Wing with pits

Abstract

The invention belongs to the technical field of aircrafts, and particularly relates to a wing with pits. The wing comprises a front edge, an upper surface, a lower surface, a rear edge and a wing body. The front edge is thick and round, the upper surface is an upwards-protruding curved surface, the lower surface of a plane or a curved surface which slightly protrudes downwards or a curved surface which is slightly concaved upwards, the identical small pits are evenly distributed in all the area, from the thickest portion of the wing to the rear edge, of the upper surface in the wing chord direction, the average depth of the small pits is about 0.25 mm, the largest boundary dimension of the small pits is between 1 mm and 10 mm, and the clear distance between every two adjacent small pits is between 1 mm and 3 mm. The largest lift-drag ratio of the wing is large, the range of the effective angle of incidence is large, and the wing is not prone to stalling, high in efficiency and high in strength.

Description

technical field [0001] A wing with pits belongs to the technical field of aircraft, and in particular relates to a wing for generating lift. Background technique [0002] The surface of the traditional airfoil is smooth. There are symmetrical and asymmetrical airfoils. They can all generate lift, but the range of effective angle of attack is not large. When the angle of attack increases to a certain extent, the airflow on the upper surface will separate, that is, a stall phenomenon will occur, the resistance will rise suddenly, and the lift will drop suddenly; in order to reduce the resistance of the air , the rear section of the traditional wing is very slender near the trailing edge, and the trailing edge is tapered, so the strength is low and the manufacture is also inconvenient. Contents of the invention [0003] The purpose of the present invention is to overcome the above-mentioned deficiency of traditional wing, invent a kind of wing with pit on the upper surface t...

AI Technical Summary

Problems solved by technology

[0002] The surface of the traditional airfoil is smooth. There are symmetrical and asymmetrical airfoils. They can all generate lift, but the range of the effective angle of attack is not large. When the angle of attack increases to a certain extent, the airflow on the upper surface will separate, that is, a stall phenomenon will occur, the resistance will rise suddenly, and the lift will drop suddenly; in order to reduce the resistance of the air , the rear section of the traditional wing is very slender near the trailing edge, and the trailing edge is tapered, so the strength is low and the production is inconvenient

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