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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。
In order to solve the problem of flow velocity measurement of oil-water dispersed flow in horizontal pipelines, a measurement method based on cross-correlation of ultrasonic waves is proposed. Two pairs of ultrasonic probes are installed upstream and downstream of a horizontal pipeline to acquire random fluctuation signals during the flow of oil-water two-phase flow. For the relative slip between the discrete phase and the continuous phase, the cross-correlation method is combined with the drift model and the movement Wave theory and considering the influence of flow velocity distribution and holdup distribution on flow velocity measurement, a measurement model of total apparent flow velocity of two-phase flow is established respectively under different continuous phases, and the actual flow state of oil-water two-phase flow The experimental data were used to calculate the model parameters. The results show that the measurement model is dependent on the flow pattern and the drift velocity is a function of the discrete phase fraction. The experimental data are used to validate the model. The calculated total apparent velocity and actual velocity for different flow patterns can be in good agreement with the relative error less than 6.12%.