Bionic slat design method based on owl wings

Abstract

The invention discloses a bionic slat design method based on owl wings and belongs to the field of air vehicle wing design. The bionic slat design method mainly includes the steps of extracting three-dimensional geometric structures of the owl wings; constructing bionic wing profiles; determining bionic slat profile curves; determining fixed wing front edge profile curves; determining starting points E of internal and external profile curves of bionic slats; determining starting points F of the fixed wing front edge profile curves; determining ending points C of the internal and external profile curves of the bionic slats; determining ending points H of the fixed wing front edge profile curves. The bionic slat design method based on the owl wings has the advantages that design efficiency is improved substantially, continuity of internal profiles of the slats and fixed wing configuration curved surfaces is guaranteed, design quality of the profiles and the curved surfaces of the slats is improved, and lift augmentation effect of the bionic slats is remarkable, so that the requirements of designing and analyzing on improvement in wing profile aerodynamic force in an air vehicle conceptual design stage can be met; limitations of a traditional design method are avoided, rapid assessment and modification on performance in a preliminary design scheme are achieved, and a design period is shortened.

Description

technical field [0001] The invention belongs to the design technology of aircraft wings, and relates to the improvement of the prior design method of the section curve of the leading edge slat of the aircraft. Background technique [0002] At low speeds, there is often a laminar boundary layer near the leading edge of the wing. Due to the large adverse pressure gradient on the surface, the separation of the boundary layer occurs, which seriously affects the performance of the airfoil. In order to improve the lift characteristics of the aircraft during take-off and landing, the leading edge of the wing is equipped with auxiliary equipment for improving lift, called slats. In the conceptual design of the aircraft leading edge slat, the design of the inner surface of the slat and the shape of the leading edge of the fixed wing are very critical. At present, the commonly used method is to first place multiple sections given by discrete points in the span direction, and then us...

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Problems solved by technology

[0004] Aiming at the problems of long design time and low efficiency faced in the conceptual design of the leading edge slat of the aircraft, the present invention aims to propose a design method of the bionic slat based on the owl wing in nature, that is, extracting from the wing section of the owl The geometric information of the small wing feathers, and design bionic slats based on this

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