Comparison of BEM-CFD and full rotor geometry simulations for the performance and flow field of a marine current turbine
Comparison of BEM-CFD and full rotor geometry simulations for the performance and flow field of a marine current turbine
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BEM-CFD 与全转子几何模拟对海流涡轮机性能和流场的比较
DOI：
10.1016/j.renene.2014.10.047
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发表时间：
2015-03
期刊：
影响因子：
8.7
通讯作者：
Zhengwei Wang
中科院分区：
文献类型：
--
作者：
Qiang Guo;Lingjiu Zhou;Zhengwei Wang
最近的研究将计算流体力学(CFD)软件中的叶片单元动量(BEM)理论与雷诺平均的N-S方程相结合，因为用BEM-CFD方法分析海流涡轮内的流动需要的计算资源要少得多。通过分析孤立水平轴海流涡轮的性能和流场特性，并与全转子几何模拟和实验数据进行比较，评价了边界元-CFD计算的准确性。比较表明，全转子几何模拟在最佳工况(TSR=0.5-7)附近给出了较好的预测结果，但对非设计工况的精度较低。用实验和数值升阻系数对基于二维水翼理论的边界元-CFD计算结果进行了评价。结果表明，二维升力系数和阻力系数对边界元-CFD数值模拟结果有显著影响。总体而言，基于数值水翼数据的边界元-CFD可以准确地预测推力，但总体上高估了推力。升力和阻力项对边界元-CFD计算结果的影响表明，为了提高边界元-CFD计算的精度，应考虑更合理的水翼二维计算和三维效应。BEM-CFD方法能较好地反映最优状态(TSR=6.6时)旋翼附近的周向平均速度特性，并能获得对称的尾迹特征，但由于受BEM-CFD方法的限制，不能预测叶片数有限所引起的详细流动特性。
Recent studies have coupled blade element momentum (BEM) theory with the Reynolds Averaged Navier–Stokes equations in computational fluid dynamics (CFD) software, as the BEM-CFD method to analyse the flows in marine current turbines is with much less computational resources. The accuracy of the BEM-CFD calculation was evaluated by analysing the performance and flow field characteristics of an isolated horizontal axis marine current turbine with comparisons to a full rotor geometry simulation and experimental data. The comparisons show that the full rotor geometry simulation gives good predictions near the optimal conditions (TSR = 5–7), but is less accurate for off-design conditions. The BEM-CFD results, which are based on two-dimensional hydrofoil theory, are evaluated using the experimental and numerical lift and drag coefficients. It shows that the two-dimensional lift and drag coefficients had significant effects on the BEM-CFD predictions. Overall, the BEM-CFD based on the numerical hydrofoil data can accurately predict the thrust, but generally overestimates the power. The influence of the lift and drag terms on the BEM-CFD predictions suggest that more reasonable 2D predictions for hydrofoils and the 3D effects should be considered to improve the BEM-CFD accuracy. BEM-CFD can reasonably reflect the circumferential averaged velocity characteristics near the rotor for the optimal condition (TSR = 6) and gets symmetrical features in the wake, but it cannot predict the detailed flow features caused by the finite number of blades due to the limitations of the BEM-CFD method.
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影响因子：
8.7
作者：
Guanghui Bai;Jun Li;Pengfei Fan;Guojun Li
通讯作者：
Guanghui Bai;Jun Li;Pengfei Fan;Guojun Li
DOI：
10.1109/oceans.2010.5664564
发表时间：
2010-12
期刊：
OCEANS 2010 MTS/IEEE SEATTLE
影响因子：
--
作者：
M. Harrison;W. Batten;A. Bahaj
通讯作者：
M. Harrison;W. Batten;A. Bahaj
DOI：
10.1098/rsta.2012.0293
发表时间：
2013-02
期刊：
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
影响因子：
--
作者：
W. Batten;M. Harrison;A. Bahaj
通讯作者：
W. Batten;M. Harrison;A. Bahaj
影响因子：
3.2
作者：
T. Y. Chen;L. Liou
通讯作者：
T. Y. Chen;L. Liou
DOI：
10.5860/choice.49-2091
发表时间：
2001-11
期刊：
--
影响因子：
--
作者：
T. Burton;D. Sharpe;E. Bossanyi;N. Jenkins
通讯作者：
T. Burton;D. Sharpe;E. Bossanyi;N. Jenkins