Wind wheel blade, cross-flow wind wheel and design method of wind wheel blade

A technology of wind turbine blades and design methods, which is applied to the components of pumping devices for elastic fluids, mechanical equipment, non-variable pumps, etc., and can solve the problems of low energy conversion efficiency and difficulty in ensuring fluid dynamic characteristics, etc. , to effectively control the flow separation, reduce the total value of noise, and reduce the effect of eddy current noise

Active Publication Date: 2015-04-29
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology

[0003] The purpose of the present invention is to provide a wind rotor blade, a cross-flow wind rotor and a design method of the wind rotor blade, so as to solve the problem that the cross-flow wind rotor in the prior art adopts arc-shaped blades, which makes it difficult to ensure the hydrodynamic characteristics and the energy conversion efficiency is relatively low. low problem

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  • Wind wheel blade, cross-flow wind wheel and design method of wind wheel blade
  • Wind wheel blade, cross-flow wind wheel and design method of wind wheel blade

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[0023] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0024] see figure 1 As shown, in the arc-shaped blade 10' in the prior art, on the section perpendicular to the rotation axis of the wind rotor (the following sections refer to the section of the blade taken perpendicular to the rotation axis of the wind rotor), the section curves of the upper and lower surfaces of the blade chord The distance between the lines is equal, the curvature of the surface curve is also unchanged, and then the two ends of the surface curve are directly connected to the arc closed (the above "upper surface" and "lower surface" are not absolute up and down directions, but as two The designation of the opposite surface can be understood as the upper surface refers to th...

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Abstract

The invention provides a wind wheel blade, a cross-flow wind wheel and a design method of the wind wheel blade. The section curve of the upper surface/the lower surface of the wind wheel blade is provided with a curvature gradual-changing section. According to the technical scheme, since the adoption of the surface provided with the curvature gradual-changing section, the cross-flow wind wheel blade is more advantageous in aerodynamics. Therefore, the efficiency of a ventilation wheel is improved, the total value of noise is reduced, the peak value of the blade passing frequency (BPF) during rotation and the flow separation of the vortex flow can be effectively controlled, and the noise of the vortex flow and loss can be reduced.

Description

technical field [0001] The invention relates to the field of wind rotor structure, in particular to a design method of a wind rotor blade, a cross-flow wind rotor and the wind rotor blade. Background technique [0002] In the design and development of the wind rotor system, the wind rotor is its main component, and the blade is the most important part of the cross-flow wind rotor. It is the only element for energy conversion, so the quality of the blade design directly determines the efficiency of the wind rotor. high and low. The shape of the blade basically has three types: straight line, arc type and airfoil type. At present, the arc type blade is more widely used in the cross-flow wind turbine system. The arc type blade is not easy to ensure the hydrodynamic characteristics, and the efficiency is low. , the total value of noise is high, and the lift coefficient and drag coefficient have not reached the optimal value. Contents of the invention [0003] The purpose of ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/30
CPCF04D29/281F04D29/30F04D29/666
Inventor 张伟捷熊军姚锋刘池
Owner GREE ELECTRIC APPLIANCES INC
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