Numerical Investigation of Flow and Structural Characteristics of a Large High-Head Prototype Pump–Turbine during Turbine Start-Up

Transient processes that occur in pumped storage power plants can cause high-pressure conditions, which turn result vibrations the pump–turbine structure and even damage to structural components. It is therefore crucial research transient process of large units flow-induced The three-dimensional flow field models a high-head prototype were constructed study its characteristics under turbine start-up. Calculations analyses performed on pressure variation stress concentrations during start-up mode. simulated distributions mapped onto finite element calculation model structures calculate concentrations. This provides reference improve design operation pump–turbines based findings characteristics.