Analysis Of The Whole Machine Internal Flow And Characteristic Based On The Parametric Changes Of The Compression Stage In The Oil-gas Multiphase Pump

Because of the continued exploitation of oil fields, especially water flooding and gas-lift production are adopted in maturing oilfield, in fact, oil-gas multiphase pump works in oil, gas, water and solid impurities of the coexistence of heterogeneous mixtures transport conditions, which put forward the multiphase pump design higher requirements. As the complexity of multiphase flow, the design of the multiphase pump has no mature theory and method for guidance up to the present. In recent years, along with the deepening of the pump research, carried out the internal flow and performance of overall model research, considering the over-current components on the transportation performance will become the mainstream trend.This thesis researches the oil-gas multiphase pump from the aspects of internal flow and characteristics of the machine, adopting piecewise incompressible thinking, borrowing ideas from singularity distribution method designed the rotor blade and using streamline-method designed the stator blade of the compression stage in the axial multiphase pump. Assuming ways of AutoCAD and UG combination build a machine to solve three-dimensional model. Introducing the powerful mesh generation software ICEM-CFD divided machine model into the grid. Utilizing Fluent software simulated the internal flow of the overall model while the blade overlap coefficient, stator spacing, stator exit angle, stator blade number design parameters changed in the compression stage,which provided the design basis for parameters selection of the prototype itself.Overall simulation results show that while the compression stage design parameter changed within the rotor and stator, not only has its own flow of influence, but also its neighboring over-current components have a certain influence on the flow, which over-current components on a single simulation, is unable to obtain. Therefore, to machine as the research object, the simulation results with greater authenticity and relevance.Drawn the characteristic curves by simulating the compression stage when above-mentioned design parameters changed of the machine, further experimental studies for the discussion group, the simulation results provided a contrast with the experimental preparation, which proves the feasibility of design and test simulation reliability of the results.