Journal of South China University of Technology (Natural Science Edition) ›› 2005, Vol. 33 ›› Issue (8): 20-22,44.

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Cascade Flow W ithin Guiding Device of Francis Turbine

Han Feng-qin  Huang Ji-ye  Fan Chun-xue  Kubota Takashi   

  1. College of Electric Power,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China
  • Received:2004-10-19 Online:2005-08-25 Published:2005-08-25
  • Contact: 韩凤琴(1951-)，女，教授，博士生导师，主要从事数字流体机械及智能技术研究 E-mail:ephanfq@scut.edu.cn
  • About author:韩凤琴(1951-)，女，教授，博士生导师，主要从事数字流体机械及智能技术研究
  • Supported by:

    国家自然科学基金资助项目(50379015)

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Abstract:

This paper expounds using the Computational Fluid Dynamics(CFD)method to study the variations of perform an ce of cascade flow within the guiding device of francis turbine.Th e variations of the flow field,the pres-sure field,the energy field and the energy loss in multi-operating conditions are investigated.It is found that the computational result accords with the experimental results.This research shows that the variations of flow field with-in cascade directly affects the runner inflow conditions and the stability of turbine operation.Th e numerical analy-zing results lay a technical basis f0r the optimum design and the stable operation of turbines.

Key words: francis turbine, cascade, multi-operating condition, Computational Fluid Dynamics, perform ance