摘要
受气液两相流流动的复杂性影响,传统的两相流计量方式难以保证计量精度。在分流分相法的基础上,提出了流型调整、均匀取样、压力调节相结合的取样方法,设计加工了一种环壁多窄缝小比例取样器,运用CFD仿真软件Eulerian-Eulerian方法确定了取样位置,分析了两相流在取样器中的流动特性,并通过实验研究了不同气、液相折算速度与入口流型对取样器工作效果的影响。研究结果表明:本文设计的取样器工作范围为气相折算速度3~18m/s,液相折算速度0.05~0.33m/s,气液相分流系数接近理论值0.167,气液相计量误差均小于±5%。本文设计的环壁多窄缝取样器无运动部件、体积紧凑、所需分离装置体积小,可代替传统的分配计量装置,对实现两相流的精确计量具有重要意义。
Due to the complexity of gas-liquid two-phase flow,the traditional two-phase flow measurement method is difficult to guarantee the accuracy. On the basis of the extraction and separation method,the method of “flow pattern adjustment” combined with “uniform sampling” and “pressure adjustment” is proposed,and a new type of pipe-around multi-slot sampling device is designed. The sampling location is determined and the flow characteristics are analyzed by Eulerian-Eulerian method using CFD simulation software. The effects of different gas,liquid superficial velocities and different flow patterns are studied through experiments to evaluate the working efficiency of the sampling device. The results show that the working range of the sampling device at gas superficial velocity is 3~ 18 m/s,and that at liquid superficial velocity is 0.05~0.33 m/s. The gas and liquid extraction ratio is close to the theoretical value 0.167 and gas-liquid flow rate measurement error is less than ±5 %. The device has no moving part,and it requires separation device with small volume,which can replace the traditional distribution metering device. This device has great significance for the accurate measurement of two-phase flow.
作者
孙媛
曹学文
梁法春
SUN Yuan;CAO Xuewen;LIANG Fachun(College of Pipeline and Civil Engineering,China University of Petroleum,Qingdao,Shandong 266580,China)
出处
《中国海上油气》
CAS
CSCD
北大核心
2019年第3期190-198,共9页
China Offshore Oil and Gas
基金
国家重点研发计划专项“临海油气管道检测、监控技术研究与仪器装备研制(编号:2016YFC0802302)”
国家自然科学基金“水下油气临界分流取样计量理论及实现方法(编号:51574272)”
中国石油大学(华东)自主创新科研计划“水下油气管线微孔泄漏及扩散特性研究(编号:18CX06039A)”部分研究成果
关键词
气液两相流
分流分相法
计量
环壁多窄缝取样器
结构设计
数值分析
工作效果实验
gas-liquid two-phase flow
extraction and separation method
metering
pipe-around multi-slot sampling device
physical design
numerical analysis
working efficiency experiment
