A synthetic jet vertical axis wind turbine blade

Abstract

The invention discloses a synthetic jet flow jet type vertical axis wind turbine blade. An air inlet gap, an air inlet channel, an air jet power cavity and an air exhaust channel are sequentially arranged in the chord length direction of the blade; the air inlet gap is positioned on the front edge side of the blade; one end of the air inlet channel communicates with the air inlet gap; the other end of the air inlet channel communicates with the air jet power cavity; one end of the air exhaust channel communicates with the air jet power cavity; the other end of the air exhaust channel is positioned on the tail edge side of the blade and communicates with the atmosphere; an air inlet valve is arranged in the air inlet channel; an air exhaust valve is arranged in the air exhaust channel; an air jet power mechanism is arranged in the air jet power cavity; the air jet power mechanism comprises two piezoelectric ceramic sheets and two vibrating diaphragms; the two vibrating diaphragms are arranged in parallel; the air inlet channel communicates with the air exhaust channel through a gap between the vibrating diaphragms; the cavity spaces at the two sides of the vibrating diaphragms do not communicate with each other; the two piezoelectric ceramic sheets are respectively and fixedly arranged in the centers of the two vibrating diaphragms; a power supply is arranged inside the blade; and the piezoelectric ceramic sheets are electrically connected with the power supply.

Description

Technical field [0001] The invention belongs to the technical field of wind power generation, and particularly relates to a synthetic jet jet vertical axis wind turbine blade. Background technique [0002] With the rapid development of the world economy, the demand for energy is also increasing. Especially since the beginning of the 21st century, the prices of coal and oil have continued to rise and consumption has increased sharply. Traditional energy is far from meeting the development needs of today's society. Renewable energy sources such as wind, solar, and hydropower have come into people’s vision. Wind energy has become an important part of the current world energy structure due to its large reserves, wide distribution, low development threshold, and high utilization rate. [0003] Wind energy is a kind of usable energy provided to mankind by the work of air flow. The higher the air velocity, the greater the kinetic energy. The magnitude of wind energy depends on the wind sp...

AI Technical Summary

Problems solved by technology

[0004] At present, vertical axis wind turbines have three forms of utilizing wind energy, including lift vertical axis wind turbines, drag vertical axis wind turbines and lift-drag hybrid vertical axis wind turbines, among which lift vertical axis wind turbines are currently the most widely used , because it can have a higher wind energy utilization coefficient, but as a lift type vertical axis wind turbine, due to the periodic movement of the blades, the blades can only do positive work in the range of positive attack angles with the incoming flow, and can provide rotational power for the impellers. However, in the circular motion of the blades, the range of the positive angle of attack of the blades is very small, the lift that can be provided is limited, and the starting performance is poor, so the power generation efficiency of the lift type vertical axis wind turbine is low

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