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首页> 外文期刊>International Journal of Multiphase Flow >Studies on two-phase co-current airon-Newtonian shear-thinning fluid flows in inclined smooth pipes
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Studies on two-phase co-current airon-Newtonian shear-thinning fluid flows in inclined smooth pipes

机译：斜面光滑管道中两相并流空气/非牛顿剪切稀化流体的研究

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In this work. co-current flow characteristics of airon-Newtonian liquid systems in inclined smooth pipes are studied experimentally and theoretically using transparent tubes of 20, 40 and 60 turn in diameter. Each tube includes two 10 m lone pipe branches connected by a U-bend that is capable of being inclined to any angle, from a completely horizontal to a fully vertical position. The flow rate of each phase is varied over a wide range. The studied flow phenomena are bubbly, plug flow, slug flow, churn flow and annular flow. These are observed and recorded by a high flow. stratified flow. -speed camera over a wide range of operating conditions. The effects of the liquid phase properties, the inclination angle and the pipe diameter on two-phase flow characteristics are systematically studied. The Heywood-Charles model for horizontal flow was modified to accommodate stratified flow in inclined pipes, taking into account the average void fraction and pressure drop of the mixture flow of a gason-Newtonian liquid. The pressure drop gradient model of Taitel and Barnea for a gas/Newtonian liquid slug flow was extended to include liquids possessing shear-thinning flow behaviour in inclined pipes. The comparison of the predicted values with the experimental data shows that the models presented here provide a reasonable estimate of the average void fraction and the corresponding pressure drop for the mixture flow of a gas/ non-Newtonian liquid. (C) 2007 Elsevier Ltd. All rights reserved.
机译：在这项工作中。在理论上，使用直径为20、40和60匝的透明管，对倾斜的光滑管中空气/非牛顿液体系统的并流特性进行了实验研究。每个管子包括两个10 m的单独的分支管，这些分支管由一个U形弯头连接，该U形弯头可以从完全水平到完全垂直的位置倾斜任何角度。各相的流速在很宽的范围内变化。所研究的流动现象是气泡，塞流，团状流，搅动流和环形流。高流量观察和记录这些。分层流。高速摄像机在各种工作条件下使用。系统地研究了液相性质，倾角和管径对两相流动特性的影响。考虑到气体/非牛顿液体混合物流的平均空隙率和压降，对水平流的Heywood-Charles模型进行了修改，以适应斜管中的分层流。扩展了泰特尔和巴尼亚的气/牛顿液弹流的压降梯度模型，以包括在斜管中具有剪切稀化流动特性的液体。预测值与实验数据的比较表明，此处提供的模型为气体/非牛顿液体的混合物流的平均空隙率和相应的压降提供了合理的估计。 （C）2007 Elsevier Ltd.保留所有权利。

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