Sensitivity analysis of end pressures and flows with respect to a blockage inside a pipeline

Ignacio Rubio Scola (1) , Gildas Besancon (1) , Didier Georges (1) , Marcos Guillén (2) , Jean-François Dulhoste (2) , Rafael Santos (2)

1 GIPSA-SYSCO - GIPSA - Systèmes non linéaires et complexité
2 Dep. Ciencias Térmicas

The present paper is based on the sensitivity analysis of input and output pressures and flows of a pipeline for the detection and location of a blockage in a pipeline. To that end, three ways of modeling a blockage in a pipe have been designed . The first model assumes that the blockage is punctual like an orifice plate placed online in the pipeline. For the second and third model, a longitudinal blockage is assumed along the pipeline. In the second model, it is only considered a reduction of the pipeline cross-section in a particular stretch of the pipeline. In the third model, the blocked segment is modeled by considering two orifice plates and between the plates there is a blocked pipe stretch. These models have four different outputs, pressure and flow rate at the input and pressure and flow rate at the output. The aim of this work is to determine which pair of outputs have the highest sensitivity to the change of blockage position in order to improve the detection and location of the blockage. In this study, the energy for each output and for each position is calculated and the magnitude of the energy variation with respect to blockage position is then obtained. Numerical simulations are presented for the different models.

Mots clés: Blockage; Modeling; Sensitivity analysis; Pipeline

Domaines: Automatique

Ignacio Rubio Scola, Gildas Besancon, Didier Georges, Marcos Guillén, Jean-François Dulhoste, et al.. Sensitivity analysis of end pressures and flows with respect to a blockage inside a pipeline. XII International Congress on Numerical Methods in Engineering and Applied Sciences, Apr 2014, Margarita, Venezuela. pp.n/c. ⟨hal-00933551⟩