A5025572480- Cavitation Phenomena in Pumps
- Hydraulic and Pneumatic Systems
- Hydraulic flow and structures
- Water Systems and Optimization
- Wind Energy Research and Development
- Particle Dynamics in Fluid Flows
- Erosion and Abrasive Machining
- Fluid Dynamics and Heat Transfer
- Cyclone Separators and Fluid Dynamics
- Turbomachinery Performance and Optimization
- Coal Combustion and Slurry Processing
- Solar-Powered Water Purification Methods
- Fluid Dynamics and Turbulent Flows
- Membrane Separation Technologies
- Oil and Gas Production Techniques
- Fluid Dynamics Simulations and Interactions
- Rocket and propulsion systems research
- Wind Turbine Control Systems
- Fluid Dynamics and Vibration Analysis
- Computational Fluid Dynamics and Aerodynamics
- Membrane-based Ion Separation Techniques
- Aerodynamics and Fluid Dynamics Research
- Wave and Wind Energy Systems
- Aerosol Filtration and Electrostatic Precipitation
- Icing and De-icing Technologies
Tsinghua University
2015-2024
Renji Hospital
2024
Shanghai Cancer Institute
2024
Xihua University
2018
Lund University
2011
South China University of Technology
2007
Unsteady flow phenomena like rotating stall frequently occur in centrifugal pumps under off-design conditions. Rotating could lead to instabilities and pressure pulsation, which affect the normal operation of pumps. The mechanism has not been sufficiently understood previous researches. In this study, impact impeller on pump stability pulsation is numerically investigated. This paper aims detect unsteady characteristics inside by computational fluid dynamics technology, analyze pulsations...
Tip clearance is the distance required between blade tip and pump body wall of an impeller in a helicon-axial multiphase pump, which tends to induce leakage flow. The vortex formed by interaction flow with mainstream can seriously affect performance pump. To minimize adverse effects method design squealer on proposed this paper. effect external characteristics, energy dissipation analyzed. Research results indicate that effectively improve hydraulic efficiency At optimal point, head...
Unlike the reaction turbines, hydraulic performance of Pelton turbines varies due to unsteady flow rotating buckets in time and space. This study experimentally numerically investigates dynamic a turbine at five different operating conditions. The numerical simulations were performed with SST turbulence model. three-dimensional free surface sheet behavior was modeled by two-phase homogeneous model used analyze patterns torque variations as rotated. predicted unit discharge rates are compared...
After long-term operation, the material loss due to slurry erosion often leads significant changes in impeller geometry. This change can, turn, affect flow characteristics and mechanism a centrifugal pump. To investigate this matter, we consider two geometric models based on prototype stainless steel impeller, which failed huge problems from pulp slurry. These are different degree of wear, with one model at pre-erosion stage other worn blades. For both models, have been obtained Eulerian...
Purpose Numerically analyzed the flow characteristic and explored hydrodynamic mechanism of pump mode hump district formation a Francis pump-turbine. Design/methodology/approach Numerical simulations were conducted entire pump-turbine passage under different discharge conditions by adopting SST-CC turbulence model. The internal at has been explained in detail combined with model test this paper. unsteady pressure fluctuation characteristics are analysed five nearby region. reason is...
The sediment erosion of Pelton turbine components is a major challenge in the operation and development high-head water resources, especially mountainous areas with high yield. In this paper, study using numerical simulation was conducted different particle sizes fine sand range. And mechanism injector analyzed. Eulerian Lagrange method adopted to simulate gas–liquid–solid flow. Mansouri’s model applied estimate erosion. predicted results were accord field photographs. particular,...