Amplitude–Frequency Analysis of High-Pressure Pulses in the Confuser of a Complex Technological Pipeline

Abstract

Methods of estimating the vibrational effect of high-pressure pulses on the confuser of the complex technological pipeline have been presented. Hydrodynamic calculations are performed using the Ansys Fluent software package. To analyze the propagation of high-pressure pulses, time series of hydrodynamic variables have been constructed at several points of the model confuser located on the axis of the pipeline. Two linear stationary hydrodynamic models of the confuser have been constructed, and the possibility of their use in modeling the nonstationary propagation processes of high-pressure pulses has been studied. It has been established that, with an accuracy of more than 90%, the studied unsteady hydrodynamic processes in the confuser can be described by linear stationary models. An analysis of the amplitude–frequency characteristics of the confuser using these models showed that an approximately 100-bar impact on the confuser of pressure pulses is permissible and leads to pulsations of pressure with a signal-to-noise ratio of 110 dB, which does not exceed the maximum permissible level of pressure pulsations.