Low-wind-speed wind turbine blade

Abstract

The invention discloses a low-wind-speed wind turbine blade which is a skewed blade. A stacking line of the blade meets a specific curvilinear equation. The low-wind-speed wind turbine blade is large in output power and high in wind energy utilization rate.

Description

technical field [0001] The invention belongs to the technical field of wind power generators, in particular to a blade of a low wind speed wind power machine with large output power and high utilization rate of wind energy. Background technique [0002] Wind turbine blades are the core components of wind turbines, which determine the performance, load, and stability of wind turbines. With the gradual saturation of wind power generation in high wind speed areas and the increasing demand for clean energy, the research and development of low wind speed wind turbine blades is becoming more and more important. [0003] However, applying the straight blade design method suitable for high wind speeds to the design of low wind speed wind turbine blades requires: [0004] 1. Increase the length of the blade and the sweeping area of ​​the blade to increase the wind capture capacity of the blade. This method will increase the weight of the blades and increase the cost of wind power d...

AI Technical Summary

Problems solved by technology

However, it has the following three problems: (1) The miniaturization of the wind turbine at low wind speeds results in a very low Reynolds number, which easily produces laminar flow separation and laminar flow separation bubbles, which affects the aerodynamic performance of the wind turbine; (2) ) Small wind turbines need to overcome a larger motor resistance torque when starting; (3) Compared with the wind energy utilization coefficient of 0.4 or even above 0.5 of large wind turbines, the wind energy utilization coefficient of small wind turbines is still relatively low, generally below 0.3

[0006] Therefore, the problems in the prior art are: when straight blades are applied to low wind speed wind turbines, the output power is small and the utilization rate of wind energy is low.

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