Structural and vibration analysis considering the flow velocity of the heat exchanger

This study is about the heat exchanger which is serpentine type with rectangular shell. A few heat exchangers have vibration problems caused by velocity of flow, piping vibration and Karman vortex. The cracks occur on pipe wall and Heat exchanger is damaged. Vibration analysis is conducted to prevent pipe damage during the design. But the other problems are caused after analysis of vibration. It is essential to estimate exact velocity value in order to predict the effect of flow induced vibration and heat transfer characteristic. Therefore in this paper, the vibration and static analysis have been measured and analyses for pipes and curve. Also modal test is conducted for analysis of natural frequency and methodology for the velocity prediction. By comparison between the hot testing and analysis results, the 1D calculation could be verified its reliability. It is necessary to optimally designed to avoid resonance by changing the diameter of the flow velocity of the change and piping, when the resonance avoidance cannot be avoided, be advanced design in the direction of reducing the amplitude such as through reinforcement work of the high contribution part shall.