IDEAS home Printed from https://ideas.repec.org/a/eee/energy/v265y2023ics0360544222032753.html
   My bibliography  Save this article

Evolution mechanism of water column separation in pump turbine: Model experiment and occurrence criterion

Author

Listed:
  • He, Xianghui
  • Yang, Jiandong
  • Yang, Jiebin
  • Zhao, Zhigao
  • Hu, Jinhong
  • Peng, Tao

Abstract

Whether the superposition of pressure pulsation and water hammer pressure caused by the fast closing of guide vanes causes water column separation in draft tube inlets is a hot topic in engineering and academic fields. It is also not known whether the bridging of water column separation endangers the operation of the units. This study uses a model pumped storage power station platform with two units to perform water column separation. Data on the pressure pulsation at different measurement points, discharges, and speeds are collected by an acquisition system, whereas the development process of water column separation is characterized by a high-speed camera. The measured pressure is decomposed into the water hammer pressure, which migrates with the unit operation point and pressure pulsation. The test results reveal that the pressure in the inlet section of the draft tube below the vaporization pressure that lasts for several seconds is a sufficient and necessary condition for water column separation to occur. The water hammer pressure has a significant influence on the water column separation, while low-frequency pressure pulsation has less influence. Water column separation is divided into four stages: starting, improvement, separation, and bridging. The main frequency of the pressure pulsation in the water column separation process is the frequency of the water hammer caused by load rejection and has a value of 0.47f/fn. Cavity bridging generates a frequency of 0.30f/fn. The flow-speed curve remains in the braking condition of turbine for 1.25 s. The separation and part of the bridging stage occur under the braking condition of turbine.

Suggested Citation

  • He, Xianghui & Yang, Jiandong & Yang, Jiebin & Zhao, Zhigao & Hu, Jinhong & Peng, Tao, 2023. "Evolution mechanism of water column separation in pump turbine: Model experiment and occurrence criterion," Energy, Elsevier, vol. 265(C).
    • Handle: RePEc:eee:energy:v:265:y:2023:i:c:s0360544222032753
    DOI: 10.1016/j.energy.2022.126389
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0360544222032753
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.energy.2022.126389?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    References listed on IDEAS

