Research On The Hydraulic Characteristics Of The Side-Inlet Sump Of Urban Drainage Pumping Station

There are many units in an urban drainage pumping station where the flow usually varies from season. The side-inlet sump is often designed to save the area of the pumping station. The flow of every pump is inclined to be different in the same side-inlet sump and the poor flow pattern, and then the inlet condition of the pump is not good, which makes the efficiency of the pump drop and causes vibration etc. Based on the theses on the hydraulic characteristic of the Wenshui Road pumping station in the Third Period Shanghai Disposal Sewage project, the methods were discussed to improve the flow pattern of side-inlet sump, and the measures were put forward to ameliorate the flow pattern in the paper.Two kinds of technical approaches, the approach of the distribute-holes and the approach of the launder, were pointed to improve hydraulic characteristics of side-inlet sump in the paper. For each approach, a much more thorough study was made on the hydraulic characteristics of the side-inlet sump by the hydraulic model test and the numerical simulation. The conclusions from the paper were valuable in improving hydraulic characteristics of the urban drainage pumping station with side-inlet sump.