Stability of Stratified Gas-Liquid Flow in Horizontal and Near Horizontal Pipes

A viscous Kelvin-Helmholtz criterion of the interfacial wave instability is proposed in this paper based on the linear stability analysis of a transient one-dimensional two-fluid model. In thismodel, the pressure is evaluated using the local momentum balance rather than the hydrostatic approximation. The criterion predicts well the stability limit of stratified flow in horizontal and nearly horizontal pipes. The experimental and theoretical investigation on the effect of pipe inclination on the interfacial instability are carded out. It is found that the critical liquid height at the onset of interfacial wave instability is insensitive to the pipe inclination. However, the pipe inclination significantly affects critical superficial liquid velocity and wave velocity especially lor low gas velocities.

一粘滞界面的波浪不稳定性的 Kelvin-Helmholtz 标准基于一个短暂一个维的二液体的模型的线性稳定性分析在这篇论文被建议。在这个模型，压力用本地动量平衡而非静水力学的近似被评估。标准在水平、将近水平的管子中预言成层的流动的稳定性限制很好。界面的不稳定性上的管子倾斜的效果上的试验性、理论的调查被执行。在界面的波浪不稳定性的发作的批评液体高度对管子倾斜感觉迟钝，这被发现。然而，管子倾斜显著地特别为低煤气的速度影响批评表面的液体速度和波浪速度。