Equivalent pipe algorithm for metal spiral casing and its application in hydrau-lic transient computation based on equiangular spiral model
  • 万方数据
    水动力学研究与进展B辑 수동역학연구여진전B집
    JOURNAL OF HYDRODYNAMICS
    2014年 1期 137-143 ,共7页

    彭小东%杨朝晖%刘善均%鞠小明

    팽소동%양조휘%류선균%국소명



    equiangular spiral%metal spiral casing%equivalent pipe%hydraulic transient


    For the metal spiral casing of water turbines, a new equivalent pipe algorithm is developed based on the idea of equiangu-lar spiral. Prototype tests and computations are carried out to investigate the hydraulic transient characteristics. The computation re-sults by using the new model are in a good agreement with the prototype test data with respect to the maximum speed of the tur-bine-generator unit, the maximum water hammer pressure in the spiral casing and the maximum vacuum in the draft tube. The propo-sed method is a significant improvement over the conventional algorithm with the accuracy increased and the error reduced by about 3%.
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