| An experimental study on characteristics of two-phase flows in vertical pipe
Woo Gun Sim, B. M. Bae and N. W. Mureithi
The Journal of Mechanical Science and Technology, vol. 24, no. 10, pp.1981-1988, 2010
Abstract : The characteristics of two-phase flow in a vertical pipe are investigated to provide information for understanding the excitation mechanisms
of flow-induced vibration. An analytical model for two-phase flow in a pipe was developed by Sim et al. (2005), based on a power
law for the distributions of flow parameters across the pipe diameter, such as gas velocity, liquid velocity and void fraction. An experimental
study was undertaken to verify the model. The unsteady momentum flux impinging on a ‘turning tee’ (or a ‘circular plate’) has
been measured at the exit of the pipe, using a force sensor. From the measured data, especially for slug flow, the predominant frequency
and the RMS value of the unsteady momentum flux have been evaluated. It is found that the analytical method, given by Sim et al. for
slug flow, can be used to predict the momentum flux.
Keyword : Bubbly flow; Drift flux model; Dynamic reaction force; Homogeneous model; Momentum flux of two-phase flow; Power law distribution; Slug flow; Strouhal number; Void fraction |
