Measurement of Oil-Water Two-Phase Flow Phase Fraction With Ultrasound Attenuation
Measurement of Oil-Water Two-Phase Flow Phase Fraction With Ultrasound Attenuation
复制标题
超声衰减法测量油水两相流相分数
DOI：
10.1109/jsen.2017.2779868
复制
发表时间：
2018-02-01
影响因子：
4.3
通讯作者：
Dong, Feng
中科院分区：
文献类型：
--
作者：
Su, Qian;Tan, Chao;Dong, Feng
油水两相流相含量对过程控制和优化具有重要意义。本文提出了一种基于超声在油水混合物中衰减机理的预测模型来估算油水混合物的相组成。该模型考虑了超声在油水两相流不同流型中的散射和衰减，包含了两相流的物理参数和超声频率。修正了超声衰减系数与相分数之间的非线性关系。提出了一种中心频率为1 MHz、正弦声信号为20Vpp的16个超声换能器阵列，设计了测量系统，并在多相流回路上进行了实际流动实验。在流动实验中，该预测模型与在线相分数校正结果吻合较好。对于水连续流，平均误差为2.3%；对于油连续流，平均误差为2.8%。这些结果和机理预测模型为利用超声衰减技术估算油水两相流相含量提供了基本依据。
Phase fraction of oil-water two-phase flow is important to the process control and optimization. In this paper, a prediction model based on the mechanism of ultrasound attenuations in oil-water mixture is presented to estimate the phase fraction. This model consists of physical parameters of the two-phase flow and ultrasound frequency, by incorporating the scattering and attenuation of ultrasound in different flow patterns of the oil-water two-phase flow. The nonlinear relationship between ultrasound attenuation coefficient and phase fraction is corrected. An array of 16 ultrasonic transducers with 1-MHz center frequency and 20-Vpp sine acoustic signal is presented to implement this method, and a measuring system was designed and tested on a multiphase flow loop with actual flow experiments. The proposed prediction model showed a good agreement with the online phase fraction calibration in the flow experiments. The average error is 2.3% in water continuous flow, while in 2.8% in oil continuous flow. These findings and the mechanism prediction model provide basic foundations for the phase fraction estimation of oil-water two-phase flow by using the ultrasound attenuation technique.