Micro-nano drag reduction structure for high-altitude and high-speed environment

Abstract

The invention provides a micro-nano drag reduction structure for a high-altitude and high-speed environment, which comprises a groove formed in the outer surface of an aircraft, the groove is strip-shaped, the cross section of the groove is an isosceles triangle, the vertex angle of the cross section of the groove is positioned at the bottom of the groove, and the length of the bottom edge of thecross section of the groove is between 150nm and 200nm. The grooves and high-speed airflow form a certain angle, a plurality of grooves are formed in the outer surface of the aircraft in the directionperpendicular to the length direction of the grooves at equal intervals, a partition strip is formed between any two adjacent grooves, the length direction of each partition strip is parallel to thelength direction of the corresponding groove, and the cross section of each partition strip is in an isosceles triangle shape. The vertex angle of the cross section of the dividing strip is located atthe top end of the dividing strip. The viscous resistance near the boundary layer of the near-wall surface can be reduced, the frictional resistance of high-speed gas to the aircraft can be reduced,the structure is simple, the work is reliable, and the drag reduction effect is good.

Description

technical field [0001] The invention relates to the technical field of object surface drag reduction design, in particular to a micro-nano drag reduction structure used in high-altitude and high-speed environments. Background technique [0002] With the development of aerospace technology, the research and development and design technology of aircraft are becoming more and more mature. [0003] At present, there are many aircrafts on the market that operate at high altitudes. When the aircrafts fly at high altitudes at high speeds, they will be subject to greater air resistance, which will affect the range and speed of the aircrafts. [0004] The existing Chinese patent with the publication number CN105644770B discloses a drag-reducing wing imitating shark skin. A speed sensor is installed on the surface of the fuselage, and a skin layer is attached to the surface of the wing. The surface of the skin layer has a group of curved raised ribs. , A groove is formed between two ...

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Problems solved by technology

[0005] The inventor believes that the structure of the drag reducing device in the prior art is complicated, the effect of drag reduction is poor, and there is room for improvement

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