Study on Pump-starting Water Hammer of Long-distance Water Supply Project with Multiple Pumping Stations
WANG Zemin
YU Haizhong
LANG Huawei
LIU Yuan
Abstract：The water hammer caused by pump-starting is an important factor affecting the safety of long-distance water supply projects.For the water supply project with multiple pumping stations,the sudden pressure rise generated when the pump is started will affect other pumping stations,and serious accidents may occur due to improper protection.Based on the basic theory of pressure transient flow,the hydraulic simulation model under different pump starting conditions was constructed.Combined with the existing hammer protection measures in an actual project,the water hammer was simulated by characteristic line method.The starting mode of each pump station was started successively at an interval of 30s,and the valve behind the pump adopted a one-stage mode with 0～1 opening degree for 30s.Under three working conditions of different unit flow,pump head and pipeline layout conditions,the pump starting simulation calculation was carried out respectively.The results showed that the water hammer pressure could meet the design protection standard under the three working conditions.
Keywords：long distance water supply projectmultiple pumping stationspump-starting water hammernumerical simulation
Publication Date：2025-04-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 96-99,104 )