Abstract: Particle image velocimetry (PIV) technology, which performs the full-field velocity measurement on the laser plane, plays a crucial role in studying complex flow structures in multistage centrifugal pumps. In particle image ...

Abstract: Abstract. In high-speed reversible pump-turbines, tandem cascade flow instability under off-design low-flow (LF) conditions severely restricts the performance of pumped storage units, leading to efficiency loss, vibration ...

Abstract: A novel planar ball reducer (NPBR) is invented in which the relative velocity of meshing surfaces is reduced to achieve high mechanical efficiency. In order to acquire an accurate quantitative analysis on the efficiency ...

Abstract: Surface fatigue resulting from cyclic contact loading is a main reason for the rough surface wear. Since a rough surface consists of many asperities, the fatigue in one asperity is investigated. The multiaxial Fatemi–Socie ...