Wind turbine rotor with stub wing panels and Venturi tube effect

Abstract

The invention relates to a wind turbine rotor with stub wing panels and Venturi tube effect, which comprises a Darrieus cage type wind wheel and a rotating spindle of the cage type wind wheel, whereinthe cage type wind wheel is a cage type blade assembly consisting of a plurality of flexible bar-like blades; the rotating spindle of the wind turbine rotor and the cage type wind wheel are arrangedhorizontally and face the wind along the axial direction; and the periphery of the cage type wind wheel is additionally provided with a plurality of stub wing panels evenly arranged around the circumference thereof. Compared with the prior art, the invention fully utilizes the annular flow field energy of the rotating circular space at the position of the maximum diameter of the cage type wind wheel profile wall for working on the cage type wind wheel, thus improving the utilization ratio of wind energy; and secondly, the invention can smoothly start the rotor under a low wind speed condition,thus improving the agility thereof for capturing wind energy. The invention obtains high benefit at a low cost, and has good mechanical property, simple structure, low cost and competitive advantage;and the actual measurement shows that the utilization ratio of wind energy can be improved by 23 percent to 27 percent.

Description

Technical field: [0001] The invention relates to a wind power generation technology, in particular to a wind turbine rotor with short fins and Venturi tube effect. Background technique: [0002] It has been more than 100 years since Denmark built the first wind power station in 1890. Wind power has experienced several ups and downs. The central question is: Is it economically competitive? Only the winner survives. Therefore, how to improve the utilization efficiency of wind energy, reduce the start-up wind speed, develop and utilize low-speed wind energy for power generation, etc., is always an eternal topic in the wind turbine industry. Many scientific and technological workers have been making unremitting efforts to find problems and then solve them. In the inventor's patent application number 2008102113507, a wind turbine rotor system with Venturi tube effect is disclosed, which is essentially a Darrieus type (Darrieus type) composed of a plurality of bendable strip blad...

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Problems solved by technology

However, in subsequent studies and tests, the inventors found that there are deficiencies in it: first, the fluid mechanics test, especially the flow field smoke test, shows that the circle of revolution at the maximum diameter of the cage-shaped wind wheel profile wall There is an annular flow field in the ring space, which has high speed and dense energy, but it does not enter the cage-shaped wind wheel to do work, and it is wasted in vain; second, under low wind speed conditions, especially when the wind speed is lower than 2.5 m / s, Rotors are slow to start and lack agility, not ideal for catching gusts and breezes

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