title: Hydraulic transients in the long diversion-type hydropower station with a complex differential surge tank.
abstract: 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.
authors.affiliation: College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China.
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Yu
authors.affiliation: College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China ; College of Hydraulic and Civil Engineering, Xinjiang Agricultural University, Urumqi 830052, China.
authors.forename: Jian
authors.initials: J
authors.lastname: Zhang
authors.affiliation: College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China.
authors.forename: Ling
authors.identifier: 0000-0002-1750-6126
authors.initials: L
authors.lastname: Zhou
mesh_terms: D057446:Hydrodynamics; D008962:Models, Theoretical; D011210:Power Plants