弯管与盲通管冲蚀磨损对比分析研究

发布时间：2018-01-13 00:12

本文关键词：弯管与盲通管冲蚀磨损对比分析研究　出处：《中国安全生产科学技术》2017年03期 　论文类型：期刊论文

【摘要】：为了研究石油管道流向急剧改变处的冲蚀磨损问题,采用DPM模型,通过改变入口流速、颗粒质量流速、颗粒直径,对90°弯管与盲通管的流场分布及冲蚀情况进行数值模拟。结果表明:弯管与盲通管最大冲蚀速率随入口流速的增大呈指数增长,随颗粒质量流速的增大呈线性增长;在50~100μm粒径范围内,最大冲蚀速率随粒径的增加逐渐减小,在100~300μm粒径范围内,随粒径的增加而增大;在入口流速、颗粒质量流速、颗粒直径相同的条件下,弯管最大冲蚀速率明显高于盲通管最大冲蚀速率,盲通管的耐蚀性更强;由于流体在盲通管产生涡旋现象,增加了颗粒能量的耗散,从而减小了进入下游管线颗粒的速率,使得颗粒更易积存于盲通段形成堆积层,减小了下游管段冲蚀速率。
[Abstract]:In order to study the erosion and wear problem of oil pipeline at the point of sharp change of flow direction, the DPM model was used to change the inlet velocity, particle mass velocity and particle diameter. The flow field distribution and erosion of 90 掳bend and blind pipe are simulated. The results show that the maximum erosion rate increases exponentially with the increase of inlet velocity. The particle mass velocity increases linearly with the increase of particle mass velocity. The maximum erosion rate decreases gradually with the increase of particle size in the range of 50 渭 m ~ 100 渭 m, and increases with the increase of particle size in the range of 100 渭 m ~ 300 渭 m. When the inlet velocity, particle mass velocity and particle diameter are the same, the maximum erosion rate of the curved pipe is obviously higher than that of the blind pipe, and the corrosion resistance of the blind pipe is stronger. The vortex phenomenon of fluid in the blind pipe increases the dissipation of particle energy, thus reducing the velocity of particles entering the downstream pipeline, which makes the particles easier to accumulate in the blind channel to form an accumulation layer. The erosion rate of downstream pipe section is reduced.
【作者单位】：辽宁石油化工大学石油天然气工程学院;
【基金】：国家自然科学基金项目(41502100)
【分类号】：TE973
【正文快照】： 0引言在使用管道输送油品的过程中,油品中通常夹杂有岩屑颗粒,会造成管壁的冲蚀破坏,尤其是流体在弯头转向时,会对弯头造成严重的冲刷腐蚀。在某些特殊工况下,流体在弯头处对管壁的磨削程度比在水平管段大30~40倍。近年来,管道冲蚀问题已成为国内外科研工作者的研究热点之一。

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