基于运动波理论辨识垂直上升管中油水两相流流型

Flow pattern identification of oil-water two phase flow in vertical upward pipes based on kinematic wave theory

基于运动波理论建立了垂直上升管中油水两相流运动波传播特性方程 ,在计算油水两相流运动波传播速度特性曲线的基础上 ,分析了运动波传播速度不稳定性与流型转化的对应关系 ,确定了油水两相流过渡流型存在于持水率大于 0 .2 0并小于 0 .60的区间 ,由此建立了油水两相流流型向水包油及油包水流型转化的边界方程 ,并提出了辨识垂直上升管中油水两相流流型的新准则 .应用该准则辨识了Govier等人观察到的油水两相流流型 。

The propagation equation of kinematic wave concerning oil\|water two phase flow in vertical upward pipes is proposed. It is concluded that the transitional zone of the flow pattern from oil external to water external flow is associated with kinematic wave propagation instabilities which corresponds to water holdup from 0.2 to 0.6, based on calculated characteristic curves of kinematic wave propagation velocities in oil\|water two phase flow. Finally, the boundary equations and the new criterion of flow pattern identification are obtained. The new criterion of flow pattern identification is supported by the Govier et al's experimental test results.