IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v12y2019i15p2893-d252195.html

Investigation on the Impact of Air Admission in a Prototype Francis Turbine at Low-Load Operation

Author

Listed:
  • Julian Unterluggauer

    (Institute for Energy Systems and Thermodynamics/E302, TU Wien, Getreidemarkt 9/BA, 1060 Vienna, Austria)

  • Anton Maly

    (Institute for Energy Systems and Thermodynamics/E302, TU Wien, Getreidemarkt 9/BA, 1060 Vienna, Austria)

  • Eduard Doujak

    (Institute for Energy Systems and Thermodynamics/E302, TU Wien, Getreidemarkt 9/BA, 1060 Vienna, Austria)

Abstract

Due to significant changes in the energy system, hydraulic turbines are required to operate over a wide power range. In particular, older turbines which are not designed for these environments will suffer under off-design conditions. In order to evaluate whether or not such a turbine could fulfill the new requirements of the energy market, a study about the behavior of a prototype plant in low-load operation is presented. Therefore, prototype site measurements are performed to determine the most damaging operating point by means of acceleration sensors and pressure transducers. Moreover, unsteady computational fluid dynamics (CFD) simulations considering two-phase flow and two hybrid turbulence models are used to analyze the flow conditions inside the turbine. The resulting pressure pulsations are mapped onto the runner blade to obtain stress and further calculate damage factors. Accordingly, the stresses are compared to those obtained by the strain gauge measurement. Moreover, the influence of active flow control by means of air injection on plant behavior and runner lifetime is discussed as well.

