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Simulation of cross-flow-induced vibration of
tube bundle by surface vorticity method |
| WANG Fenghao1, JIANG Gedong2, Lin John Zhang3 |
| 1.School of Human Settlements and Civil Engineering, Xi'an Jiaotong University; 2.School of Mechanical Engineering, Xi'an Jiaotong University; 3.Division of Building Science and Technology, City University of Hong Kong; |
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Abstract A fluid-structure interaction model based on Surface Vorticity Method (SVM) was used to study flow-induced vibrations of tube bundles in medium space ratio. The flow-induced vibrations of four tubes in a rotated square and a staggered tube bundle in three-row and five-column arrangements were simulated in the high sub-critical Reynolds number (Re) range. The results on fluid forces, tube responses and vorticity maps were presented. The vorticity maps of the four rotated-square tubes changed dramatically when the rigid tubes were replaced by the flexible tubes. From the vorticity maps and vibration responses of the staggered tube bundle of different structural parameters, it was found that with the decrease of tube natural frequency, the maximal vibration response moved from the third row to the first. The results also showed that when more flexible tubes are used, the flow pattern changed drastically and the fluid-structure interaction imposed a dominant impact on the flow.
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Issue Date: 05 September 2008
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