Author(s): Goran Pavic, Fabien Chevillotte
Linked Author(s): Goran Pavic
Keywords: Pipe dynamics, wave motion, strain sensor, transient measurement
Abstract: Basic features of dynamics of fluid-filled pipes are summarised first. The fluid-wall coupling is discussed in some detail. Different circumferential pipe modes and the associated cut-on frequencies are addressed from theoretical as well as practical point of view. It is shown that advanced measurements require complementary analytical pipe modelling. Advantages of the use of a particular non-intrusive sensor for the detection of pressure pulsations are outlined. The sensitivity of the sensor, which depends on the frequency dependent fluid-structure coupling, is obtained by modelling. The main originality is the use of a filtering technique to reconstruct the pressure pulsation in the time domain. This in turn enables the capture of transients occurring at frequencies above 0. 5 Hz. It is shown how the reconstruction of dynamic pressure along the pipeline can be obtained from a localised multi-sensor array. Several measurements done at a small hydropower plant are presented to demonstrate different techniques of multi-sensor analysis
Year: 2017