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首页> 外文期刊>Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers >Experimental study on the restart of core-annular flow
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Experimental study on the restart of core-annular flow

机译：试验研究core-annular的重启流

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We show the results of an experimental campaign to study the pressure drop during the restart of a core-annular flow from a stratified configuration. In normal core annular flow operations, due to fouling or pump failures, a core flow may not be sustained anymore and hence it stratifies. Since the pressure drops connected to the stratified flow regime are much larger than the ones of core annular, the flow suddenly stops. To restart it there are two possibilities: one is to try to provide a higher pressure gradient trying to restore the flow of water and oil, the other is to clean the pipe using water only: in both cases an attachment of a thin layer of oil on the pipe internal wall occurs and the pressure drop for water only or oil-water are higher than the previous ones with clean pipe wall. We focused our attention on the cleaning by water only and we provide experimental data on the evolution of the pressure drop as function of time in order to find when the pipe could be considered as perfectly cleaned or, at least, when the pressure drop are low enough to restart the oil flow. The experimental results are finally compared with a two-fluid model available in literature.
机译：我们展示了一个实验性的运动的结果研究了压降在重启的core-annular从分层流配置。操作,由于污染或泵故障,核心流程可能不是持续的了,因此分层。分层流态的大得多比的核心环,突然流停止。一个是试图提供一个更高的压力梯度试图恢复水和流动石油,另一种是使用水清洗管道只在两种情况下:一个附件的一个薄层石油管道内壁发生和压降对水或油水用干净的管高于以往墙。水只和我们提供实验数据的压降随着功能的进化为了找到当管道视为完全清理,或者至少,足够低的压降时重新启动石油流。最后比双流体模型可用在文学。

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