摘要
为了研究固体颗粒参数及弯管结构参数变化条件下弯管的冲蚀规律及最大冲蚀位置,基于CFD软件Fluent对弯管进行了网格无关性分析和入口段长度分析来确定最佳分析模型,选用Oka冲蚀模型和Forder壁面恢复模型计算弯管冲蚀,研究了颗粒直径和管径比对弯管最大冲蚀位置的影响。分析结果表明:颗粒速度对冲蚀速率的影响较大,二者呈指数关系,冲蚀速率随质量流量的增加比较均匀,当颗粒直径达到一定大小后,冲蚀速率增加较慢;管道直径和管径增大均会减小弯管的冲蚀速率,管径比对冲蚀速率的影响较大,二者呈现指数关系;颗粒直径基本不影响最大冲蚀位置,而最大冲蚀角度随着管径比的增大而减小。所得结果对管道设计及工程实际安全运营具有一定的指导作用。
To study the erosion law and maximum erosion position of bend pipe under the influence of solid particle parameters and bend pipe structure parameters,the grid-independent analysis and inlet length analysis of bend pipe are performed based on CFD software Fluent to determine the best analysis model.The erosion of the bend pipe is calculated by using the Oka erosion model and the Forder wall recovery model.The effects of particle diameter and pipe diameter ratio on the maximum erosion position of the bend pipe are studied.The analysis results show that the particle velocity has a great influence on the erosion rate with exponential relationship.The erosion rate is uniform with the increase of mass flow.When the particle diameter increases to a certain size,the erosion rate increase becomes slow.The increase of pipe diameter and pipe diameter ratio will reduce the bend pipe erosion rate.The pipe diameter ratio has a greater influence on the erosion rate with an exponential relationship.The particle diameter does not affect the maximum erosion position.The maximum erosion angle decreases with the pipe diameter ratio.The study has a certain guiding role for pipeline design and actual safety operation of the project.
作者
杨德成
朱宏武
Yang Decheng;Zhu Hongwu(College of Mechanical and Transportation Engineering,China University of Petroleum(Beijing))
出处
《石油机械》
北大核心
2019年第10期125-132,共8页
China Petroleum Machinery
基金
中国石油科学研究与技术开发项目“海底管道维抢修方法及应急预案研究”(BK-11-02-J)
关键词
气固两相流
弯管
冲蚀速率
颗粒速度
质量流量
冲蚀模型
管径比
gas-solid two-phase flow
bend pipe
erosion rate
particle velocity
mass flow
erosion model
pipe diameter ratio
