Double-channel Sewage Pump Flow Analysis And Design Method Of The Research

Double channel impeller pump is a special structure of the centrifugal pump, impeller imports to exports from the two symmetrical curved flow, without blocking performance, mainly used for pumping sewage, industrial waste water and industrial processes contain solid particles suspended fibrous material and suspended solids in the liquid. Dual channel, special shape, internal flow complex is a hot research topic in recent years at home and abroad and focuses on the development of new products.This article studies the 50QW25-22-3 double channel impeller sewage pumps hydraulic design and numerical simulation using CFD were in the clear water of its medium, solid-liquid two-phase medium in the numerical simulation, analysis of different particle concentration and particle size on the double channel of different sewage pump performance and internal flow field, has made some innovative results. Specific study as follows:1. According to the specific parameters on the double channel impeller pump, hydraulic design on hydraulic design in the improvement measures.Such values, and increase to ordinary spiral throat area 1.53 times of centrifugal pump.2. Analysis of turbulence model, and applied to two-phase flow simulation calculations.3. Using Pro/Engineer and Gambit software designed impeller three-dimensional modeling, and generate the grid.4. By Fluent6.3.26 software, use two-phase flow model, at different solid volume fraction (concentration), particle size under different impeller flow field, the impact of flow were calculated, analysis of model results.5. To study the sewage pump was calculated, and according to the forecast results go to determine ways of double channel impeller pump design is successful.The results show that the double channel sewage pumping performance of solid-liquid two-phase medium is very advantageous. Simulation data and measured data by comparing the simulated water pump performance curve and the measured performance curves remained the same, so the overall point of view, this paper designed a double channel-type water pump is successful, Using the turbulent model and boundary conditions given is reasonable.For sewage pump design and provides theoretical basis for numerical calculation...