Flow Induced Vibration Analysis of Multi-Span Supported Tube

Abstract

Flow induced vibration around the tube is a critical phenomena in shell and tube heat exchanger. In present work, the ow induced vibration mechanisms have been studied to understand the behavior of ow induced vibration in multiple supported tube. Free vibration analysis has been carried out to nd natural frequency for both single span as well as multi-span tube and for each of the natural frequency the corresponding mode shapes plotted. Computational uid dynamics approach has been used to study velocity distribution, pressure distribution, vorticity magnitude etc. The drag coe cient values at di erent Reynolds number obtained around the single tube. Strouhal frequency values are obtained from fast fourier transform analysis using extracted lift data. Harmonic force is calculated by incorporating the drag coe cient and Strouhal frequency values. Forced vibration analysis has been done to observe the vibration response of the tube by applying dif erent harmonic forces. Vibration response of the multi span tube with varying span length is observed too.