小型水流能发电装置设计与仿真

Design and Simulation for Miniature Water Flow Generator

以达里厄型垂直轴式水流能发电装置为参考,设计适用于低水流速的发电装置。考虑到水流能发电装置在实际水域中的运行特点,以流体力学为理论基础,利用流体仿真软件Fluent对发电装置的翼型进行仿真分析和选型;选用MRF模型对水流能发电装置叶轮进行流场仿真分析,从能量捕获效率角度考虑,在发电装置的周围设置导流装置。研究结果表明,合适翼型的叶片能够明显提高发电效率;导流装置能够有效增加发电装置捕获水流动能的效率,发电装置能很好地满足设计要求。

A generator suitable for low flow velocity is designed in light of the Darrieus vertical-axis water flow generator. Based the operation characteristic of the Danieus vertical-axis water flow generator and fluid mechanics theory, a simulation is conducted to analysis and choose the suitable impeller for the water flow generator using Fluent. The moving reference frame （MRF） model is used to simulate the flow filed of the water around the impeller. For increasing the efficiency, a particular guiding device is set around the generator. The results show that a suitable impeller is helpful for increasing the efficiency of water flow generator. The guiding device can increase the velocity of the water around the impeller, and it increases the efficiency of water flow generator effectively. The desigued Darrieus vertical-axis water flow generator meets the design requirements well.