大倾角上倾管气液两相流动特性

发布时间：2018-07-04 15:21

本文选题：上倾管 + 气液混输　；参考：《化工进展》2017年08期

【摘要】：针对地形起伏区域常见的大倾角上倾管气液两相流动问题,利用室内实验装置进行气液混输实验,对气液两相流的流型、压力波动特性进行了研究。实验中观测到6种流型,得到了不同气液流量和倾角下压力波动的时域值、概率密度函数(PDF)、累积分布函数(CDF)和功率谱密度(PSD)特征。实验结果分析表明:由于气体的膨胀和段塞运动的惯性,严重段塞流气液喷发阶段时,上倾管上部会出现下部压力小于上部压力的现象;得到了不同折算气速、折算液速和倾角的压力信号并进行统计学分析;PDF呈单峰或双峰分布;不同流型的CDF的斜率、拐点和曲线位置不同;PSD图会出现一阶、二阶、三阶和多阶波峰,甚至无波峰分布;在同等气液流量下,随着倾角的增加,严重段塞流的周期和压力波动值增大;结合压力波动特性及对应分析结果可以进行流型识别并对设备的选型以及管道的安全运行提供参考。
[Abstract]:In order to solve the problem of gas-liquid two-phase flow in large dip pipe with large dip angle, the gas-liquid mixed transport experiment was carried out in laboratory. The flow pattern and pressure fluctuation characteristics of gas-liquid two-phase flow were studied. Six kinds of flow patterns were observed, and the time domain values, probability density function (PDF), cumulative distribution function (CDF) and power spectral density (PSD) characteristics of pressure fluctuations under different gas-liquid flow and dip angles were obtained. The experimental results show that due to the expansion of gas and inertia of slug motion, the lower pressure of the upper part of the updip pipe will be smaller than the upper pressure during the stage of gas-liquid eruption of the serious slug, and different converted gas velocities can be obtained. The pressure signals of liquid velocities and dip angles were converted and analyzed statistically, and the distribution of PDF was single peak or double peak, and the slope, inflection point and curve position of CDF with different flow patterns showed the first, second, third and multi-order peaks, even without the distribution of the peaks, and the slope, inflection point and curve position of CDF of different flow patterns were different, and the pressure signals of liquid velocity and inclination angle were analyzed statistically. Under the same gas-liquid flow rate, with the increase of inclination angle, the period and pressure fluctuation value of serious slug flow increase. Combined with the pressure fluctuation characteristic and the corresponding analysis result, the flow pattern can be identified and the reference can be provided for the selection of the equipment and the safe operation of the pipeline.
【作者单位】：中国石油大学(华东)储运与建筑工程学院;山东省油气储运安全省级重点实验室;西南交通大学力学与工程学院;北京中航油工程建设有限公司;
【基金】：国家自然科学基金项目(51404290)
【分类号】：O359.1

【参考文献】