摘要
根据超声波在不同介质界面处的反射回波强弱不同的特性,提出了应用超声波对水平管气液两相流流型进行非介入式在线识别的方法。理论计算得到钢管内壁接触的介质分别为水和空气时的声压反射率,证明了超声波流型识别法的可行性。数值仿真研究管内的流体分别为水、空气时不同界面的反射回波特点,得到了超声波流型识别法的实现方式。依据数值仿真结果,开展超声波气液两相流流型在线识别实验,分析气液两种流体在管道横截面上的分布,从而识别水平管气液两相流流型。研究结果表明:在不影响生产的前提下,超声波流型识别方法能够准确获取水平管气液两相流流动过程中的实时流型,操作方法简便,且结果可靠。(图10,表1,参9)
Because the echo attenuation of ultrasonic on different medium interface is different, the method of non-intrusive on-line identifying of gas-liquid two-phase flow pattern by ultrasonic is proposed. Reflection coefficient of sound pressure when the medium contacted with the pipe inner surface is water and air is calculated, which proves the feasibility of identify flow pattern with ultrasonic. Numerical simulation is made to research the characteristics of echo attenuation. When the fluid in the pipe is water or air respectively, the implementation mode of identification method for ultrasonic flow pattern at different surface is obtained. According to the results of numerical simulation, on-line identification experiment on ultrasonic gas-liquid two-phase flow pattern is carried out, to analyze the distribution of gas and liquid at intersecting surface, and identify the flow pattern of gas-liquid two-phase flow in horizontal pipe. The results show that under the premise of pipeline running, the flow pattern can be acquired in real time accurately by ultrasonic flow pattern identification method in gas- liquid two-phase flow process, with easy operation and reliable result. （10 Figures, 1 Table, 9 References）
出处
《油气储运》
CAS
2014年第2期165-171,共7页
Oil & Gas Storage and Transportation
基金
国家自然科学基金资助项目"音速喷嘴中气液两相流临界分配特性及相分离控制理论"
51006123
关键词
两相流
超声波
流型识别
非介入式
数值模拟
实验验证
two-phase flow, ultrasonic, flow pattem recognition, non-intrusive, numerical simulation, experimental verification
