The Experimental Research On The Hydraulic Characteristics Of The Pumping Station's Pressurized Forbay

As an inlet structure,the forbay is an important part of the pumping station.The pressurized forbay,close in top structure,is a kind of particular forbay in which water is pressurized.Based on the integral hydraulic model test of SHANGHAI CHANGQIAO waterwork's water-transport pumping station,some research on the hydraulic characteristics of the pressurized forbay has been done in the paper.The main content is listed as follows:l.The hydraulic characteristics of the pressurized forbay in different water supply combination and different pump unit combination without divertion measure,and the reason of the poor flow state.2.The hydraulic characteristics of the pressurized forbay with diversion pier,and the reason why the flow state can be improved.3.The experimental research on the critical air suction condition of the pressurized forbay. 4.Analysis and discusses on the pump's performance when air enters the pump.