    as
    1. Zhang, Yuning & Liu, Kaihua & Xian, Haizhen & Du, Xiaoze, 2018. "A review of methods for vortex identification in hydroturbines," Renewable and Sustainable Energy Reviews, Elsevier, vol. 81(P1), pages 1269-1285.
    2. Zhao, Zhigao & Yang, Jiandong & Chung, C.Y. & Yang, Weijia & He, Xianghui & Chen, Man, 2021. "Performance enhancement of pumped storage units for system frequency support based on a novel small signal model," Energy, Elsevier, vol. 234(C).
    3. Yu, An & Wang, Yongshuai & Tang, Qinghong & Lv, Ruirui & Yang, Zhongpo, 2021. "Investigation of the vortex evolution and hydraulic excitation in a pump-turbine operating at different conditions," Renewable Energy, Elsevier, vol. 171(C), pages 462-478.
    4. Fu, Xiaolong & Li, Deyou & Wang, Hongjie & Zhang, Guanghui & Li, Zhenggui & Wei, Xianzhu, 2020. "Numerical simulation of the transient flow in a pump-turbine during load rejection process with special emphasis on hydraulic acoustic effect," Renewable Energy, Elsevier, vol. 155(C), pages 1127-1138.
    5. Zhao, Zhigao & Yang, Jiandong & Huang, Yifan & Yang, Weijia & Ma, Weichao & Hou, Liangyu & Chen, Man, 2021. "Improvement of regulation quality for hydro-dominated power system: quantifying oscillation characteristic and multi-objective optimization," Renewable Energy, Elsevier, vol. 168(C), pages 606-631.
    6. Zhang, Xiaoxi & Cheng, Yongguang & Yang, Zhiyan & Chen, Qiuhua & Liu, Demin, 2021. "Water column separation in pump-turbine after load rejection: 1D-3D coupled simulation of a model pumped-storage system," Renewable Energy, Elsevier, vol. 163(C), pages 685-697.
    7. Laouari, Ahmed & Ghenaiet, Adel, 2021. "Investigation of steady and unsteady cavitating flows through a small Francis turbine," Renewable Energy, Elsevier, vol. 172(C), pages 841-861.
    8. Zhang, Wenwu & Chen, Zhenmu & Zhu, Baoshan & Zhang, Fei, 2020. "Pressure fluctuation and flow instability in S-shaped region of a reversible pump-turbine," Renewable Energy, Elsevier, vol. 154(C), pages 826-840.
    9. Su, Wen-Tao & Binama, Maxime & Li, Yang & Zhao, Yue, 2020. "Study on the method of reducing the pressure fluctuation of hydraulic turbine by optimizing the draft tube pressure distribution," Renewable Energy, Elsevier, vol. 162(C), pages 550-560.
    10. Jiawei Ye & Wei Zeng & Zhigao Zhao & Jiebin Yang & Jiandong Yang, 2020. "Optimization of Pump Turbine Closing Operation to Minimize Water Hammer and Pulsating Pressures During Load Rejection," Energies, MDPI, vol. 13(4), pages 1-18, February.
    11. Jurasz, Jakub & Dąbek, Paweł B. & Kaźmierczak, Bartosz & Kies, Alexander & Wdowikowski, Marcin, 2018. "Large scale complementary solar and wind energy sources coupled with pumped-storage hydroelectricity for Lower Silesia (Poland)," Energy, Elsevier, vol. 161(C), pages 183-192.
    12. Yu, An & Zou, Zhipeng & Zhou, Daqing & Zheng, Yuan & Luo, Xianwu, 2020. "Investigation of the correlation mechanism between cavitation rope behavior and pressure fluctuations in a hydraulic turbine," Renewable Energy, Elsevier, vol. 147(P1), pages 1199-1208.
    13. Alvarez, Gonzalo E., 2020. "Operation of pumped storage hydropower plants through optimization for power systems," Energy, Elsevier, vol. 202(C).
    14. Goyal, Rahul & Gandhi, Bhupendra K., 2018. "Review of hydrodynamics instabilities in Francis turbine during off-design and transient operations," Renewable Energy, Elsevier, vol. 116(PA), pages 697-709.
    15. Cheng, Huan & Zhou, Lingjiu & Liang, Quanwei & Guan, Ziwu & Liu, Demin & Wang, Zhaoning & Kang, Wenzhe, 2020. "A method of evaluating the vortex rope strength in draft tube of Francis turbine," Renewable Energy, Elsevier, vol. 152(C), pages 770-780.
    16. Zhou, Xing & Shi, Changzheng & Miyagawa, Kazuyoshi & Wu, Hegao, 2021. "Effect of modified draft tube with inclined conical diffuser on flow instabilities in Francis turbine," Renewable Energy, Elsevier, vol. 172(C), pages 606-617.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Hu, Zanao & Cheng, Yongguang & Chen, Hongyu & Liu, Demin & Ji, Bin & Wang, Zhiyuan & Zhang, Pengcheng & Xue, Song, 2024. "Predicting pump-turbine characteristic curves by theoretical models based on runner geometry parameters," Energy, Elsevier, vol. 301(C).
    2. Lei, Shuaihao & Cheng, Li & Yang, Weixing & Xu, Wentao & Yu, Lei & Luo, Can & Jiao, Weixuan & Shen, Jiantao, 2024. "Dynamic multiscale pressure fluctuation features extraction of mixed-flow pump as turbine (PAT) and flow state recognition of the outlet passage using variational mode decomposition and refined compos," Energy, Elsevier, vol. 305(C).
    3. He, Xianghui & Hu, Jinhong & Zhao, Zhigao & Lin, Jie & Xiao, Pengfei & Yang, Jiandong & Yang, Jiebin, 2023. "Water column separation under one-after-another load rejection in pumped storage station," Energy, Elsevier, vol. 278(C).
    4. Ma, Weichao & Zhao, Zhigao & Yang, Jiebin & Lai, Xu & Liu, Chengpeng & Yang, Jiandong, 2024. "A transient analysis framework for hydropower generating systems under parameter uncertainty by integrating physics-based and data-driven models," Energy, Elsevier, vol. 297(C).
    5. Zhao, Zhigao & Chen, Fei & He, Xianghui & Lan, Pengfei & Chen, Diyi & Yin, Xiuxing & Yang, Jiandong, 2024. "A universal hydraulic-mechanical diagnostic framework based on feature extraction of abnormal on-field measurements: Application in micro pumped storage system," Applied Energy, Elsevier, vol. 357(C).

