往复流作用下潮流能水轮机单桩基础冲刷试验

为研究往复流作用下潮流能水轮机单桩基础局部冲刷演变机制,在水槽中开展物理模型试验,探讨了水流强度对潮流能水轮机单桩基础冲刷过程的影响规律,并与仅单桩工况进行了对比.试验结果表明:往复流作用下,潮流能水轮机单桩基础冲刷过程具有显著的周期性震荡、逐步提高的特点;叶轮的存在加快了基础冲刷过程,增加了最大冲刷深度;最大冲刷深度...

Experimental study on scour process around mono-pile foundation of a tidal stream turbine under bidirectional flow

In order to investigate the evolution mechanism of scour process around the mono-pile foundation of a tidal stream turbine, a series of physical tests in a flume were conducted. The influence mechanism of flow intensity were studied and the results were compared with that induced by a single mono-pile. The experimental results reveal that the scour process around the mono-pile foundation of a tidal stream turbine gradually develops with a periodic fluctuation. The presence of the rotor is found to accelerate the scour process and deepen the maximum scour depth. Meanwhile, the maximum scour depth increases linearly with the increasing flow intensity and the fluctuation amplitude also increases with the increase of flow intensity. Compared to the directional flow, the bidirectional flow reduces the scour depth around the mono-pile foundation of a tidal stream turbine. However, their difference gradually decreases with the increase of flow intensity.