Author(s): XIONG Sheng, LIU Ming-zhu, JING Jian-ping
Pages: 16-20
Year: 2015 Issue:  5
Journal: Noise and Vibration Control
Keyword:  vibration and wave; heat exchanger; fluid induced vibration; fluid and structure coupling; numerical simulation;
Abstract: The characteristics of flow induced vibration in heat exchangers were discussed. The discussion was mainly focused on the vibration induced by the inner flow of the heat transfer, which causes the whole heat exchanger to shake. The constraint reaction at the heat exchanger’s support was evaluated. Fluid-structure sequential coupling principle was proposed. The commercial software FLUENT was applied to calculate the distribution of the surface pressure. Then, MATLAB code was adopted to process the output fluid pressure data. The output fluid pressure was applied for frequency spectrum analysis. Nonlinear factors were ignored in modeling of the structure. The frequency signal was loaded to the software ANSYS for single frequency harmonic response analysis to obtain the single-frequency restraint reaction force, and the steady response reaction force of the heat exchanger was obtained by superposition of the multi-frequency restraint reaction forces.