Small-scale vertical axis wind turbines are good candidates for urban area use where, due to various obstacles, the airflow is turbulent. In urban areas, air velocity is mostly low and site specific, so just in a few places, like tall buildings, there are suitable airflow situation in order to use turbine, so it is a good idea to install more than one turbine in such locations. On the other hand, acoustic noise that is emitted from turbines may bother people living in that area. In the current study, power performance of small-scale vertical axis wind turbines in a V-form array configuration is investigated using detached eddy simulation method. Also, Ffowcs Williams and Hawkings acoustic analogy formulation is conducted in order to predict the noise radiation level of turbines. Results showed that power performance of most of the turbines increased due to venturi effect that is made by low speed regions behind turbines. Acoustic noise analysis showed that there is a strong enhancement in sound pressure level in receivers compared with the isolated turbine.

中文翻译：

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一系列小型垂直轴风力涡轮机的性能和气动噪声预测

小型垂直轴风力涡轮机是市区使用的理想选择，由于各种障碍物，气流是湍流的。在城市地区，风速多为低风速，因地制宜，所以只有在少数地方，如高层建筑，有合适的气流情况才能使用涡轮机，所以在这些位置安装多台涡轮机是个好主意. 另一方面，涡轮机发出的噪音可能会打扰居住在该地区的人们。在当前的研究中，使用分离涡流模拟方法研究了 V 形阵列配置中小型垂直轴风力涡轮机的功率性能。此外，还进行了 Ffowcs Williams 和 Hawkings 声学类比公式，以预测涡轮机的噪声辐射水平。结果表明，由于涡轮机后面的低速区域产生的文丘里效应，大多数涡轮机的功率性能增加。声学噪声分析表明，与孤立的涡轮机相比，接收器中的声压级有很强的增强。