Analysis For Flow-Induced Vibration Damage In Heat Exchanger Based On Loosely Fluid-Structures Interaction Method

As the phenomenon of flow-induced vibration damage increases with the heat exchanger which have poorer tube bundles rigidity and faster shell side flow velocity, the research of flow-induced vibration in heat exchangers becomes an important issue nowadays.The flow-field distribution of shell side was simulated with porous medium model and block meshing method. By the simulation results of shell side flow velocity, the fluid force that tubes bear were calculated and load on the tube FEA beam model. The results show that flow-induced vibration caused titanium condenser tube resonate. Heat exchanger tube was fatigue-damaged as it reaches the stress fatigue limited.Based on loosely Fluid-Structures Interaction (FSI) method analyzed the flow around elastic supported cylindrical problem and got a well result. After that, with the software of MpCCI, the flow force which is calculated by FLUENT was transmit to the tube model, obtained the maximum stress and its location. By the tube stress comparison between FEA method and FSI method showed that the FSI method is feasible.