Suggested Citation

  • Julian Unterluggauer & Anton Maly & Eduard Doujak, 2019. "Investigation on the Impact of Air Admission in a Prototype Francis Turbine at Low-Load Operation," Energies, MDPI, vol. 12(15), pages 1-19, July.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:15:p:2893-:d:252195
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/12/15/2893/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1996-1073/12/15/2893/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Zhang, Yuning & Zheng, Xianghao & Li, Jinwei & Du, Xiaoze, 2019. "Experimental study on the vibrational performance and its physical origins of a prototype reversible pump turbine in the pumped hydro energy storage power station," Renewable Energy, Elsevier, vol. 130(C), pages 667-676.
    2. 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.
    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. Eduard Doujak & Anton Maly & Julian Unterluggauer & Franz Haller & Michael Maier & Christian Blasbichler & Simon Stadler, 2023. "Fatigue Strength Analysis of a Prototype Francis Turbine in a Multilevel Lifetime Assessment Procedure Part III: Instrumentation and Prototype Site Measurement," Energies, MDPI, vol. 16(16), pages 1-39, August.
    2. Raul-Alexandru Szakal & Alexandru Doman & Sebastian Muntean, 2021. "Influence of the Reshaped Elbow on the Unsteady Pressure Field in a Simplified Geometry of the Draft Tube," Energies, MDPI, vol. 14(5), pages 1-21, March.
    3. Sergey Shtork & Daniil Suslov & Sergey Skripkin & Ivan Litvinov & Evgeny Gorelikov, 2023. "An Overview of Active Control Techniques for Vortex Rope Mitigation in Hydraulic Turbines," Energies, MDPI, vol. 16(13), pages 1-31, July.
    4. Muhirwa, Alexis & Cai, Wei-Hua & Su, Wen-Tao & Liu, Quanzhong & Binama, Maxime & Li, Biao & Wu, Jian, 2020. "A review on remedial attempts to counteract the power generation compromise from draft tubes of hydropower plants," Renewable Energy, Elsevier, vol. 150(C), pages 743-764.
    5. Unterluggauer, Julian & Sulzgruber, Verena & Doujak, Eduard & Bauer, Christian, 2020. "Experimental and numerical study of a prototype Francis turbine startup," Renewable Energy, Elsevier, vol. 157(C), pages 1212-1221.
    6. Sun, Longgang & Xu, Hongyang & Li, Chenxi & Guo, Pengcheng & Xu, Zhuofei, 2024. "Unsteady assessment and alleviation of inter-blade vortex in Francis turbine," Applied Energy, Elsevier, vol. 358(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. Kan, Kan & Yu, Yunkuan & Zhou, Yuguo & Chen, Yu & Ye, Changliang, 2025. "Numerical investigation of multiscale flow-induced vibration and fatigue life prediction of a large Francis turbine," Energy, Elsevier, vol. 335(C).
    2. Chen, Sheng & Wang, Jing & Zhang, Jian & Yu, Xiaodong & He, Wei, 2020. "Transient behavior of two-stage load rejection for multiple units system in pumped storage plants," Renewable Energy, Elsevier, vol. 160(C), pages 1012-1022.
    3. Sergey Skripkin & Daniil Suslov & Ivan Plokhikh & Mikhail Tsoy & Evgeny Gorelikov & Ivan Litvinov, 2023. "Data-Driven Prediction of Unsteady Vortex Phenomena in a Conical Diffuser," Energies, MDPI, vol. 16(5), pages 1-20, February.
    4. Borkowski, Dariusz & Węgiel, Michał & Ocłoń, Paweł & Węgiel, Tomasz, 2019. "CFD model and experimental verification of water turbine integrated with electrical generator," Energy, Elsevier, vol. 185(C), pages 875-883.
    5. 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).
    6. Alerci, A.L. & Vagnoni, E. & Paolone, M., 2023. "Structural impact of the start-up sequence on Pelton turbines lifetime: Analytical prediction and polynomial optimization," Renewable Energy, Elsevier, vol. 218(C).
    7. Hong, Sheng & Wu, Yuping & Wu, Jianhua & Zhang, Yuquan & Zheng, Yuan & Li, Jiahui & Lin, Jinran, 2021. "Microstructure and cavitation erosion behavior of HVOF sprayed ceramic-metal composite coatings for application in hydro-turbines," Renewable Energy, Elsevier, vol. 164(C), pages 1089-1099.
    8. Li, Yanyan & Sun, Longgang & Guo, Pengcheng, 2024. "Investigation of the transient characteristics of the Francis turbine during runaway process," Renewable Energy, Elsevier, vol. 237(PC).
    9. K., Subramanya & Chelliah, Thanga Raj, 2023. "Capability of synchronous and asynchronous hydropower generating systems: A comprehensive study," Renewable and Sustainable Energy Reviews, Elsevier, vol. 188(C).
    10. Tesfay, Asfafaw Haileselassie & Lia, Leif & Vereide, Kaspar, 2025. "Composite surge tanks to boost hydropower flexibility," Renewable Energy, Elsevier, vol. 251(C).
    11. Liu, Ming & Tan, Lei & Cao, Shuliang, 2019. "Dynamic mode decomposition of gas-liquid flow in a rotodynamic multiphase pump," Renewable Energy, Elsevier, vol. 139(C), pages 1159-1175.
    12. Pei, Ji & Shen, Jiawei & Wang, Wenjie & Yuan, Shouqi & Zhao, Jiantao, 2024. "Evaluating hydraulic dissipation in a reversible mixed-flow pump for micro-pumped hydro storage based on entropy production theory," Renewable Energy, Elsevier, vol. 225(C).
    13. Binama, Maxime & Su, Wen-Tao & Cai, Wei-Hua & Li, Xiao-Bin & Muhirwa, Alexis & Li, Biao & Bisengimana, Emmanuel, 2019. "Blade trailing edge position influencing pump as turbine (PAT) pressure field under part-load conditions," Renewable Energy, Elsevier, vol. 136(C), pages 33-47.
    14. 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).
    15. Tian, Yuqiang & Wang, Bin & Chen, Peng & Yang, Ying, 2021. "Finite-time Takagi–Sugeno fuzzy controller design for hydraulic turbine governing systems with mechanical time delays," Renewable Energy, Elsevier, vol. 173(C), pages 614-624.
    16. Salehi, Saeed & Nilsson, Håkan, 2022. "Effects of uncertainties in positioning of PIV plane on validation of CFD results of a high-head Francis turbine model," Renewable Energy, Elsevier, vol. 193(C), pages 57-75.
    17. 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.
    18. Alharbi, Talal & Abo-Elyousr, Farag K. & Abdelshafy, Alaaeldin M., 2024. "Efficient Coordination of Renewable Energy Resources through Optimal Reversible Pumped Hydro-Storage Integration for Autonomous Microgrid Economic Operation," Energy, Elsevier, vol. 304(C).
    19. Su, Wen-Tao & Li, Xiao-Bin & Xia, Yu-Xing & Liu, Quan-Zhong & Binama, Maxime & Zhang, Ya-Ning, 2021. "Pressure fluctuation characteristics of a model pump-turbine during runaway transient," Renewable Energy, Elsevier, vol. 163(C), pages 517-529.
    20. Krzemianowski, Zbigniew & Steller, Janusz & Janicki, Waldemar & Góralczyk, Adam, 2025. "Cavitation and runaway experimental research of a very high specific speed low-head model Francis turbine – A case study with emphasis on flow analysis in the draft tube," Energy, Elsevier, vol. 337(C).

    More about this item

    Keywords

    ;
    ;
    ;
    ;

    Statistics

    Access and download statistics

    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:gam:jeners:v:12:y:2019:i:15:p:2893-:d:252195. 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: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    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.