Fluid-Structure Interaction Vibration Response Analysis of the Hydrocyclone under Periodic Excitation

Abstract

Considering that the hydrocyclone will be affected by internal and external fluid forces in practical work, the numerical simulation method of fluid-structure interaction(FSI) of the hydrocyclone is proposed, and the finite volume method is used in the fluid domain and the finite element method is used in the solid domain. According to the numerical simulation of the flow around a circular cylinder, the magnitude and frequency of fluid flow around the hydrocyclone are obtained. On this basis, the numerical simulation and experimental research of the hydrocyclone are carried out, and the vibration characteristic of the hydrocyclone under the FSI condition is discussed, which the modal frequencies and modes of the hydrocyclone, the structural displacement and stress distribution characteristics of the FSI interface under periodic excitation are obtained. The results of numerical simulation and measured are compared and analyzed. The distribution trend and position of the maximum acceleration values are in good agreement between the measured and numerical simulation. The maximum deformation and the maximum acceleration values position of the hydrocyclone structure which is near the intersection between small conical section and tail pipe, and the structural deformation and maximum acceleration values of the hydrocyclone increase with the increase of inlet velocity. The analysis shows that the FSI model of the hydrocyclone is reasonable. Moreover, the influencing factors of fluid flow around the hydrocyclone should be considered in the future design and application of the hydrocyclone.