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

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...

AI Technical Summary

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

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