Characteristics analysis of pressure wave propagation in liquid-filled pipes

摘要

Considering the fluid pressure and Coriolis force, Centrifugal force and migration force caused by flow velocity, an improved 14-equation model is presented which describes the fluid-structure interaction behavior of thick-walled fluid-filled pipes. Taking into account longitudinal vibration, transverse vibration and torsional vibration, the transfer matrix method (TMM) has been used for numerical modeling of both hydraulic and structural equations. Then the model and algorithms were validated with numerical examples. Based on this model and algorithms, several pipeline schemes were calculated and analyzed with various fluid pressures, flow rates and thicknesses of pipe wall. Furthermore, the influence laws and characteristics of fluid parameters and properties of the structure on the pressure fluctuations and dynamic response of pipeline were discussed.