Damping of tubes due to internal two-phase flow

被引：19
|
作者：
Gravelle, A. [1 ]
Ross, A. [1 ]
Pettigrew, M. J. [1 ]
Mureithi, N. W. [1 ]
机构：
[1] Ecole Polytech, Dept Mech Engn, Montreal, PQ H3T 3A7, Canada
来源：
JOURNAL OF FLUIDS AND STRUCTURES | 2007年 / 23卷 / 03期
基金：
加拿大自然科学与工程研究理事会;
关键词：
two-phase flow; damping; flow parameters; interface surface area;
D O I：
10.1016/j.jfluidstructs.2006.09.008
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Two-phase internal flow is present in many piping system components. Although two-phase damping is known to be a significant constituent of the total damping, the energy dissipation mechanisms that govern two-phase damping are not well understood. In this paper, damping of three different clamped-clamped tubes subjected to two-phase air-water internal axial flow is investigated. Experimental data are reported, showing a strong dependence of two-phase damping on void fraction, flow velocity and flow regime. Data-points plotted on two-phase flow pattern maps indicate that damping is greater in a bubbly flow regime. The two-phase damping ratio reaches a maximum value at the highest void fraction before the transition to a churn flow regime. An analytical model that relates the two-phase damping ratio to the interface surface area is proposed. The model is based on rigid spherical bubbles in cubic elementary flow volumes. The analytical results are well correlated with the experiments. (C) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码：447 / 462
页数：16
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