Créé le : 31/01/2019
The sizing of relief safety valves is crucial for pressure vessels and piping equipment and it can be sensitive to working conditions. Understanding the flow dynamic through the valve becomes the only way to predict their behavior Under different operating conditions. This study consists of two complementary parts. A first experimental step focuses on the influence of the geometrical characteristics of the valve (ring position) and operating conditions (free or full cavitation). The second step describes the numerical modeling developed to simulate the single phase flow through the valve. The behavior of turbulence models available in the standard CFD software is explained, particularly the effect of the viscosity limiter near the stagnation point of the valve. Finally, a post-processing method is proposed to evaluate the possible location of cavitation appearance starting from results of single-phase simulations.
Lien vers le site de l'éditeur : https://hal.archives-ouvertes.fr/hal-01651475