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Special airfoil of low dynamic air vehicle in near space

A near-space, low-dynamic technology, applied in the field of special airfoils, can solve problems such as low lift coefficient and inability to meet the aerodynamic requirements of low-dynamic aircraft

Inactive Publication Date: 2017-05-17
XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under such a small Reynolds number, the available lift coefficient of the conventional airfoil is lower than 1.0, which cannot meet the aerodynamic requirements of low-dynamic aircraft in adjacent space
No published literature was retrieved on special airfoils for low-dynamic aircraft in near space

Method used

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  • Special airfoil of low dynamic air vehicle in near space
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  • Special airfoil of low dynamic air vehicle in near space

Examples

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Embodiment Construction

[0024] The airfoil of the present invention is adopted for the wing of a solar-powered aircraft in a near space, the lift coefficient of the linear section of the natural laminar flow and the turbulent flow conditions are all more than 1.6, the maximum lift coefficient is greater than 1.7, and the stall characteristic is moderate; when the design lift coefficient is 1.2, the lift-drag ratio exceeds 33.

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PUM

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Abstract

The invention belongs to the flight vehicle design technology and relates to a special airfoil of a low dynamic air vehicle in near space. The special airfoil is characterized in that 42 feature points are arranged on each of an upper chord line and a lower chord line, and adjacent feature points are in smooth transition. The special airfoil of the low dynamic air vehicle in the near space meets the aerodynamic force requirement of the low dynamic air vehicle in the near space.

Description

technical field [0001] The invention belongs to aircraft design technology, and relates to a special airfoil profile for an adjacent space low dynamic aircraft. Background technique [0002] The atmospheric environment near space (over 20,000m above sea level), the air density is extremely thin. In this altitude range, the flying Reynolds number of the low-dynamic aircraft is very small, about 150,000 to 300,000, and the required lift coefficient is greater than 1.0. At such a small Reynolds number, the available lift coefficient of conventional airfoils is lower than 1.0, which cannot meet the aerodynamic demands of low-dynamic aircraft in adjacent space. No public literature was retrieved on special airfoils for near-space low-dynamic aircraft. Contents of the invention [0003] The object of the present invention is to propose a special airfoil for low-dynamic aircraft in close space, so as to meet the aerodynamic demand of low-dynamic aircraft in close space. [000...

Claims

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Application Information

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IPC IPC(8): B64C3/14
CPCB64C3/14
Inventor 李权陈利丽李军府张德虎蒋汉杰
Owner XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
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