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Low-Reynolds-number airfoil profile with cooperative fluidic control, and control method thereof

A low Reynolds number, cooperative jet technology, applied in the field of low Reynolds number airfoil and its control, can solve the problems of not being able to achieve the best control effect, increase the lift stall characteristics, energy supply limitations, etc., to avoid the design of the ventilation pipeline, Effects of reducing energy consumption and reducing operating costs

Active Publication Date: 2014-11-19
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

Its disadvantage is that this kind of control is pre-set, and in the non-design state, the best control effect cannot be achieved
[0005] For low Reynolds number aircraft, such as high-altitude drones, stratospheric airships, etc., the aerodynamic efficiency is not high due to the influence of their aerodynamic characteristics
At the same time, this type of aircraft is usually designed to stay in the air for a long time, and due to the limitation of energy supply, the low aerodynamic efficiency is an urgent problem to be solved
However, the existing active flow control methods for improving the aerodynamic characteristics of the airfoil still have great limitations, and it is difficult to significantly increase the lift force, greatly improve the stall characteristics, and then improve the performance of the aircraft

Method used

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  • Low-Reynolds-number airfoil profile with cooperative fluidic control, and control method thereof
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  • Low-Reynolds-number airfoil profile with cooperative fluidic control, and control method thereof

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Embodiment Construction

[0028] The present invention is described in detail below in conjunction with accompanying drawing:

[0029] The present invention provides a low Reynolds number airfoil with cooperative jet control, such as figure 1 As shown, it is a cross-sectional view of the airfoil. The airfoil 2 is provided on the leading edge of the upper surface of the airfoil 1, and the air inlet 3 is arranged on the rear edge of the upper surface of the airfoil 2; The airflow pipeline 5 communicates with each other to form a blowing and suction circuit; an air pump 4 for driving suction and jetting at the same time is installed in the airflow pipeline 5; as a preferred method, the air injection port 2 is arranged at the position of 7.0% to 10% of the chord line , the height of the jet port 2 is 0.8% to 1.5% of the chord length; the suction port 3 is set at 80% to 88% of the chord line, and the height of the suction port 3 is 0.8% to 1.5% of the chord length. Among them, the chord line refers to the ...

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Abstract

The invention provides a low-Reynolds-number airfoil profile with cooperative fluidic control, and a control method thereof. The low-Reynolds-number airfoil profile with cooperative fluidic control is characterized in that an air jet port (2) is formed in the front edge of the upper surface of an airfoil profile body (1); an air suction port (3) is formed in the rear edge of the upper surface of the airfoil profile body (1); the air jet port (2) is communicated with the air suction port (3) through an air flow pipeline (5) which is arranged inside the airfoil profile body (1); an air pump (4) which is used for driving air suction and air jet to be carried out simultaneously is mounted in the air flow pipeline (5); moreover, the air jet port (2) and the air suction port (3) are perpendicular to the upper surface of the airfoil profile body (1) respectively. The lift of the airfoil profile is greatly increased, the resistance is obviously reduced, and the stalling characteristic of the airfoil profile is improved, so that the aim of efficiently improving the aerodynamic performance of an aircraft is achieved; in addition, the low-Reynolds-number airfoil profile also has the characteristic of low energy consumption.

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 cooperative jet control and a control method thereof. Background technique [0002] The wing is the main part of the aircraft to generate lift, and its cross-sectional shape is the airfoil. The aerodynamic characteristics of the airfoil directly affect the lift and drag of the wing. At present, conventional design methods are difficult to greatly improve the aerodynamic characteristics of the airfoil, but the flow control method can break through the limitations of traditional design methods, achieve the effect of significantly improving the lift-drag characteristics of the airfoil, and thus significantly improve the performance of the aircraft. [0003] At present, passive flow control methods have been widely used in engineering. Passive flow control refers to changing the flow environment through passive flow control device...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64C3/10B64C3/36B64C11/18B64C27/467
Inventor 杨旭东宋超朱敏张顺磊宋文萍许建华宋笔锋安伟刚王海峰李育斌张玉刚
Owner NORTHWESTERN POLYTECHNICAL UNIV
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