Design method of self-adaptive wing profile

Abstract

The invention discloses a design method of a self-adaptive wing profile. Firstly, parameterized description of a selected initial wing profile is obtained with a CST parameterization method, an optimal design variable of local deformation is determined, populations are initialized with a selected optimization algorithm, domination sequencing is performed on the populations under the conditions that the lift-to-drag ratio reaching the maximum when the lift coefficient CL is equal to 0.9 and the maximum bending stress reaching the minimum after change of leading edge camber are taken as optimization objects and non-plastic deformation is taken as a constraint, and finally, an optimized wing profile meeting the terminal conditions is selected. With pneumatic characteristics expected by the wing profile as the design objects, a constraint relation between the self-adaptive wing profile and an original wing profile is established, a reasonable target wing profile can be provided for design of a deformation driving technology, the engineering implementability is improved, and the design optimization efficiency is further improved.

Description

technical field [0001] The invention belongs to the technical field of wing airfoil design, and in particular relates to an adaptive wing airfoil design method. Background technique [0002] The wing has a great influence on the flight performance of the aircraft, and it is also related to the structure of the body and the overall layout of the aircraft. When considering the parameter selection of the wing in an all-round way, the focus is on the selection of its section shape, that is, the airfoil and its plane shape geometric parameters. . The wing airfoil and its configuration on the wing have a great influence on the aerodynamic characteristics. Obviously, only a good airfoil and correct configuration can ensure that the wing has good aerodynamic characteristics. [0003] In the current wing airfoil design process, the shape of the airfoil is usually optimized according to a certain flight state and flight environment. , to achieve the use requirements of the airfoil i...

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Problems solved by technology

[0004] Judging from the current domestic patents on adaptive wing airfoils, part of the work is focused on the development of deformation drive technology. The adaptive wing airfoil that meets the requirements of the aerodynamic characteristics is used as a check index, so the design is relatively blind; there are also some literatures that carry out the design of the aerodynamic characteristics of the adaptive wing airfoil, but the scheme still uses the traditional airfoil optimization method, only considering the change of the airfoil. The aerodynamic characteristic index of the design process failed to put forward reasonable constraints, so that the designed airfoil is not practical in engineering

If the above two aspects of work are simply combined to make up for their respective deficiencies, then the entire design process is less efficient and does not apply

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