空间Z形管路液-固两相流冲蚀特性分析

Analysis of Erosion Characteristics of Liquid-solid Two-phase Flow in Space Z-shape Pipeline

空间Z形管路是油气开采过程典型的结构形式,在工程作业中受到高压高速液-固两相流的作用,容易导致管路系统产生冲蚀磨损失效。基于液-固两相流冲蚀磨损理论,选取合适的冲蚀磨损理论模型,讨论了流速、颗粒直径、质量流量、黏度以及重力等不同流体参数对管路系统弯头处的冲蚀磨损情况。结果表明:管路弯头处的冲蚀区域受内流场的影响存在明显差异,出口端弯头处的最大冲蚀率大于进口端弯管端。流速、颗粒直径、质量流量与整体管路最大冲蚀率呈正相关关系,黏度与整体管路最大冲蚀率呈负相关关系。分析了不同工况下空间Z形管路的冲蚀特性,获得了流体参数对管路冲蚀的影响规律,为工程实际复杂管路系统冲蚀磨损寿命预测提供技术参考。

Space Z-shape pipeline is a typical structural form in the process of oil and gas production.It is affected by high-pressure and high-speed solid-liquid two-phase flow in engineering operation,which is easy to lead to erosion and wear failure of the pipeline system.Based on the theory of erosive wear in liquid-solid two-phase flow,this paper selects an appropriate theoretical model of erosive wear,discusses the impact of different fluid parameters such as flow velocity,particle diameter,mass flow,viscosity and gravity on the erosion wear at the elbow of pipeline system.The results show that the erosion area at the elbow of the pipeline is affected by the internal flow field.The maximum erosion rate at the elbow at the outlet end is greater than that at the elbow end at the inlet end.The velocity,particle diameter and mass flow are positively correlated with the maximum erosion rate,but the viscosity is opposite.In this paper,the erosion characteristics of space Z-shape pipeline under different working conditions are analyzed,the influence law of fluid parameters on pipeline erosion is obtained,which provides a technical reference for the erosion wear life prediction of complex pipeline system in engineering practice.