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The Scientific World Journal
Volume 2014, Article ID 241868, 11 pages
Research Article

Hydraulic Transients in the Long Diversion-Type Hydropower Station with a Complex Differential Surge Tank

1College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China
2College of Hydraulic and Civil Engineering, Xinjiang Agricultural University, Urumqi 830052, China

Received 11 April 2014; Accepted 17 June 2014; Published 15 July 2014

Academic Editor: Linni Jian

Copyright © 2014 Xiaodong Yu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Based on the theory of hydraulic transients and the method of characteristics (MOC), a mathematic model of the differential surge tank with pressure-reduction orifices (PROs) and overflow weirs for transient calculation is proposed. The numerical model of hydraulic transients is established using the data of a practical hydropower station; and the probable transients are simulated. The results show that successive load rejection is critical for calculating the maximum pressure in spiral case and the maximum rotating speed of runner when the bifurcated pipe is converging under the surge tank in a diversion-type hydropower station; the pressure difference between two sides of breast wall is large during transient conditions, and it would be more serious when simultaneous load rejections happen after load acceptance; the reasonable arrangement of PROs on breast wall can effectively decrease the pressure difference.