油水分散流超声互相关流速测量方法  

Dispersed Oil-Water Two-Phase Flow Velocity Measurement Based on Ultrasonic Cross-Correlation Technique

作　　者：史雪薇 董虓霄[1] 谭超[1] 董峰[1] 

机构地区：[1]天津市过程检测与控制重点实验室,天津大学电气自动化与信息工程学院,天津300072

出　　处：《工程热物理学报》2017年第3期562-567,共6页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.61227006,No.61473206)

摘　　要：针对水平管道中油水分散流流速测量问题,提出一种基于超声互相关的测量方法。通过在水平管道上间隔一定距离的上下游安装两对超声探头获取油水两相流流动过程中的随机波动信号,针对离散相和连续相之间的相对滑动,将互相关方法与漂移模型和运动波理论相结合,并考虑流速分布和含率分布对流速测量带来的影响,在连续相不同的情况下分别建立两相流总表观流速的测量模型,并采用油水两相流实际流动状态的实验数据计算模型参数。结果表明,测量模型对流型具有依赖性,漂移速度是离散相含率的函数。通过实验数据对模型进行验证,针对不同流型选取不同参数计算得到的总表观流速与实际流速能够较好吻合,相对误差在6.12%以内。For the overall superficial velocity measurement of dispersed oil-water flow in horizontal pipeline,a measuring method based on ultrasonic cross-correlation technique is introduced.Two pairs of ultrasonic probes are installed in the upstream and downstream within a certain distance to obtain the flow signal of two-phase flow.Considering the slip between the dispersed phase and the continuous phase and the influence of velocity profile and phase distribution on the measurement,the overall superficial velocity measurement model is established by combining the cross-correlation algorithm,drift-flux model and kinematic wave theory.The parameters of this model were calculated by the experimental data under different flow states.The results show that the measurement model is dependent on the flow regime,and the drift velocity is a function of the holdup.The model is validated by experimental data,and it shows that the overall superficial flow velocity calculated by this model is in good agreement with the actual flow velocity.The relative error is less than 6.12%.

关 键 词：油水分散流 表观流速 互相关 漂移模型 运动波 

分 类 号：TH815[机械工程—仪器科学与技术]