一种提高Darrieus型海流能转换装置性能方法的研究

A Study on a Method to Improve the Hydrodynamic Performance of a Darrieus Marine Current Turbine

目前大多数海流能发电装置的设计可分为水平轴和垂直轴两类。起动性能差、能量利用率低是限制垂直轴海流能转换装直进行商业化应用的主要障碍。本文以Darricus型垂直轴海流能装置为例,通过数值模拟分析,对在其周边以一定角度添加竖直平板来提高其性能的方法进行了研究。结果表明这些平板可以在装置前方形成一个导流加速的通道,从而可以有效地提高这类装置的能量转换率。同时由于造价低廉,使这种方法在实际工程中具有很大的应用潜力。

Most marine current turbines currently under development can be divided into horizontal axis and vertical axis. A weak self-starting ability and low efficiency of energy conversion are the main obstacles on the way of a commercial application of vertical-axis marine current devices. In this paper, an approach is numerically investigated, which aims to improve the performance of vertical-axis marine current device through the installation of several straight plates around its periphery. The efficiency of a Darrieus-type marine current turbine with and without surrounding plates has been compared and the results indicate that these plates can form a narrow entrance in front of the device and effectively accelerate the water speed to increase the power output. Meanwhile due to its low cost, this approach has great potential to be applied to an actual project.