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Two-dimensional airfoil profile with low-Reynolds number and rotor wing with two-dimensional airfoil profile

A two-dimensional airfoil and low Reynolds number technology, applied in the rotor field, can solve the problems of small lift and poor aerodynamic performance, and achieve the effect of large lift, light weight and good aerodynamic deformation

Inactive Publication Date: 2014-02-19
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of low lift and poor aerodynamic performance in existing airfoils and rotors, the present invention provides a two-dimensional wing with high lift coefficient, low aerodynamic noise, high structural strength and low Reynolds number that is easy to manufacture. type and the rotor using this airfoil

Method used

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  • Two-dimensional airfoil profile with low-Reynolds number and rotor wing with two-dimensional airfoil profile
  • Two-dimensional airfoil profile with low-Reynolds number and rotor wing with two-dimensional airfoil profile
  • Two-dimensional airfoil profile with low-Reynolds number and rotor wing with two-dimensional airfoil profile

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specific Embodiment approach 1

[0065] Specific implementation mode one, such as figure 1 As shown, a two-dimensional airfoil under a low Reynolds number of the present invention consists of a leading edge 101, a first upper surface curve 102, a first transition curve 103, a convex curve 104, a second transition curve 107, and a second upper surface Curve 108, trailing edge 105, lower surface curve 106 and rib installation hole 3, according to front edge 101, first upper surface curve 102, first transition curve 103, raised curve 104, second transition curve 107, second The upper surface curve 108 , the rear edge 105 , the lower surface curve 106 , and the front edge 101 are sequentially connected to form a closed curve, and a rib installation hole 3 is provided between the raised curve 104 and the lower surface curve 106 .

[0066] In this embodiment, both the leading edge 101 and the trailing edge 105 are composed of two sides including an acute angle, and the vertices of the leading edge 101 and the trail...

specific Embodiment approach 2

[0092] Specific implementation mode two, such as figure 2 As shown, the blade 6 is mainly composed of a wing tip 201 , a wing body 202 , a wing root 203 and a wing hub 204 which are smoothly connected in sequence.

[0093] In this embodiment, the station position refers to the position of the two-dimensional airfoil along the extension direction of the blade 6. Specifically, the installation hole 7 is taken as the origin, the extension direction of the blade 6 is the x-axis, and the two-dimensional airfoil The coordinates of the two-dimensional airfoil on the x-axis are represented by r, that is, the position of the two-dimensional airfoil along the extension direction of the blade 6, then the station position of the two-dimensional airfoil is r, if the radius of the blade 6 is represented by R, then the two-dimensional airfoil Airfoil position r=aR, a is a constant, 0≤a≤1, such as figure 2 As shown, the radius R of the blade 6 is the distance from the center of rotation of...

specific Embodiment approach 3

[0114] Specific implementation mode three, such as image 3 As shown, the rotor of the present invention is composed of a plurality of blades 6 in Embodiment 3, and the plurality of blades 6 are connected in the same direction through the hubs 204 in their respective structural compositions to form a rotor.

[0115] In this embodiment, the number of blades 6 is 2, 3, 4, 5, 6 or 7, preferably 2 or 3, more preferably 3.

[0116] In this embodiment, if image 3 As shown, the rotor is formed by connecting three blades 6 through the hubs 204 in their respective structures, and the three hubs 204 are fixedly connected or integrally connected in the same direction to form a connection structure 8. The mounting hole 7 where the motor or the diesel engine is connected, and the center of the connecting structure 8 are provided with a central mounting hole 9, and the center of the central mounting hole 9 is the rotation center of the rotor.

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Abstract

The invention discloses a two-dimensional airfoil profile with low-Reynolds number and a rotor wing with the two-dimensional airfoil profile, relating to the field of aerodynamics and hydromechanics, and solving the problems of low lift and poor aerodynamic performance of an existing airfoil profile and an existing rotor wing. The two-dimensional airfoil profile consists of a front edge, a first upper surface curve, a first transitional curve, a convex curve, a second transitional curve, a second upper surface curve, a rear edge, a lower surface curve and a reinforcing rib installation hole, wherein the front edge, the first upper surface curve, the first transitional curve, the convex curve, the second transitional curve, the second upper surface curve, the rear edge, the lower surface curve and the front edge are connected in sequence to form a closed curve; the reinforcing rib installation hole is formed between the convex curve and the lower surface curve. The two-dimensional airfoil profile with the low-Reynolds number and the rotor wing with the two-dimensional airfoil profile simultaneously have the characteristics of high lift coefficient, low aerodynamic noise, high structural strength, convenience in manufacturing and the like.

Description

technical field [0001] The invention relates to the technical fields of aerodynamics and fluid mechanics, in particular to a two-dimensional airfoil at a low Reynolds number and a rotor adopting the airfoil. Background technique [0002] The micro-rotor aircraft has the capabilities of vertical take-off and landing, hovering in the air and low-speed flight, and is especially suitable for completing specified tasks in narrow environments, and has attracted extensive attention from research institutions and companies in various countries. The rotor is not only the lifting surface of the aircraft, but also the control surface and the propulsion surface. The performance of the rotor directly affects the performance of the entire aircraft. The airfoil is the two-dimensional section of the rotor, which is the source of the pressure difference between the upper and lower surfaces of the rotor. It has an important impact on the lift or thrust of the rotor, the aerodynamic noise and ...

Claims

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Application Information

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IPC IPC(8): B64C27/467
Inventor 高庆嘉白越宫勋孙强
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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