Wing with pits

A wing and dimple technology, applied in the field of aircraft, can solve problems such as small range, separation, and low strength

Inactive Publication Date: 2014-11-12
FOSHAN SHENFENG AVIATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Embodiment Construction

[0009] now attached Figure 1~2 The present invention is specifically described: a wing with pits, comprising a leading edge 1, an upper surface 2, a lower surface 4, a trailing edge 3 and a wing body 5. The leading edge 1 is thick and round, the upper surface 2 is an upwardly convex curved surface, the lower surface 4 is basically a plane, and the upper surface 2 is uniformly distributed along the chord direction from the thickest part 7 of the wing to the entire area of ​​the rear edge 3. These small pits 6 are circular, with a depth of 0.25mm and a diameter of 5mm; the clear distance between every two adjacent small pits 6 is 2mm. The wing body 5 is a solid structure or a frame structure. When a frame structure is adopted, the skin on the upper surface 2 of the wing adopts a thicker hard material to make small pits 6 conveniently. The planar shape of the wing is rectangular, and the airfoil adopts a traditional convex and flat airfoil, which removes about 40% of the rear p...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64C3/00B64C21/00
Inventor 王志成
Owner FOSHAN SHENFENG AVIATION SCI & TECH
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