An improved horizontal axis wind turbine and its use method and design method

Abstract

The invention discloses an improved type horizontal axis wind power generator and a using method and designing method thereof. Mainly, a device for increasing power generating amount of a wind turbine, and a mixed type designing method with an immersion boundary method and an actuating theory coupled. Along with large scale development of wind turbines, the power loss nearby blade roots of a windwheel becomes more and more obvious, by designing a flow guiding disk device capable of moving forwards and backwards and being separated and combined, the flow field nearby the blade roots of the wind wheel is changed, and the effect of improving the power generating power of the wind turbine is achieved; the key design problem is about the pneumatic shape and the size of the device, if an engineering method is adopted, the defect that precision is low exists, if a traditional computational fluid dynamics method is adopted, the calculating amount is large, thus, according to the design of thedevice, a value simulating method where the immersion boundary method is mixed with the actuating theory is put forwards, and the calculating efficiency can be greatly improved while the simulating calculation precision of values is guaranteed.

Description

technical field [0001] The invention belongs to the field of wind turbines, and in particular relates to an improved horizontal axis wind turbine, its use method and design method. Background technique [0002] With the large-scale development of horizontal axis wind turbines, the area of ​​the blade root is getting larger and larger. In order to meet the structural strength requirements of the blade root, the blades are basically in a nearly cylindrical shape, resulting in low wind energy utilization. Therefore, the power generation of the entire wind turbine will be reduced. . Aiming at the research on the devices for increasing the power generation of horizontal axis wind turbines, domestic and foreign scholars have carried out a lot of research work on them, such as variable leading edge devices, variable trailing edge devices, vortex generator devices, and blade tip winglet devices on the blades. Wait. These devices all need to modify the blades, which weakens the str...

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Problems solved by technology

The matching design method, the engineering application mainly adopts the leaf element momentum theory method, which has the characteristics of fast calculation speed but low design accuracy; at the same time, due to the problems of large calculation amount and low calculation efficiency of the traditional computational fluid dynamics method, only verification and mechanism Research, it is difficult to apply in engineering design, especially when it comes to aerodynamic shape optimization design

The most important thing is that the engineering method of blade element momentum theory cannot realize the design of the present invention, and the traditional CFD method has low calculation efficiency

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