Flow-induced vibration of tube bundles considering the effect of periodic fluid force in a rotated triangular tube array

This paper investigated the flow-induced vibration of tube bundles considering effect periodic fluid force in a rotated triangular array. We first performed an experiment to obtain responses array with pitch-to-diameter ratio P/D = 1.48. To further investigate characteristics bundles, mathematical model and clearance restriction was developed. Based on Computational Fluid Dynamics calculation, coefficients Strouhal numbers were determined. Considering force, calculated. The induced by discussed. results demonstrated that some complex vibrations such as beat resonance may be array, frequency has significant influence before fluidelastic instability.