Experimental assessment of tidal turbine loading from irregular waves over a tidal cycle
Experimental assessment of tidal turbine loading from irregular waves over a tidal cycle
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潮汐周期中不规则波浪引起的潮汐涡轮机负载的实验评估
DOI：
10.1007/s40722-019-00136-9
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发表时间：
2019
影响因子：
1.9
通讯作者：
Draycott S
中科院分区：
文献类型：
--
作者：
Draycott S
波浪与潮汐通道中的水流相互作用，产生的波流环境在很大程度上决定了潮汐涡轮机所经历的负荷。在潮汐周期中，流速的大小和方向会发生变化，因此，涡轮机必须在波浪-电流的组合条件下运行。在这里，我们通过实验证明了这一效应，在与当前方向一致的1:15比例潮汐涡轮机模型上评估最终负载之前，在跟随（与波浪相同的方向）和相反的水流中产生了一个现实的不规则波浪情况。环境条件的巨大变化，以及涡轮机的性能和负荷，通过时间、光谱和统计输出的呈现来证明。实验结果表明，等效等效波高由零电流条件下的2.25 m变为3.2 m/s逆流和顺流条件下的6.11 m。在相反情况下，所测涡轮机参数的相应标准偏差范围为以下情况的215 - 260%，仅电流测量的340 - 565%。因此，当波浪出现时，在潮汐周期的一半时间内，会累积明显更大的疲劳损伤。然而，平均值似乎不受波浪存在的影响，这表明涡轮机的整体性能没有改变。这些结果表明，有必要了解波流联合环境，并对潮汐流涡轮机在顺流和反流条件下的运行进行测试和降低风险。对潮汐涡轮机在不规则波浪条件下所经历的载荷的性质获得了重要的额外见解，这是一种几乎没有记录的现象。
Waves interact with currents in tidal channels with the resulting wave–current environment largely determining the loads experienced by tidal stream turbines. Over a tidal cycle, the magnitude and direction of the current velocity changes and hence so does the combined wave–current conditions the turbines must operate within. Here we demonstrate this effect experimentally, generating a realistic irregular wave case in both following (in the same direction as the waves) and opposing currents prior to assessing the resulting loads on a fully instrumented 1:15 scale tidal turbine model aligned with the current direction. Large changes in the environmental conditions, along with the turbine performance and loads, are demonstrated through the presentation of temporal, spectral and statistical outputs. The experimental results demonstrate that the full-scale equivalent significant wave height changes from 2.25 m in zero current to 6.11 m in 3.2 m/s opposing current andinfollowing current. The corresponding standard deviations of measured turbine parameters for the opposing condition range between 215 and 260% of the following case, and between 340 and 565% of the current-only measurements. Hence, when waves are present, significantly greater fatigue damage will be accumulated during one-half of the tidal cycle. The mean values, however, appear to be unaffected by the presence of waves suggesting that the overall turbine performance is unaltered. These results demonstrate the requirement to understand the combined wave–current environment and to test and de-risk tidal stream turbines for operation in both following and opposing wave–current conditions. Significant additional insight is gained into the nature of loads experienced by tidal turbines in irregular wave conditions, a scarcely documented phenomenon.
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影响因子：
3.2
作者：
S. Ordoñez-Sanchez;Matthew Allmark;Kate Porter;R. Ellis;Catherine Lloyd;I. Santic;T. O’Doherty;C. Johnstone
通讯作者：
S. Ordoñez-Sanchez;Matthew Allmark;Kate Porter;R. Ellis;Catherine Lloyd;I. Santic;T. O’Doherty;C. Johnstone
深水波与海流之间的非线性相互作用
影响因子：
3.7
作者：
R. Moreira;D. Peregrine
通讯作者：
D. Peregrine
影响因子：
5
作者：
R. Martinez;G. Payne;T. Bruce
通讯作者：
R. Martinez;G. Payne;T. Bruce
使用高能流中的聚焦波群评估潮汐涡轮机的极端负载
影响因子：
8.7
作者：
Draycott S
通讯作者：
Draycott S
海流涡轮机中的波流相互作用
DOI：
10.1243/14750902jeme45
发表时间：
2006
期刊：
Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment
影响因子：
--
作者：
N. Barltrop;K. Varyani;A. Grant;D. Clelland;X. Pham
通讯作者：
X. Pham