Computational and experimental studies of a pressure pulsation damper for pipeline systems

Abstract

A generalized-structure analytical model of a pressure pulsation damper for pipeline systems is presented. The model was obtained using the four-pole method. The model is obtained in lumped and distributed parameters. The distributed-element model and finite element model are used for calculating the inherent characteristics of the pressure pulsation damper. The analytical distributed-element model takes into account the distribution parameters of the central inertial channel by introducing into the analytical model a matrix for the distributed element instead of the matrix of inertial resistance. A finite element parametric model of a two-stage reactive-type oscillation damper is developed in the Ansys software. Pulsation processes in the damper are modeled using acoustic analysis. The frequency-dependent coefficients of the damper transfer matrix are calculated for three models using three numerical experiments with a section of the pipeline system with the dynamic characteristics known in advance. The characteristic parameters of the pressure pulsation damper are calculated. These are the wave input impedance, wave output impedance and the inherent vibration damping. The calculation was carried out using analytical and finite element models. A single-stage reactive pressure pulsation damper is developed. The damper is designed in such a way that its settings such as the resistance of the jets and resonance tubes, the length of the central channel and the capacity of the expansion cavity can be changed. The results of experimental and numerical research of the inherent characteristics of a single-stage reactive of a vibration damper are presented.

Keywords

• vibration damper
• pressure
• pulsations
• mathematical model
• software ansys