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如何更经济地提高风机的单机容量是风力发电的核心问题之一。本文根据流体力学的基本原理,研制了一种收缩喷管状的“风能密度增加装置”;使风吹到风机叶片之前在风速增加管中进行加速,从而增加风能密度。试验结果表明:出风口处风速是进风口的1.9倍,风能密度提高为6.9倍,总动能变为1.74倍。动能的增加量是由于进风口处的部分压力能转化为出风口处的动能。由于风机的单机容量与风能密度成正比,因此该装置可以成倍的提高风机的单机容量。
How to improve the stand-alone capacity of wind turbines more economically is one of the core issues of wind power generation. In this paper, according to the basic principles of fluid mechanics, a shrinking nozzle-like “wind energy density increasing device” is developed; wind speed is increased in the wind speed increasing tube before the wind blows to the wind turbine blade, thereby increasing the wind energy density. The test results show that: the outlet air velocity is 1.9 times the inlet, wind energy density increased 6.9 times, the total kinetic energy becomes 1.74 times. The increase in kinetic energy is due to the partial pressure at the inlet being able to translate into kinetic energy at the outlet. Since the fan unit capacity and wind energy is proportional to the unit, so the device can double the single fan capacity increase.