弯管中多相流冲刷腐蚀数值模拟

高压注蒸汽法是当今稠油油藏开采的主要方式,在注汽管网中流体以气、液、固三相对弯管形成连续的冲刷,造成弯管的泄漏。采用湍流模型、多相流模型、离散相模型及冲刷腐蚀模型,考虑相间的相互耦合,对注汽管网中弯管的流动进行了数值模拟。结果表明,在注汽管线中,随着弯管弯曲程度的增加,液相和颗粒相分布、壁面磨损区域均逐步后移,且数值相应增大;管壁处液相体积分数的增加可有效降低固相颗粒对壁面的磨损腐蚀。

Numerical Simulation of Bend Multiphase Flow Erosion

High-pressure steam injection method is the major method of exploitation of heavy oil reservoir.In steam injection pipe network,the fluid in steam,liquid and solid phases scoured the bend and led to leakage.Based on the turbulence models,multiphase flow models,discrete phase models and erosion models,and considering the mutual coupling of the different phases,the numerical simulation of the flow of the three phases in the bend flow was established.The results show that in the steam injection pipelines,as bending degree of the bent pipe increased,the distribution and wall wear area of the liquid phases and particle phases moved backwards step by step,and the value increased accordingly.Moreover,the increase of liquid-phase volume fraction in the pipe wall could effectively reduce the surface corrosion of the solid phase.