The condenser tube bundle may experience steam flow-induced vibration under the flowing across from high-speed steam.A comprehensive evaluation of the steam flow-induced vibration for the tube bundle is of great safety significance for ensuring the safe operation of the unit.In this paper,the numerical simulation method wasused to simulate the steam flow field at the throat and shell sides of one nuclear power unit condenser under several operating conditions.Then,based on the steam flow fields in the condenser,Maximum Allowable Spanand Critical crossflow velocity were used to evaluate the steam flow-induced vibrationfor the tube bundle.The results showed that for the studied nuclear power plant condenser,the mid-section of the tube bundle near the shell wall of the condenser in the axial direction of the tube bundlewas a hazardous area prone to steam flow-induced vibration.On the cross-section of the tube bundle,the cooling tubes on the outer layer of the"branch"channels above the tube module near the shell wall were highly susceptible to steam flow-induced vibration.And HP heater drainage condition would increase the likelihood of steam flow-induced vibration in the tube bundle module nearthe flasher.
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