The ship discharging pipe has characteristics of short discharging period

high thermal shock energy and large fluctuation load

which directly affect safe and steady operation of a steam accumulator. In this study

typical ship steam accumulator discharging pipe is taken as the prototype. Turbulent fluctuation is analyzed by using the standard k-ε equation. The hydrodynamic characteristics for ship steam accumulator discharging pipe are calculated by CFD simulation method. Velocity

pressure

turbulence kinetic energy and wall shear distributions are obtained. Based on the prediction mechanisms of thermal shock generated by flow induced vibration

shock energy pictures closely related to flow induced vibration are revealed. The calculated results show that during mixed flow of high temperature and pressure steam

high velocity

severe turbulence fluctuation and large wall shear occur around T-junction. Based on steam thermal shock energy pictures

thermal shock energy is higher at the elbow and T-junction

while the maximum shock energy occurs at the T-junction for discharging pipe. These calculated results predict that thermal shock damage for T-junction is more serious. The actual test data for T-junction demonstrate the numerical prediction results.