摘要
针对石油管道运输系统中三通管的冲蚀磨损问题,采用DPM冲蚀预测模型,模拟分析了油品中夹带的固体颗粒对连接结构尺寸不同的三通管的冲蚀磨损情况,得出了颗粒对三通管冲蚀的分布规律。结果表明:T型三通管的冲蚀主要集中在与竖直管道正对的水平管道底部及其附近的外侧管壁,有球体弯头的三通管的冲蚀主要集中在球体附近水平管道的外侧管壁,且冲蚀磨损程度相对较小;随着流体流入速度的增大,2种三通管的最大冲蚀率随之增大且呈指数增长;随着颗粒质量流量的增大,2种三通管的最大冲蚀率均随之增大;当流体在2种不同的三通管中流动时,管道系统的最大冲蚀率的曲线变化趋势基本一致,均为先减小再增大;当管道弯头处球体的直径为管道直径的2倍时,管道的冲蚀速率最小,颗粒对于管道的冲蚀磨损程度最轻。
Aiming at the problem about the erosion wear of tee pipes in the petroleum pipeline transportation system,the erosion wear situation of tee pipes with different connection structures and sizes caused by the solid particles entrained in the oil was simulated by using the DPM erosion prediction model,and the distribution laws of erosion of tee pipes by the particles were obtained.The results showed that the erosion of T-shape tee pipe mainly concentrated on the bottom of the horizontal pipeline directly facing the vertical pipeline and its nearby external pipeline wall,while the erosion of tee pipe with the sphere elbow mainly concentrated on the external pipeline wall of the horizontal pipeline near the sphere,with a relatively smaller erosion wear degree.The maximum erosion rates of two kinds of tee pipe increased exponentially with the increase of fluid inlet velocity,and the maximum erosion rates of both tee pipes increased with the increase of particle mass flow rate.When the fluid flowed in the two kinds of tee pipe,the changing trends of the maximum erosion rate curves in the pipeline system were basically consistent,which both decreased first and then increased.When the sphere diameter of the pipeline elbow was two times of the pipeline diameter,the erosion rate of the pipeline was the minimum,and the erosion wear degree of the pipeline by the particles was the lightest.
出处
《中国安全生产科学技术》
CAS
CSCD
北大核心
2017年第12期91-97,共7页
Journal of Safety Science and Technology
基金
国家自然科学基金项目(41502100)
关键词
三通管
结构尺寸
冲蚀磨损
固体颗粒
数值模拟
tee pipe
structure and size
erosion wear
solid particles
numerical simulation
