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Low-Reynolds-number airfoil section with multi-seam synergetic jet flow control and control method

A technology of synergistic jet flow and low Reynolds number, applied in the direction of wings, heat reduction structures, aircraft parts, etc., can solve problems such as unseen solutions, avoid the design of ventilation pipelines, reduce the sliding distance, and save fuel Effect

Active Publication Date: 2015-05-06
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, there is still no effective solution

Method used

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  • Low-Reynolds-number airfoil section with multi-seam synergetic jet flow control and control method
  • Low-Reynolds-number airfoil section with multi-seam synergetic jet flow control and control method
  • Low-Reynolds-number airfoil section with multi-seam synergetic jet flow control and control method

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Embodiment Construction

[0027] The present invention is described in detail below in conjunction with accompanying drawing:

[0028] The present invention provides a low Reynolds number airfoil with multi-slot cooperative jet control, such as figure 1 As shown, it is a cross-sectional view of the airfoil, and the jet port 2 is set on the leading edge of the upper surface of the airfoil 1, see figure 2 , is a partial enlarged view of the air jet, and an air suction area 3 formed by a plurality of neatly arranged air suction microholes 10 is set on the rear edge of the upper surface of the airfoil 1; see image 3 , is a schematic diagram of micropore layout in the suction area; as a preferred method, the air injection port 2 is set at 15% to 20% of the chord line, and the height of the air injection port 2 is 3% to 5% of the chord length; the air suction area 3 is arranged At the position of 40% to 60% of the chord line, the range of the entire suction area accounts for 20% of the chord length; the d...

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Abstract

The invention provides a low-Reynolds-number airfoil section with multi-seam synergetic jet flow control and a control method. The low-Reynolds-number airfoil section with multi-seam synergetic jet flow control comprises a jet exhaust (2) arranged on the front edge of the upper surface of the airfoil section (1), wherein a suction area (3) formed by a plurality of orderly arranged suction tiny holes (10) is arranged on the rear edge of the upper surface of the airfoil section (1); the jet exhaust (2) is communicated with the suction area (3) through an airflow pipeline (5) in the airfoil section (1) to form a suction loop; an air pump (4) for driving the synchronous operation of suction and injection is installed in the airflow pipeline (5); the jet exhaust (2) and the suction tiny holes (10) are vertical to the upper surface of the airfoil section (1). The suction control technology is applied to the low-Reynolds-number airfoil section, the lifting-resistance characteristic of the airfoil section is improved and the aerodynamic characteristic of a high-altitude vehicle is perfected by controlling the laminar separation of the low-Reynolds-number airfoil section; the airfoil section has the advantages of low power consumption, so that the aerodynamic efficiency of the high-altitude vehicle is improved.

Description

technical field [0001] The invention belongs to the technical field of fluid control, and in particular relates to a low Reynolds number airfoil with multi-slot cooperative jet control and a control method. Background technique [0002] High-altitude aircraft such as high-altitude drones and stratospheric airships work in areas above 20km above sea level. Due to the high flying altitude and the thin atmosphere (the air density is 1 / 14 of that on the ground), this type of high-altitude aircraft has the characteristics of low cruising Reynolds number. Under the condition of low Reynolds number, laminar flow separation is easy to occur under the small angle of attack of ordinary airfoil. If the turbulent flow can overcome the influence of the reverse pressure gradient, flow reattachment will occur. The region between the separation point and the reattachment point is called the separation bubble. The existence of separation bubbles will have a serious impact on the low Reynol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B64C3/36B64C3/00
Inventor 杨旭东宋超朱敏张顺磊许建华宋文萍宋笔锋安伟刚王海峰李育斌张玉刚
Owner NORTHWESTERN POLYTECHNICAL UNIV
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