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Shiraghaee, Shahab & Sundström, Joel & Raisee, Mehrdad & Cervantes, Michel J., 2024. "Extending the operating range of axial turbines with the protrusion of radially adjustable flat plates: An experimental investigation," Renewable Energy, Elsevier, vol. 225(C).
    2. Zhou, Xing & Wu, Hegao & Cheng, Li & Huang, Quanshui & Shi, Changzheng, 2023. "A new draft tube shape optimisation methodology of introducing inclined conical diffuser in hydraulic turbine," Energy, Elsevier, vol. 265(C).
    3. Wang, Huan & Li, Wenfeng & Hou, Yaochun & Wu, Peng & Huang, Bin & Wu, Kelin & Wu, Dazhuan, 2023. "Recognition of the developing vortex rope in Francis turbine draft tube based on PSO-CS2," Renewable Energy, Elsevier, vol. 217(C).
    4. Pang, Shujiao & Zhu, Baoshan & Shen, Yunde & Chen, Zhenmu, 2024. "Study on suppression of cavitating vortex rope on pump-turbines by J-groove," Applied Energy, Elsevier, vol. 360(C).
    5. Sun, Longgang & Guo, Pengcheng & Yan, Jianguo, 2021. "Transient analysis of load rejection for a high-head Francis turbine based on structured overset mesh," Renewable Energy, Elsevier, vol. 171(C), pages 658-671.
    6. Hu, Jinhong & Yang, Jiebin & He, Xianghui & Zhao, Zhigao & Yang, Jiandong, 2023. "Transient analysis of a hydropower plant with a super-long headrace tunnel during load acceptance: Instability mechanism and measurement verification," Energy, Elsevier, vol. 263(PA).
    7. Lu, Xueding & Li, Chaoshun & Liu, Dong & Wang, He & Zhu, Zhiwei & Ta, Xiaoqiang & Xu, Rongli, 2024. "Correlating analysis and optimization between hydropower system parameters and multi-frequency oscillation characteristics," Energy, Elsevier, vol. 304(C).
    8. Kumar, Prashant & Singal, S.K. & Gohil, Pankaj P., 2024. "A technical review on combined effect of cavitation and silt erosion on Francis turbine," Renewable and Sustainable Energy Reviews, Elsevier, vol. 190(PB).
    9. Hu, Jinhong & Zhao, Zhigao & He, Xianghui & Zeng, Wei & Yang, Jiebin & Yang, Jiandong, 2023. "Design techniques for improving energy performance and S-shaped characteristics of a pump-turbine with splitter blades," Renewable Energy, Elsevier, vol. 212(C), pages 333-349.
    10. Yu, An & Li, Longwei & Ji, Jingjing & Tang, Qinghong, 2022. "Numerical study on the energy evaluation characteristics in a pump turbine based on the thermodynamic entropy theory," Renewable Energy, Elsevier, vol. 195(C), pages 766-779.
    11. Hu, Jinhong & Yang, Jiebin & He, Xianghui & Zeng, Wei & Zhao, Zhigao & Yang, Jiandong, 2023. "Transition of amplitude–frequency characteristic in rotor–stator interaction of a pump-turbine with splitter blades," Renewable Energy, Elsevier, vol. 205(C), pages 663-677.
    12. Wen-Tao Su & Wei Zhao & Maxime Binama & Yue Zhao & Jian-Ying Huang & Xue-Ren Chen, 2022. "Experimental Francis Turbine Cavitation Performances of a Hydro-Energy Plant," Sustainability, MDPI, vol. 14(6), pages 1-20, March.
    13. Nan Zhang & Xiaoming Xue & Na Sun & Yanhui Gu & Wei Jiang & Chaoshun Li, 2022. "Nonlinear Modeling and Stability of a Doubly-Fed Variable Speed Pumped Storage Power Station with Surge Tank Considering Nonlinear Pump Turbine Characteristics," Energies, MDPI, vol. 15(11), pages 1-24, June.
    14. Su, Wen-Tao & Binama, Maxime & Li, Yang & Zhao, Yue, 2020. "Study on the method of reducing the pressure fluctuation of hydraulic turbine by optimizing the draft tube pressure distribution," Renewable Energy, Elsevier, vol. 162(C), pages 550-560.
    15. Shahzer, Mohammad Abu & Kim, Jin-Hyuk, 2024. "Investigation of role of fins in a Francis turbine model's cavitation-induced instabilities under design and off-design conditions," Energy, Elsevier, vol. 292(C).
    16. He, Xianghui & Hu, Jinhong & Zhao, Zhigao & Lin, Jie & Xiao, Pengfei & Yang, Jiandong & Yang, Jiebin, 2023. "Water column separation under one-after-another load rejection in pumped storage station," Energy, Elsevier, vol. 278(C).
    17. Yang, Zhiyan & Cheng, Yongguang & Xia, Linsheng & Meng, Wanwan & Liu, Ke & Zhang, Xiaoxi, 2020. "Evolutions of flow patterns and pressure fluctuations in a prototype pump-turbine during the runaway transient process after pump-trip," Renewable Energy, Elsevier, vol. 152(C), pages 1149-1159.
    18. Salehi, Saeed & Nilsson, Håkan & Lillberg, Eric & Edh, Nicolas, 2021. "An in-depth numerical analysis of transient flow field in a Francis turbine during shutdown," Renewable Energy, Elsevier, vol. 179(C), pages 2322-2347.
    19. Wang, Wen-Quan & Yu, Zhi-Feng & Yan, Yan & Wei, Xin-Yu, 2024. "Numerical investigation on vortex characteristics in a low-head Francis turbine operating of adjustable-speed at part load conditions," Energy, Elsevier, vol. 302(C).
    20. Tao Guo & Lihui Xu & Wenquan Wang, 2021. "Influence of Upstream Disturbances on the Vortex Structure of Francis Turbine Based on the Criteria of Identification of Various Vortexes," Energies, MDPI, vol. 14(22), pages 1-21, November.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:energy:v:265:y:2023:i:c:s0360544222032753. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/energy .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.