Experimental and numerical investigations of flow fields behind a small wind turbine with a flanged diffuser
Experimental and numerical investigations of flow fields behind a small wind turbine with a flanged diffuser
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DOI：
10.1016/j.jweia.2005.09.003
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发表时间：
2005-12-01
影响因子：
4.8
通讯作者：
Sato, K
中科院分区：
文献类型：
--
作者：
Abe, K;Nishida, M;Sato, K
对带法兰扩压器的小型风力涡轮机的流场进行了实验和数值研究。由于凸缘扩压器的作用，本风力涡轮机系统的功率系数高于贝茨极限（= 16/27）。为了阐明流动机制，使用热线技术测量了风力涡轮机后面的平均速度剖面。通过处理所获得的数据，流场的特征值进行了估计，并与裸露的风力涡轮机。此外，计算相应的实验条件进行评估的预测性能的模拟模型目前使用的，也调查流场更详细。目前的实验和数值计算结果提供了有用的信息后的流动机制与法兰扩压器的风力涡轮机。特别是在叶尖涡的破坏过程中，裸露的风力涡轮机和带法兰扩压器的风力涡轮机之间观察到了相当大的差异。(c)2005爱思唯尔有限公司保留所有权利。
Experimental and numerical investigations were carried out for flow fields of a small wind turbine with a flanged diffuser. The present wind-turbine system gave a power coefficient higher than the Betz limit (= 16/27) owing to the effect of the flanged diffuser. To elucidate the flow mechanism, mean velocity profiles behind a wind turbine were measured using a hot-wire technique. By processing the obtained data, characteristic values of the flow fields were estimated and compared with those for a bare wind turbine. In addition, computations corresponding to the experimental conditions were made to assess the predictive performance of the simulation model presently used and also to investigate the flow field in more detail. The present experimental and numerical results gave useful information about the flow mechanism behind a wind turbine with a flanged diffuser. In particular a considerable difference was seen in the destruction process of the tip vortex between the bare wind turbine and the wind turbine with a flanged diffuser. (c) 2005 Elsevier Ltd. All rights reserved.