Generation Mechanism of the Impulsive Pressure Rise during Start-up on Blade at High Head Low Specific Speed Francis Turbine

DOI

Bibliographic Information

Other Title
  • 高落差低比速度フランシス水車の起動過程においてランナ羽根に生じる衝撃的な水圧荷重の発生メカニズム

Description

<p>Extraordinary stress on runner blade during start-up at the low specific speed Francis turbine cause severe damage to the blades. To make clear the mechanism of the extraordinary stress, CFD analysis in addition to the measurement of the model and the prototype turbine was carried out. By the analysis of the model and the prototype turbine, it became clear that the phenomenon is commonly arisen as the transient hydraulic behavior, and the impact load causing extraordinary stress on runner blades is related to the impulsive pressure rise. From a comparison of CFD and model test result, it is concluded that the impulsive pressure rise was caused by the result of chain-reaction of the cavitation cloud in the runner passage.</p>

Journal

  • Turbomachinery

    Turbomachinery 51 (4), 220-228, 2023

    Turbomachinery Society of Japan

Keywords

Details 詳細情報について

  • CRID
    1390298200989716480
  • DOI
    10.11458/tsj.51.4_220
  • ISSN
    18802338
    03858839
  • Text Lang
    ja
  • Data Source
    • JaLC
  • Abstract License Flag
    Disallowed

Report a problem

Back to top