The static and dynamic stresses of a bulb tubular turbine unit were analyzed through Ansys. The 3D unsteady flow through the bulb tubular turbine was simulated by CFX to predict the hydraulic pressure on the key parts. The stresses in the key parts under typical work conditions were calculated. The results showed that the dynamic stresses in the runner and guide vane mainly relate to RSI effects. The dynamic stresses showed that the bulb tubular turbine unit was designed safely, and the results presented a reference to the unit during designed stage.

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