Theoretical and numerical study on flow-induced vibration of exhaust tower in a cryogenic wind tunnel
The flow-induced vibration response of the exhaust tower was analyzed by theoretical and numerical simulation methods to investigate the structural safety of the exhaust tower under the combined action of natural wind load and internal flow.The exhaust tower's co-current response and mean response under the action of wild wind load were achieved.Then,using the computational fluid dynamics approach,shear stress transport(SST)k-ω turbulence model and dynamic mesh numerical technology,the exhaust tower's two-way fluid-structure interaction numerical simulation was realized.The exhaust tower's velocity,pressure,and vorticity distribution under the action of internal and external flow mixing were also obtained.The vortex shedding frequency of the exhaust tower under a specific wind load was close to the first-order modal frequency of the structure.The gained stress was within the allowable stress range of stainless steel.
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