Author(s): Wenming Liu; Yuan Zheng; Daqing Zhou; Xinfeng Ge; Jisong Yan
Linked Author(s): Yuan Zheng
Keywords: Pumping station; Numerical simulation; Hydraulic optimization; VOF; Symmetricboundary hypothesis
Abstract: A large water supply pumping station in east China has many characteristics, such as large discharge, high lift, and multi water outlet directions etc. This pumping station with 24 pumps is composed of penstock, transition passage, diversion channel, fore bay, suction sump, and pumps. Owing to the limited building site, suction sumps are set perpendicular to the flow in the penstock. Numerical simulation method was used to optimize hydraulically the structure of the pumping station. The results of the symmetric boundary hypothesis model are compared with those of the VOF model to reveal the fact that the main flow features are similar but some flow details differ between the two free surface models. Increasing the length of the pressure openings between diversion channel and fore bay and disposing diversion piers in the front of fore bay will help to reduce the bias flow induced by the inertia effect of water. Increasing the length of the suction sump is easier for water to flow from fore bay to bellmouth and has provided good flow conditions for pumps. The results of physical model test agree with those of numerical simulation. Fluent 6.2trade software has been used as the numerical simulation method.
Year: 2009