Shaping array design of marine current energy converters through scaled experimental analysis
Shaping array design of marine current energy converters through scaled experimental analysis
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DOI：
10.1016/j.energy.2013.07.023
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发表时间：
2013-09
期刊：
影响因子：
9
通讯作者：
A. Bahaj;L. Myers
中科院分区：
文献类型：
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作者：
A. Bahaj;L. Myers
海流能量转换器或潮汐涡轮机是一种新兴的可再生能源技术，可以提供可预测的电力供应。世界各地都在使用单个设备，期望部署农场或多个设备的阵列。我们提出了一项实验研究，其特征是在大型循环水通道中1/15比例涡轮机周围的下游尾流，以及一系列涉及1/120比例静态致动器盘的实验，这些实验允许模拟多个设备，我们的分析表明，近尾流是高度湍流的转子和支撑结构产生的结构。这一流动区域可能难以高精度地进行数值模拟。在远尾流中，静态致动器盘的性能可以与机械转子匹配，从而减小规模和成本，促进复杂阵列几何形状的复制。在这种情况下，环境湍流和设备/通道的几何特性驱动尾流恢复朝向自由流条件。在其他设备下游运行的设备将受到非稳态流场的影响，从而难以进行比较。我们讨论了阵列内设备规格和额定功率不相等的可能性（与风电场不同），提供了更有代表性的阵列性能衡量标准。
Marine current energy converters or tidal turbines represent an emerging renewable energy technology that can provide a predictable supply of electricity. Single devices are in operation around the world with aspirations to deploy farms or arrays of multiple devices.We present an experimental study that has characterised the downstream wake flow around a 1/15th-scale turbine in a large circulating water channel and a series of experiments involving static actuator disks at 1/120th-scale allowing simulation of multiple-device layouts.Our analysis demonstrates that the near wake is highly turbulent with structures generated by the rotor and support structure. This region of flow may prove difficult to numerically simulate with a high degree of accuracy. In the far wake the performance of static actuator disks can be matched to mechanical rotors reducing scale and cost facilitating replication of complex array geometries. Here the ambient turbulence and geometric properties of the device/channel drive the wake recovery towards free stream conditions.Devices operating downstream of others will be subject to a non-steady flow field making comparative performance difficult. We discuss the possibility of unequal device specification and rated power within an array (unlike wind farms) providing a more representative measure of array performance.