混砂泵固液兩相流流致振動仿真分析

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DaiQiping，Sun Tianhui，Peng Junwei，etal.Simulation analysisof vibration induced bysolid-liquid two-phase flow in sand mixing pump[J].China PetroleumMachinery，2O25，53（6）：117-124.

Simulation Analysisof Vibration Induced bySolid-Liquid Two-Phase Flow in Sand Mixing Pump

Dai Qiping1，2Sun Tianhui3Peng Junwei1，2Dong Fuqiang1.2Li Sen 1，2 Zhou Qing12Tang Xiao 1，2 （1.CNPCNationalPetroleumDrilingEquipmentEngineringTchnologyResearchCenteCompanyLimited;2.CNPCBajiOilfieldMachineryCo.，Ltd.；3.ChinaUniversityofPetroleum（Beijing））

Abstract：Due to harsh working environment，vibration failure often occurs in sand mixing pump for hydraulic fracturing.To solve this problem，a CFD-DEM coupling calculation method was used to build asolid-liquid two-phase flow simulation model.Under the condition of different impeller speeds，flow rates，particle sizes and sand mixing concentrations，the influence of external characteristics of centrifugal pump under solid-liquid twophase flow condition was analyzed.Meanwhile，thefluid forces acting onthe volute and impellerof thecentrifugal pump in the x ， y and z directions were monitored and analyzed，and the power spectral density curves of the volute and impeller in the x ， y and z directions were obtained using the periodogram method. The research results show thattheaddition of particle phase leads toa decrease inthe delivery headand eficiencyofcentrifugal pump.The main vibration directions of the impeller and volute aretheaxial direction of the impellerand theoutlet directionof the voluterespectively，andthe main vibrationfrequency is the blade frequency.The impeller speed and flowrate are the main factors affcting the vibration power of centrifugal pump：every time the impeller speed rises by 100r/ （20 min，the main vibration power of the impeller and volute is increased by 36. 15% and 37. 71% respectively， every time the flow rate increases by 3.78m3/min ，the main vibration power of the impeller is increased by 28. 45% on average，and that of the volute decreased by 11. 27% on average. The influence of sand concentration and particle size on vibration is relatively small.

Keywords：sand mixing pump；solid -liquid two-phase flow；CFD-DEM；power spectral density；flov induced vibration

0 引言

混砂泵作為重要的壓裂液輸送設(shè)備，因其具備高流量和高輸出功率等特點(diǎn)，在油田的壓裂作業(yè)中起到重要作用[1-2]。（剩余11703字）