Blade loading on tidal turbines for uniform unsteady flow
Blade loading on tidal turbines for uniform unsteady flow
复制标题
潮汐涡轮机上的叶片负载可实现均匀的非定常流动
DOI：
10.1016/j.renene.2014.12.028
复制
发表时间：
2015
期刊：
影响因子：
8.7
通讯作者：
Milne I
中科院分区：
文献类型：
--
作者：
Milne I
潮汐涡轮机叶片上的非定常水动力载荷的改进表征对于更可靠地预测其疲劳寿命和避免过早失效是必要的。为此，本文提出了一套叶片根部弯矩响应的比例模型潮汐涡轮机受到非定常平面强迫在拖曳水池。在边界层被认为附着在叶片外截面的情况下，非定常流的面外弯矩幅值比定常流中测得的相应载荷大15%，并显示出高达4.5°的相位超前。这两个观测结果定性上与动力入流和非环流强迫的影响一致。弯矩响应的强迫时间的历史，包括多个频率，以及离散的半正弦扰动，能够重建合理以及使用从单频振荡流得到的响应。这表明叶片设计者可以利用相对较低的保真度技术，并进行可能更少的实验测试来获得疲劳载荷谱。
An improved characterisation of the unsteady hydrodynamic loads on tidal turbine blades is necessary to enable more reliable predictions of their fatigue life and to avoid premature failures. To this end, this paper presents a set of blade-root bending moment responses for a scale-model tidal turbine subjected to an unsteady planar forcing in a towing tank. In cases where the boundary layer was believed to be attached to the outer sections of the blade, the out-of-plane bending moment amplitude for unsteady flow was up to 15% greater than the corresponding load measured in steady flow and exhibited a phase-lead of up to 4.5°. Both these observations are qualitatively consistent with the effects of dynamic inflow and non-circulatory forcing. The bending moment responses for a forcing time history that comprised multiple frequencies, as well as for a discrete half-sinusoidal perturbation, were able to be reconstructed reasonably well using the responses obtained from single-frequency oscillatory flows. This suggests that blade designers could utilise relatively low fidelity techniques and conduct potentially fewer experimental tests to acquire the fatigue load spectrum.
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随机海流载荷下复合材料涡轮叶片的静力和疲劳分析
影响因子：
0.8
作者：
Fang;H. Mahfuz;G. Alsenas;H. Hanson
通讯作者：
H. Hanson
影响因子：
5
作者：
I. Milne;A. Day;Rajnish N. Sharma;R. Flay
通讯作者：
I. Milne;A. Day;Rajnish N. Sharma;R. Flay
影响因子：
8.7
作者：
M. Anyi;B. Kirke;Sam A. M. Ali
通讯作者：
M. Anyi;B. Kirke;Sam A. M. Ali
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