A detailed study of tidal turbine power production and dynamic loading under grid generated turbulence and turbine wake operation
A detailed study of tidal turbine power production and dynamic loading under grid generated turbulence and turbine wake operation
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DOI：
10.1016/j.renene.2020.12.052
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发表时间：
2020-12
期刊：
影响因子：
8.7
通讯作者：
Matthew Allmark;R. Ellis;T. Ebdon;Catherine Lloyd;S. Ordoñez-Sanchez;R. Martinez;A. Mason-Jones;C. Johnstone;T. O’Doherty
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文献类型：
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作者：
Matthew Allmark;R. Ellis;T. Ebdon;Catherine Lloyd;S. Ordoñez-Sanchez;R. Martinez;A. Mason-Jones;C. Johnstone;T. O’Doherty
本文介绍了一项实验活动，其目的是为了促进目前的研究，考虑水平轴流水轮机在随机流动条件下的运行，即湍流和尾流诱导流动。该运动是在一个循环水槽内以大约1/20吨/小时的规模进行的。在五种不同的装置上进行了实验，产生了一个基线低湍流强度情况，两个高湍流情况和两个上游设备产生的尾迹情况。这些实验是在一系列不同的转子速度下进行的，这是一种新的方式，通过使用固定速度和固定制动力矩控制。为了对模型比例尺潮汐水轮机的随机水流条件进行统计量化，本文提出了对水流测量数据进行分析的方法。根据五种情况下产生的流动条件，记录了单叶的功率、推力、扭矩和叶根弯矩，并进行了分析。分析表明，很有可能利用上游涡轮机周围的加速区，从下游涡轮机获得略高的功率(增加6%)。最后发现，所采用的控制方案对不同转速下的功率和负载波动有显著影响。
The paper presents an experimental campaign developed to contribute to the current research considering the operation of Horizontal Axis Tidal Turbines within stochastic flow conditions, namely turbulent and wake induced flows. The campaign was conducted at approximately a 1/20 t h-scale within a recirculating flume. Experiments were conducted over five differing setups, yielding a baseline low Turbulence Intensity case, two high turbulence cases and two upstream device generated wake cases. The experiments were conducted at a range of differing rotor velocities established, in a novel way, by utilising both fixed speed and fixed braking torque control. The paper presents analysis of flow measurements to statistically quantify the stochastic flow conditions impinging on the model-scale tidal turbine. The power, thrust, torque and blade root bending moment of single blade were recorded and analysed against the flow conditions generated under the five cases. The analysis showed that it may well be possible to exploit the accelerated region around an upstream turbine to capture marginally higher power (6% increase) from downstream turbines. Lastly, it was found that the control scheme adopted has a significant impact on power and load fluctuations observed at differing rotor velocities.