High pressure multiphase induced vibrations: influence pipe orientation
conference paper
Three experimental campaigns were done at an industrial-scale test site to measure the influence of pressure on the forces induced by multiphase flow in process piping. For these different campaigns, measurements were done at 10, 25, 45 and 80 bar, involving different fluids (natural gas, MEG, oil, CO2) and different orientation of the test section with regards to gravity (horizontal and vertical). During the experiments, the vibrations were measured at a large range of flow conditions and regimes. In this paper, the results obtained for the latest campaign are described. The main goal of this campaign was to study the sensitivity of the measurements to the orientation of the test section with regards to gravity. It was observed that the vibration amplitude at 80 bar is much lower than at 10 bar at similar gas and liquid rates. This reduction can be attributed to a generally lower hold-up and lower unsteady hold-up variations at higher pressures, due to the higher gas shear forces and the resulting lower slip. At the test conditions, no effect of pipe orientation was observed for in-plane vibrations. The out-of-plane vibrations were much lower in vertical orientation compared to the horizontal orientation at lower pressures. At higher pressures, these differences disappeared, which is connected to a better mixing of the flow.
TNO Identifier
978016
Source title
12th International Conference on Flow-induced vibration, 5-8 July 2022, Paris-Saclay, France
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