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Drag reduction surface structure of underwater vehicle shell

A technology of underwater vehicle and surface structure, which is applied in the direction of hull, ship construction, hull design, etc., can solve the problems of high navigation resistance and unsatisfactory effect of the vehicle, so as to improve the navigation speed and stability and reduce energy consumption , Significant economic and environmental benefits

Active Publication Date: 2021-08-03
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the traditional drag reduction technology acts on the surface of the aircraft, it often presents a symmetrical structure, and the effect is not satisfactory, so the navigation resistance of the aircraft is still relatively large

Method used

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  • Drag reduction surface structure of underwater vehicle shell
  • Drag reduction surface structure of underwater vehicle shell
  • Drag reduction surface structure of underwater vehicle shell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] This embodiment is used to manufacture the novel underwater vehicle shell that adopts the drag-reducing surface, and selects the method of stencil printing to construct the drag-reducing structure on the surface of the shell, such as figure 2 As shown, the feather-shaped drag-reducing structure forming the feather-shaped drag-reducing structure array is composed of a rachis structure 2 and a barb structure 3, the rachis structure 2 is composed of ravines, the barb structure 3 is composed of protrusions, and the barb structure 3 The included angle with the fluid flow direction is 45 degrees. The cross-sectional shapes of rachis and protrusions are circular, rachis structure 2 and barb structure 3 are linear, and the width ratio of rachis structure and barb structure is 3:1. The feather-shaped drag-reducing structure is evenly distributed on the upper surface of the aircraft shell, and the structural size is fixed and uniformly distributed. As the depth increases, the de...

Embodiment 2

[0044] This embodiment is used to manufacture a new type of underwater vehicle shell with a drag-reducing surface, and the method of 3D printing is selected to construct the drag-reducing structure of the shell surface, such as image 3 As shown, the feather-shaped drag-reducing structure constituting the feather-shaped drag-reducing structure array is composed of a rachis structure 2 and a barb structure 3, the rachis structure 2 is a raised structure, the barb structure 3 is a ravine structure, and the barb structure 3 The included angle with the fluid flow direction is 30 degrees. The cross-sectional shape of the protrusion is circular, the rachis structure 2 is linear, the barb structure 3 is curved, and the width ratio of the rachis structure 2 and the barb structure 3 is 2:1. The feather-shaped drag reducing structure is evenly distributed on the upper surface of the aircraft shell, and the structure size of the feather shaft on the upper surface is larger than the struc...

Embodiment 3

[0051] This embodiment is used to manufacture a new type of underwater vehicle shell with a drag-reducing surface. The laser direct writing method is selected to construct the drag-reducing structure on the surface of the shell. The feather-shaped drag-reducing structure forming the array of feather-shaped drag-reducing structures consists of The rachis structure 2 and the barb structure 3 are composed of the rachis structure 2 and the barb structure 3, both of which are ravine structures, and the angle between the barb structure 3 and the direction of fluid flow is 20 degrees. The cross-sectional shape of the rachis is circular, the rachis structure 2 is linear, the barb structure 3 is linear, and the width ratio of the rachis structure 2 and the barb structure 3 is 3:1. The feather-shaped drag-reducing structure is evenly distributed on the upper surface of the aircraft shell, and the structure size of the feather shaft on the upper surface is smaller than the structure size ...

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Abstract

The invention discloses a drag reduction surface structure of an underwater vehicle shell. The surface structure comprises feather-shaped drag reduction structure arrays arranged on an underwater vehicle shell, and the feather-shaped drag reduction structure arrays are asymmetrically distributed on the upper surface and the lower surface of the underwater vehicle shell. The asymmetric distribution is one or a combination of more of asymmetric structures, asymmetric structure sizes or asymmetric arrangement modes of the feather-shaped resistance reduction structure array on the upper surface and the lower surface of the shell of the underwater vehicle; and feather-shaped resistance reduction structures forming the feather-shaped resistance reduction structure array are composed of feather shaft structures and feather branch structures, the feather shaft structures are arranged in the flow direction of fluid on the surface of an aircraft shell, and the feather branch structures are distributed on the two sides of the feather shaft structures in the downstream direction. The asymmetric underwater vehicle surface can effectively reduce the frictional resistance between the vehicle and water, achieves the beneficial effects of energy conservation and emission reduction, and can improve the navigation stability of the vehicle.

Description

technical field [0001] The invention belongs to the field of fluid mechanics, in particular to a surface structure, in particular to a drag-reducing surface structure of an underwater vehicle shell. Background technique [0002] An underwater vehicle is a vehicle that sails underwater, including manned underwater vehicles and unmanned underwater vehicles, which can complete underwater exploration, detection, and even military offensive and defensive tasks. Now that ocean development is becoming more and more important, underwater vehicles are getting more and more attention from various countries, and they play an important role in both civilian and military use. However, when navigating in the ocean, due to the interaction with seawater flow, fluid resistance and noise are generated, resulting in reduced speed and combat performance of underwater weapons. [0003] At present, the drag reduction technologies of aircraft are generally turbulent drag reduction on groove surfa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63B1/34B63B1/40
CPCB63B1/40B63B1/34Y02T70/10
Inventor 薛龙建李倩吴悠陈雯慧林振
Owner WUHAN UNIV