MODELO MATEMÁTICO PARA EL ESTUDIO DE LA EXPULSIÓN DE AIRE AL FINAL DE UNA CONDUCCIÓN. ANÁLISIS DE SENSIBILIDAD DE LOS PRINCIPALES PARÁMETROS

Abstract

The operations which consist in filling and emptying pipe systems involve the movement of big quantities of water and air. This kind of operations, as the possible fluid pressure alterations during the normal operation of the installation are some of the possible causes that may provoke the presence of trapped air. The air pocket presence in the system makes more difficult the study of the transient because the theoretic model must include the equations related to the water column and the ones related to the air pocket. In this kind of transients there are some unknown parameters. The realisation of this sensitivity analysis has been possible thanks to an important work laboratory results. In this work a big quantity of air expulsion tests at the pipe end has been done. In this document a sensitivity analysis is presented which is capable of fixing the values range of the principal parameters. With this sensitivity analysis it is possible to study the influence of each parameter in the transient final result. Keywords: Expulsion, air, trapped, water, pipe, parameters, model, analysis, sensitivity.