Journal of South China University of Technology (Natural Science Edition) ›› 2007, Vol. 35 ›› Issue (6): 25-28.

• Power & Electrical Engineering • Previous Articles     Next Articles

Unsteady Jet Interference in a Rotating Bucket

Han Feng-qin  Xiao Ye-xiang  KubotaTakashi   

  1. School of Electric Power , South China Univ. of Tech. , Guangzhou 510640 , Guangdong , China
  • Received:2006-03-15 Online:2007-06-25 Published:2007-06-25
  • Contact: 韩凤琴(1951-)，女，博士，教授，博士生导师，主要从事流体机械数值仿真及水电站故障诊断研究. E-mail:ephanfq@scut. edu.cn
  • About author:韩凤琴(1951-)，女，博士，教授，博士生导师，主要从事流体机械数值仿真及水电站故障诊断研究.
  • Supported by:

    国家自然科学基金资助项目(50379015)

PDF

396

Abstract:

The discretization in time and space domains of the unsteady water flow in a rotating bucket of Pelton turbine is carried out using animated cartoon frames. Then , by applying Lagrangean approach to the movement calculation of the flow particles in each discrete frame , the unsteady water sheet flow in a rotating bucket is simulated. Moreover , by superimposing the result of flow analysis under the second jet on the one under the first jet , the jet interference in a bucket is numerically verified. Based on the comparison between the numerical prediction results of the jet interference in a bucket with the photograph of visual observation taken by the model test , it is finally confirmed that the water sheet flow interference is practically the same.

Key words: jet interference, rotating bucket, multi -nozzle, Pelton turbine, numerical simulation