Zhenggui Li

TL;DR: In this paper, a 3D incompressible simulation using the shear stress transition (SST) k-ω turbulence model was performed to achieve the flow mechanism during the closure of the guide vanes in a pump-turbine in pump mode.

TL;DR: In this article, unsteady numerical simulations were carried out in the pump mode of a pump-turbine at using the shear stress transport (SST) k-ω turbulence model.

TL;DR: This study presents a comprehensive review of related experimental studies, novel numerical methods and strategies along with transient characteristics and formation mechanisms in hydraulic-machine systems and suggestions have been made concerning the selection of simulation methods.

TL;DR: In this article, the authors investigated the influence of the clearance flow on the simulation of load rejection process, and the results indicated that the accurate simulations of the fluctuating performance characteristics and the unsteady vortex flows in the pump-turbine are significantly influenced by the clearance flows between the runner and the stationary parts during the load rejection transient process.

TL;DR: In this article , the surface pressure pulsation characteristics of the shaft end sealing membrane under different flow operating conditions of the centrifugal pump were investigated. But the results were limited to the case of a single blade sweeping the volute separating tongue.