Clear Water Flow Field Numerical Simulation Of "Turbid Water Hydraulic Power Separation Equipment"

A new separator of clear water field of a turbid water hydraulic power separation equipment was invented by the term of the hydraulic teaching and research section of Hydraulic and civil Engineering College of Xinjiang Agriculture University , this separator only depends on dynamic turbid's hydraulic power itself to obtain the clear water ,and the separated sediment are all get rid of by hydraulic power itself, without any other power and chemicals input , due to its simple structure, low cost and low running cost, the separator changed tradition city water which depends on adding chemicals to dispose sediment, greatly improved the water quality. It has solved the dispersible farmland and pasture populace of Xinjiang area along the multi-sands rivers and spreaded the appliance of advanced saves water technology of the spurts and drip irrigation, which has the broad prospect in the area.This paper uses the three–dimensional numerical simulation to compute the field of clear water of turbid water hydraulic power separation equipment. The simulation can reveal the interior mechanism and hydrodynamics character of fluid thoroughly.Using FLUENT, the CFD software of computer hydrodynamics, the three–dimensional numerical simulation of turbid water hydraulic power separation equipment is researched in this thesis. No supended slab and supended slab of numerical simulation were computed. We have simulated the velocity field of liquid in two conditions and analysed the computation results. In the preparation stage, k ?εmodel, RNG k ?εmodel, RSM model were used to compute and compare for the computed results and test results, ultimately we got the most approximate numerical model of the separator .We have got the following conclusions from the results of numerical research in this thesis:(1) The results show that the separator of flow is a typical 3D non-axial symmetry flow field, and eccentricity vortex revolved round the center of separator which existed in flow field, the spinning direction is the same as the flow direction, and it has the forced vortex character, vθrn =C,(n<0);(2)The result shows that the separator can be devided into there regions approximately: gravity area , transition area , conic area. Inside of the separator axial velocity decreases with the increasing of z axis in gravity area, and it takes on the downward axial velocity area(clear water area). Under the influence of culvert inlet, flow pattern of transition area has no steady state and clear law. In conic area, as flow approaches the bottom of conic, the negative axial velocity increases, and upward axial velocity decreases...