Experimental study and numerical analysis of fluid-structure coupling vibration characteristics for the reciprocating compressor pipeline

Abstract

The fluid-structure coupling has been one of the hot issues of academic research in recent years, the achievements in various fields of study also emerge in an endless stream, but on the current research status, The study of fluid structure interaction in the field of dynamic equipment, especially compressor, is not very common. With the development of industrial compressors in the direction of large-scale and high-parameters, the analysis of coupling characteristics represented by fluid-solid coupling can evaluate the safe and stable operation of the system, and the evaluations are ofen more close to the actual situation. Therefore, it has gradually been valued. Through the comparison and analysis of the vibration test system of the reciprocating compressor before and after the pipeline inflation, the vibration response caused by the coupling factor is obtained, for the correctness verification of the fluid-structure coupling simulation. the numerical model of the experimental system is established based on ANSYS WORKBENCH, and the boundary conditions of the model are simulated by the experimental data, verified the feasibility of simulation program. Finally, the effects of medium density, pressure, flow rate, elastic modulus of pipe and Poisson’s ratio on fluid solid coupling vibration are discussed by using the verified simulation model. The results show that the medium density, dynamic fluid flow rate and pipe Poisson’s ratio have relatively little influence on the fluid-solid coupling vibration of the pipeline, while the medium pressure and the elastic modulus of the pipe have a great influence.