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- W2379593581 abstract "When pump system operates in a free outflow mode,the level of the outlet cross-section piezometer during the hydraulic transient process is different from the level that basically invariable during the operation mode of submerged discharge.Taking the outlet section as a special hydraulic element,the hydraulic transient process under the free outflow mode of pump system is calculated herein with the method of characteristics.For a same pump,it is known from the calculation made on the water hammer during the accident shutdown of pump that if compared with the submerged discharge,the flow pressure of the pipeline can be increased by the free outflow mode,which is favorable for the water hammer protection.Under the operation mode of free outflow,flap valve or air-inlet valve are not necessary to be installed in pump system.However,more energy will be lost by the free outflow mode,if compared with that of the submerged discharge mode.From the aspects of both the water hammer protection and the maintenance of pumping station,the free outflow mode will be a better operation scheme,when the changing amplitude of the water level in the outlet sump of pumping station is less and the annual operation period is short." @default.
- W2379593581 created "2016-06-24" @default.
- W2379593581 creator A5034004697 @default.
- W2379593581 date "2011-01-01" @default.
- W2379593581 modified "2023-09-23" @default.
- W2379593581 title "Calculation and analysis on water hammer under different outflow modes of pump system" @default.
- W2379593581 hasPublicationYear "2011" @default.
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