Straight wing type wind and water turbine

Abstract

A Straight blade type turbine has at least one two-dimensional blade positioned in parallel with and around a central axis of the turbine. The two-dimensional blade has a cross section with a blade chord turned around a center of the two-dimensional blade by an angle of 3° to -2° relative to a line perpendicular to another imaginary line connecting the central axis with the center of the two-dimensional blade. A distance between a fore end and the center of the cross section is 15 to 40 percent of a chord length of the blade. NC / R, which is calculated by a radius R extending from the axis to the center of two-dimensional blade, the chord length C, and the number N of the two-dimensional blades, is between 0.5 and 2.2. A maximum thickness of the two-dimensional blade is between 20 and 25 percent of the chord length. The turbine has a strut blade having a symmetric cross section joining the two-dimensional blade to a side of the central axis, the strut blade having a maximum thickness which is between 15 and 20 percent of a chord length of the strut blade.

Description

technical field [0001] The present invention relates to, for example, a linear airfoil-type wind-water vehicle arranged around a vertical shaft and connected to the shaft side by a supporting wing. Optimizing performance, mounting angle and wing thickness etc. Background technique [0002] In recent years, wind power generation and hydropower generation have been re-emphasized from the viewpoint of energy conservation and protection of the natural environment. [0003] For wind power generation, conventionally, horizontal-axis windmills using propellers have been the mainstream. The propeller-type windmill has various disadvantages. On the contrary, it has high self-starting performance and does not require a special starting device. It needs directivity relative to the wind direction, and a device for making the propeller face the direction of the wind is required. Moreover, due to the complicated shape of the propeller, it is difficult to Mass production and processing. ...

AI Technical Summary

Problems solved by technology

[0006] However, conventional vertical axis wind turbines have very low self-starting performance, so various equipment such as a motor for starting and a control device for controlling the motor are required, and although simple-shaped blades are used, there are problems in increasing the size of the device and increasing the cost. The problem

In addition, in order to obtain high efficiency (output coefficient), it takes a lot of hard work, such as working hard on the airfoil.

In addition, the cutting wind noise is loud when turning, and countermeasures need to be found

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