An Optimal Design Method of Corrugated Airfoil for Aircraft

Abstract

The invention relates to a corrugated airfoil profile for aircraft and an optimal design method thereof. The corrugated airfoil profile is made by modifying based on an original standard airfoil profile. In addition to the middle portion of each of front and rear edge portions being a corrugation curve formed by connecting multiple corrugation segments end to end, each corrugation segment of a lower edge curve of the corrugated airfoil profile includes a peak and a trough, the corrugations of the corrugation curve are distributed evenly or distributed proportionally; even distribution of the corrugations refers to the corrugations of each corrugation segment being equal in length; proportional distribution of the corrugations refers to: corrugation length of each corrugation segment is equal to a ratio of airfoil profile thickness in the position corresponding to the corrugation segment. Compared with the prior art, the invention has the advantages that lift drag performance and structural performance of low-speed airfoil profile can be improved, structural size and weight can be reduced under same task load conditions, and fuel economy and flight performance can be improved.

Description

technical field [0001] The invention relates to an airfoil structure for an aircraft, in particular to a corrugated airfoil for an aircraft and an optimal design method thereof. Background technique [0002] In various flight states of the aircraft, the wing is the main component for the aircraft to bear the lift, while the vertical tail and the horizontal tail are the aerodynamic components for the stability and maneuverability of the aircraft. Generally, an airplane has a plane of symmetry. If a knife is cut parallel to the plane of symmetry at any position in the span of the wing, the section of the cut wing is called a wing section or airfoil. Airfoil is an important part of wing and empennage shaping, which directly affects the aerodynamic performance and flight quality of the aircraft. [0003] For different flight speeds, the airfoil shape of the wing is different, for example: [0004] For low-subsonic aircraft, in order to increase the lift coefficient, the airfoi...

AI Technical Summary

Problems solved by technology

Since the inflatable aircraft is an emerging technology, and the wavy structure is difficult to achieve on the traditional metal wing, there is no structure that uses the wavy airfoil of the lower wing in the rigid wing.

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