Response of multiple bend system to multiphase flow
conference paper
Multiphase flow can induce high amplitude vibrations in piping systems. Several experimental campaigns focused on the force spectrum on a single bend. To evaluate the evolution of the forces from bend to bend, experiments have been done on an airwater, one inch pipe system consisting of six bends at nearatmospheric conditions. In a first phase, all individual bends were clamped to measure the phase relation and correlation of the flow-induced forces on the subsequent bends. In a second phase, all clamps were removed to measure the free vibrations. In this paper which focusses on the phase 2 results, the vibration measurements were compared to the calculated vibrations. For the excitation forces and phase relations, the measured force spectra from phase 1 are used. Damping values are based on experimental results from phase 2. The results show a good match between modeled and measured vibrations levels. Including the measured correlation between forces at multiple bends, improves the modeled results for slug flow cases. It is possible to directly use extract damping values from the measured signals, however, robustness of the damping estimation needs to be improved.. Using average damping values currently leads to the best match.
Topics
TNO Identifier
960862
Publisher
American Society of Mechanical Engineers ASME
Article nr.
OMAE2021-62506
Source title
Proceedings of the ASME 2021 40th International Conference on Ocean, Offshore and Arctic Engineering, OMAE2021, June 21-30 2021, Virtual, Online
Collation
9 p.
Place of publication
New York City, NY, USA
Files
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