the formation of the front and rear edges. Each tooth includes a vertex, an upper surface, a lower surface and an incoming edge and is mounted on the leading edge of the main body, with the possibility of generating vortex structures. Cavities are made on the aerodynamic surface. Upper surfaces of the teeth are made convex with the possibility of partial straightening of the air flow passing over the teeth and smoothly mate with the upper side of the main part. Incoming tooth edges contain lateral faces and pointed portions, that are formed by the mating of the upper and lower surfaces of the teeth. Lateral faces adjoin the pointed portions, are located in the spaces between the leading edge of the main body and the divergent upper and lower tooth surfaces. Cavities are made opposite the teeth on the underside of the main body and are formed by bottom and side surfaces. Bottom surfaces of the cavities smoothly mate with the lower surfaces of the teeth and with the lower side of the main part with the possibility of straightening the air flow passing under the teeth. Lateral surfaces of the cavity are crescent shaped and come to naught in the zone of conjugation of the bottom surfaces of the cavities with the lower side of the main part, and also near the junctions of the lateral faces of the teeth to the leading edge of the main part.

EFFECT: invention is aimed to improve aerodynamic damping at small angles of attack and increase the bearing capacity.

7 cl, 13 dwg