Modelling Two-Phase Flow-Excited Damping and Fluidelastic Instability in Tube Arrays

Fluid-elastic instability in tube arrays subjected to air-water and steam-water cross-flow

“…This effect was not observed by Axisa et al (1985) who did not notice any difference between the steam-water and air-water flow experiments in terms of the onset of instability when plotted using Connors' criterion. However, differences in the properties of the fluid systems such as the density ratio, surface tension, viscosity and thermal diffusivity have been pointed out by a number of investigators (Pettigrew et al, 2002;Feenstra et al, 2002) and hence a change in the fluid-elastic forces can be expected based on these differences in fluid thermophysical properties. Effects due to the drag experienced on the tubes in the two fluid systems could also have an effect on the instability.…”

“…The experiments of Pettigrew et al (1995) and Feenstra et al (2002) were carried out in Freon flow, whereas the experiments of Hirota et al (2002), Axisa et al (1985) and the present study were carried out in steam-water flow. In the present study and the study of Hirota et al (2002), tubes were suspended using piano wires while Pettigrew et al (1995) and Feenstra et al (2002) used cantilevered tubes.…”

“…Feenstra et al (2000Feenstra et al ( , 2002 carried out experiments using Freon as the working fluid. Their objective was to develop a methodology for predicting critical velocities for fluid-elastic instability based on the physics of the phenomenon.…”

Cross-Flow-Induced-Vibrations in Heat Exchanger Tube Bundles: A Review

“…The determination of fluid parameters (fluid density and flow velocity) are quite different when these two methods are used (Feentra et al, 2000). In RAD method (Feenstra et al, 2000, Wright & Bannister, 1970) gamma flux from radiation source which penetrates the test section will be attenuated by different amounts depending upon the average density of the two-phase flow. Void fraction  can be determined by interpolating the average density of the fluid between the benchmark measurements for one hundred percent liquid and gas according to the following equation.…”

Detailed flow and force measurements in a rotated triangular tube bundle subjected to two-phase cross-flow

“…This work was reviewed by Pettigrew and Taylor (1994). Since 1994, several researchers have contributed relevant results, in particular, Feenstra et al (1995Feenstra et al ( , 2002 in Freon 11 two-phase flow, Mann and Mayinger (1995) in Freon 12 two-phase flow, and Nakamura et al (2002), Mureithi et al (2002) and Hirota et al (2002) in steam-water cross-flow. Also, comprehensive studies on vibration of tube bundles subjected to both air-water and Freon 22 two-phase cross-flow were conducted at the Chalk River Laboratories (Pettigrew et al, 2001(Pettigrew et al, , 2002.…”