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Numerical prediction on the effect of free surface vortex on intake flow characteristics for tidal power station

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  • Ahn, Soo-Hwang
  • Xiao, Yexiang
  • Wang, Zhengwei
  • Zhou, Xuezhi
  • Luo, Yongyao

Abstract

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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  • Ahn, Soo-Hwang & Xiao, Yexiang & Wang, Zhengwei & Zhou, Xuezhi & Luo, Yongyao, 2017. "Numerical prediction on the effect of free surface vortex on intake flow characteristics for tidal power station," Renewable Energy, Elsevier, vol. 101(C), pages 617-628.
    • Handle: RePEc:eee:renene:v:101:y:2017:i:c:p:617-628
    DOI: 10.1016/j.renene.2016.09.021
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    References listed on IDEAS

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    Cited by:

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    4. Ahn, Soo-Hwang & Xiao, Yexiang & Wang, Zhengwei & Zhou, Xuezhi & Luo, Yongyao, 2017. "Performance prediction of a prototype tidal power turbine by using a suitable numerical model," Renewable Energy, Elsevier, vol. 113(C), pages 293-302.
    5. Li, Lin & Tan, Dapeng & Yin, Zichao & Wang, Tong & Fan, Xinghua & Wang, Ronghui, 2021. "Investigation on the multiphase vortex and its fluid-solid vibration characters for sustainability production," Renewable Energy, Elsevier, vol. 175(C), pages 887-909.
    6. Zi, Dan & Wang, Fujun & Wang, Chaoyue & Huang, Congbin & Shen, Lian, 2021. "Investigation on the air-core vortex in a vertical hydraulic intake system," Renewable Energy, Elsevier, vol. 177(C), pages 1333-1345.
    7. Huang, Xianbei & Yang, Wei & Li, Yaojun & Qiu, Baoyun & Guo, Qiang & Zhuqing, Liu, 2019. "Review on the sensitization of turbulence models to rotation/curvature and the application to rotating machinery," Applied Mathematics and Computation, Elsevier, vol. 341(C), pages 46-69.
    8. Cao, Jingwei & Luo, Yongyao & Presas, Alexandre & Ahn, Soo-Hwang & Wang, Zhengwei & Huang, Xingxing & Liu, Yan, 2022. "Influence of rotation on the modal characteristics of a bulb turbine unit rotor," Renewable Energy, Elsevier, vol. 187(C), pages 887-895.
    9. Ahn, Soo-Hwang & Zhou, Xuezhi & He, Lingyan & Luo, Yongyao & Wang, Zhengwei, 2020. "Numerical estimation of prototype hydraulic efficiency in a low head power station based on gross head conditions," Renewable Energy, Elsevier, vol. 153(C), pages 175-181.
    10. Linghua Kong & Jingwei Cao & Xiangyang Li & Xulei Zhou & Haihong Hu & Tao Wang & Shuxin Gui & Wenfa Lai & Zhongfeng Zhu & Zhengwei Wang & Yan Liu, 2022. "Numerical Analysis on the Hydraulic Thrust and Dynamic Response Characteristics of a Turbine Pump," Energies, MDPI, vol. 15(4), pages 1-15, February.
    11. Virgel M. Arocena & Binoe E. Abuan & Joseph Gerard T. Reyes & Paul L. Rodgers & Louis Angelo M. Danao, 2020. "Reduction of Entrained Vortices in Submersible Pump Suction Lines Using Numerical Simulations," Energies, MDPI, vol. 13(22), pages 1-20, November.
    12. Li, Huanhuan & Xu, Beibei & Riasi, Alireza & Szulc, Przemyslaw & Chen, Diyi & M'zoughi, Fares & Skjelbred, Hans Ivar & Kong, Jiehong & Tazraei, Pedram, 2019. "Performance evaluation in enabling safety for a hydropower generation system," Renewable Energy, Elsevier, vol. 143(C), pages 1628-1642.
    13. Zhang, Han & Gao, Xueping & Sun, Bowen & Qin, Zixue & Zhu, Hongtao, 2020. "Parameter analysis and performance optimization for the vertical pipe intake-outlet of a pumped hydro energy storage station," Renewable Energy, Elsevier, vol. 162(C), pages 1499-1518.
    14. Fu, Shifeng & Zheng, Yuan & Kan, Kan & Chen, Huixiang & Han, Xingxing & Liang, Xiaoling & Liu, Huiwen & Tian, Xiaoqing, 2020. "Numerical simulation and experimental study of transient characteristics in an axial flow pump during start-up," Renewable Energy, Elsevier, vol. 146(C), pages 1879-1887.
    15. Yaping Zhao & Jianjun Feng & Zhihua Li & Mengfan Dang & Xingqi Luo, 2022. "Analysis of Pressure Fluctuation of Tubular Turbine under Different Application Heads," Sustainability, MDPI, vol. 14(9), pages 1-17, April.
    16. Li, Lin & Li, Qihan & Ni, Yesha & Wang, Chengyan & Tan, Yunfeng & Tan, Dapeng, 2024. "Critical penetrating vibration evolution behaviors of the gas-liquid coupled vortex flow," Energy, Elsevier, vol. 292(C).
    17. Shi, Guangtai & Liu, Zongku & Xiao, Yexiang & Wang, Zhengwei & Luo, Yongyao & Luo, Kun, 2020. "Energy conversion characteristics of multiphase pump impeller analyzed based on blade load spectra," Renewable Energy, Elsevier, vol. 157(C), pages 9-23.
    18. Li, Zhixiang & Xu, Hui & Feng, Jiangang & Chen, Huixiang & Kan, Kan & Li, Tianyi & Shen, Lian, 2024. "Fluctuation characteristics induced by energetic coherent structures in air-core vortex: The most complex vortex in the tidal power station intake system," Energy, Elsevier, vol. 288(C).
    19. Kim, J.W. & Woo, S.-B., 2023. "A numerical approach to the treatment of submerged water exchange processes through the sluice gates of a tidal power plant," Renewable Energy, Elsevier, vol. 219(P1).

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