Study on Performance Improvement of Cross-Flow Wind Turbine with Symmetrical Casing
Study on Performance Improvement of Cross-Flow Wind Turbine with Symmetrical Casing
复制标题
对称机壳横流式风力发电机性能改进研究
DOI：
10.1299/jee.4.490
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
Y. Takeyama
中科院分区：
文献类型：
--
作者：
T. Shigemitsu;J. Fukutomi;Y. Takeyama
横流风力机在低速比下具有较高的扭矩系数。因此，它是用作自启动涡轮机的一个很好的候选者。此外，它还具有低噪声和良好的稳定性，因此，它作为城市地区的小型风力发电机组的应用受到了关注。然而，与其他小型风力涡轮机相比，它的最大功率系数极低(10%)。为了改善横流转子的性能和流动状况，提出了带有喷嘴和扩散器的对称叶型，并对两种对称叶型进行了实验研究。对于机匣2和机匣1，功率系数的最大值分别为Cpmax=0.17和0.098。在此基础上，阐明了对称壳体横流风力机的性能和内部流态。在分析结果的基础上，讨论了对称缸体对涡轮性能的影响。
A cross-flow wind turbine has a high torque coefficient at a low tip speed ratio. Therefore, it is a good candidate for use as a self-starting turbine. Furthermore, it has low noise and excellent stability; therefore, it has attracted attention from the viewpoint of applications as a small wind turbine for an urban district. However, its maximum power coefficient is extremely low (10 %) as compared to that of other small wind turbines. In order to improve the performance and the flow condition of the cross-flow rotor, symmetrical casings with a nozzle and a diffuser are proposed and experimental research with two types of symmetrical casings is conducted. The maximum power coefficient is obtained as Cpmax = 0.17 for casing 2 and Cpmax=0.098 for casing 1. In the present study, power characteristics of the cross-flow rotor and those of the symmetrical casings with the nozzle and the diffuser are investigated. Then, the performance and internal flow patterns of the cross-flow wind turbine with the symmetrical casings are clarified. After that, the effect of the symmetrical casings on the performance of the turbine is discussed on the basis of the analysis results.