柱塞仿生表面织构设计和密封性能分析OA

The sealing performance of the plunger in gas-lift drainage is crucial for the gas-lift drainage process.In order to investigate the influence of different surface textures on the sealing performance of the plunger,and in conjunction with biomimetic principles,five biomimetic surface textures,namely rectangular grooves,arc grooves,trapezoidal grooves,cylindrical pits,and arc pits,are selected.Computational Fluid Dynamics(CFD)fluid simulation is employed to model the two-phase gas-liquid flow during the plunger lifting process.The gas-liquid flow during the plunger lifting process is studied and analyzed,and the influence of different surface biomimetic textures on the fluid flow field between the plunger and the oil pipe wall gap and plunger sealing performance is analyzed.The results indicate that during the plunger lifting process,biomimetic surface textures intensify the interaction between gas and liquid phases,creating localized turbulence in the textured area,thereby dissipating gas energy and impeding liquid leakage.In comparison to traditional grooved textures,plunger surfaces with concave pit textures exhibit improved sealing performance,with the best performance observed for the arc pit texture with a depth of 6 mm,diameter of 12 mm,and eight evenly distributed around the circumference.These findings provide guidance for the design of plunger surface textures and the optimization of gas-lift drainage processes.