Vibroacoustic monitoring is an emerging technique for the detection of leaks and third party interference (TPI) on fluid transportation pipelines. The technique is based on the remote identification of fluid transients and pipe shell vibrations produced by the interaction with the pipe and with the flow, and transmitted through the conduit. The system performance is a function of the thermodynamic properties of the fluids, that can be mainly separated in liquids, gases, and multiphase mixtures. While liquids are considered incompressible, gases and multiphase mixtures can sustain strong volume variations, thus producing variable flow regimes along the pipeline. We analyze here pressure transients propagation in gas filled pipelines. We have run field test campaigns in many scenarios, at different pressures, with and without flow, also in operational conditions, generating controlled interactions with the infrastructure and collecting vibroacoustic signals with a proprietary network of monitoring stations placed along the pipeline. We process the data in order to derive pressure transients propagation parameters and detection distance, to characterize the source wavelet with respect to the interference action (leak, impact, etc.), to analyze the effects of flow and turbulence, to validate mathematical models, and finally to design and calibrate advanced procedures for real time pipeline monitoring.
Vibroacoustic Monitoring of Gas-Filled Pipelines
BERNASCONI, GIANCARLO;DEL GIUDICE, SILVIO
2013-01-01
Abstract
Vibroacoustic monitoring is an emerging technique for the detection of leaks and third party interference (TPI) on fluid transportation pipelines. The technique is based on the remote identification of fluid transients and pipe shell vibrations produced by the interaction with the pipe and with the flow, and transmitted through the conduit. The system performance is a function of the thermodynamic properties of the fluids, that can be mainly separated in liquids, gases, and multiphase mixtures. While liquids are considered incompressible, gases and multiphase mixtures can sustain strong volume variations, thus producing variable flow regimes along the pipeline. We analyze here pressure transients propagation in gas filled pipelines. We have run field test campaigns in many scenarios, at different pressures, with and without flow, also in operational conditions, generating controlled interactions with the infrastructure and collecting vibroacoustic signals with a proprietary network of monitoring stations placed along the pipeline. We process the data in order to derive pressure transients propagation parameters and detection distance, to characterize the source wavelet with respect to the interference action (leak, impact, etc.), to analyze the effects of flow and turbulence, to validate mathematical models, and finally to design and calibrate advanced procedures for real time pipeline monitoring.File | Dimensione | Formato | |
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