Numerical Simulation For Flow Pattern And Hydraulic Performance Of Pumping Systems

It is important to improve the running performance of pump stations, which is consuming large energy. Based on the background for construction of the East Route Project of the South-to-North Water Transfers, this paper systemically studied on passage which influents the hydraulic performance, adopting three-turbulence numerical simulation technique and experimentation. The research work indicates the characteristic of flow, property predication for pumping system and design principle.An optimize function is put forward based on outer and inner characteristics. The RNG k-ε turbulent model is applied to simulate the turbulent flow of typical opening pump sump Thecomputation flow field of the sump was obtained. The design parameters of pump sump areanalyzed to how to influent the hydrulic performance and flow pattern. The recommendedmeasurements of nominal height for the pump sump are presented.Based on the basic rule of suction box, a mathematics method of optimize performance is brought forward. Numerical computation of the turbulence flow is applied to analyze the flow field of different kinds of suction box. Evolvement theory for suction box of pumping system is the suction boxes are derived from the opening pump sump. The different kinds of suction box can be united if they have same controlled essence parameters. The named height of elbow tube of pumping system is put forward.Based on the basic rule of outlet passage, a mathematics method of optimize performance is brought forward. By use of the turbulent model simulation, numerical solutions of the outlet diffusion and passage flows for the two-ways pumping system are obtained. The control parameters of outlet passage are suggested and the numerical loss of head was given. The result will be used to reconstruction of pumping system.According to analyzing some models of hydraulic loss, a loss computed method for axial-pump system is put forward base on new loss model. Based on viscous numeration of whole pumping system, a predication model of hydraulic performance has been set up. Then, an idea of hydraulic design is brought forward, which is based on part and whole perfection. Using multiple reference frames, three types of pumping system were computed. The three flows characteristic was achieved and hydraulic performances were predicated. A good agreement was achieved between prediction data with experience data. The precision of computation and prediction adapts engineering applied research.