Numerical prediction on the effect of free surface vortex on intake flow characteristics for tidal power station
Numerical prediction on the effect of free surface vortex on intake flow characteristics for tidal power station
复制标题
自由面涡对潮汐电站进水流特性影响的数值预测
DOI：
10.1016/j.renene.2016.09.021
复制
发表时间：
2017-02
期刊：
影响因子：
8.7
通讯作者：
Luo Yongyao
中科院分区：
文献类型：
--
作者：
Ahn Soo-Hwang;Xiao Yexiang;Wang Zhengwei;Zhou Xuezhi;Luo Yongyao
对于潮汐电站，涡轮机在自由表面附近的低水头下运行。库岸和海岸水位变化较大，且取水渠道长度较短。在本文中，目的是调查的影响，表面涡的潮汐发电机组的运行条件。采用简化的油藏模型对两相流进行了数值模拟。数值方法与实验数据进行了验证。在水库模型中，预测的表面涡旋与各种分析模型一致。从数值结果来看，水库中的两相流包括表面涡，其对进口流的影响很大。强涡量和水中含气量的存在导致了管流的不均匀性。管道入口损失也直接影响操作条件。表面涡对管道净水头和流量的影响随水位的降低或水位差的增大呈指数增长。因此，预测原型的净水头和流量可能是复杂的现场试验，这也是很难准确预测原型性能的典型模型试验和数值模拟方法的潮汐发电机组。
For tidal power stations, the turbine operates under low-head near the free surface. The water levels change both the reservoir and sea sides, furthermore, the intake channel length is short. In this paper, the objective is to investigate the effect of surface vortices on operating conditions for tidal power units. Two-phase flows were simulated with a simplified reservoir model. The numerical method was verified with experimental data. In the reservoir model, the predicted surface vortex agreed well with various analytical models. From the numerical results, two-phase flows in the reservoir includes surface vortices sufficiently influenced the intake flows. It induces the non-uniformity of the pipe flow, which is by the strong vorticity and the air content in the water. The pipe entrance loss also directly influences operating conditions. Surface vortices influenced the net head and the flow rate passing through a pipe, and these effects increase exponentially as the water level decreases or the water level difference increases. Consequently, predicting the net head and the flow rate of the prototype could be complicated for site tests, and it would be also difficult to accurately predict prototype performances with the typical model test and numerical simulation methods for tidal power units.
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影响因子：
2.5
作者：
Hai-feng Li;Hongxun Chen;Zheng Ma;Yi Zhou
通讯作者：
Hai-feng Li;Hongxun Chen;Zheng Ma;Yi Zhou
BEM-CFD 与全转子几何模拟对海流涡轮机性能和流场的比较
影响因子：
8.7
作者：
Qiang Guo;Lingjiu Zhou;Zhengwei Wang
通讯作者：
Zhengwei Wang
DOI：
--
发表时间：
--
期刊：
--
影响因子：
--
作者：
W. Rankine
通讯作者：
W. Rankine
影响因子：
15.9
作者：
S. Dhakal;Ashesh Babu Timilsina;Rabin Dhakal;D. Fuyal;T. Bajracharya;H. Pandit;N. Amatya;A. M. Nakarmi
通讯作者：
S. Dhakal;Ashesh Babu Timilsina;Rabin Dhakal;D. Fuyal;T. Bajracharya;H. Pandit;N. Amatya;A. M. Nakarmi
DOI：
10.1080/19942060.2014.11015507
发表时间：
2014-01
影响因子：
6.1
作者：
A. Škerlavaj;L. Skerget;J. Ravnik;A. Lipej
通讯作者：
A. Škerlavaj;L. Skerget;J. Ravnik;A. Lipej