弯管中气固两相流冲蚀模拟研究

Simulation of gas-solid two-phase flow erosion in elbow

以某含有固体杂质微粒的输气过程为研究背景,运用ANSYS-FLUENT软件中E/CRC冲蚀磨损模型,对输气管道中的90°弯管进行气-固两相流的模拟计算,讨论不同的气体速度、固体杂质微粒的质量流率以及固体杂质微粒的微粒粒径对弯管的冲蚀磨损的影响.分析结果表明:气体入口速度越大,90°弯管的冲蚀率越大;固体杂质微粒质量流率越大,90°弯管的冲蚀率越大;当微粒粒径小于某一临界值时,微粒粒径越大,冲蚀率减小,当微粒粒径大于这一临界值时,微粒粒径越大,冲蚀率越大.在工程应用中可用于气体运输管道的检测,节约检测成本,提高管道输气的安全性.

On the basis of research background of a gas transmission process containing solid impurity particles,a E/CRC model for erosion-induced wear developed in ANSYS-FLUENT software is used in this paper to simulate the gas-solid two-phase flow in a 90°curved pipe in a gas pipeline.All effects such as different gas velocity,mass flow rate of solid impurity particles,and particle size of solid impurity particles on erosion-induced wear to 90°elbow of the curved pipe are discussed in detail.Our analytical results show that the larger the gas inlet velocity is,the greater the erosion rate of 90°bend is,and the greater the mass flow rate of solid impurity particles is,the greater the erosion rate of 90°bend is.As if the particle size is less than a certain critical value,the larger the particle size is,the smaller the erosion rate is.When the particle size is larger than this critical value,the larger the particle size is,the greater the erosion rate is.The research result can be used in duty inspection of gas transportation pipeline by predicting the possibility of pipeline erosion,which can save the inspection cost and improve the safety of gas transportation in pipeline.