A5045750227- Cavitation Phenomena in Pumps
- Hydraulic and Pneumatic Systems
- Erosion and Abrasive Machining
- Hydraulic flow and structures
- Fluid Dynamics and Heat Transfer
- Water Systems and Optimization
- Fluid Dynamics Simulations and Interactions
- NMR spectroscopy and applications
- Robotic Mechanisms and Dynamics
- Fluid Dynamics and Mixing
- Wind Energy Research and Development
- Computational Fluid Dynamics and Aerodynamics
- Cellular and Composite Structures
- Tribology and Lubrication Engineering
- Advanced Algorithms and Applications
- Soft Robotics and Applications
- Heat transfer and supercritical fluids
- Robot Manipulation and Learning
- Ultrasound and Cavitation Phenomena
- Hydrocarbon exploration and reservoir analysis
- Oil and Gas Production Techniques
- Vibration Control and Rheological Fluids
- Particle Dynamics in Fluid Flows
- Lubricants and Their Additives
- Power Systems and Renewable Energy
Hohai University
2008-2024
China University of Petroleum, East China
2022-2024
Xuchang University
2011-2024
China Institute of Water Resources and Hydropower Research
2011
A novel star-shaped cellular structure with great elastic properties is proposed as candidate for multiple morphing applications. Theoretical derivations and finite element analysis are conducted to study the mechanics of structure. Results show that in-plane moduli can be extremely lower than those base material, while maximum global strains reach, dozens times, limit strain material. The also exhibits lighter weight, larger ratios existing semi-sinusoidal structure, which indicates...
Abstract The needle in the jetting mechanism of Pelton turbine may be uneven on surface due to knife marks cutting process or erosion sediment water flow, resulting roughness needle, which affects flow at wall. In order study influence jet characteristics, characteristics and under different roughnesses were analyzed this paper. results show that smooth wall rough are obviously contrasted. With increase roughness, velocity gradually decreases, turbulent kinetic energy increases, shear stress...
The utilization of pump as turbines (PATs) within water distribution systems for energy regulation and hydroelectricity generation purposes has increasingly attracted the field players’ attention. However, its power production efficiency still faces difficulties due to PAT’s lack flow control ability in such dynamic systems. This eventually led introduction so-called “variable operating strategy” or VOS, where impeller rotational speed may be controlled satisfy system-required conditions....
To improve the bidirectional power performance of a tidal unit, two designs were investigated. The use unilateral or double guide vanes in tubular unit influences hydraulic unit. Based on N-S equations and RNG k-ε turbulence model, SIMPLEC algorithm was used for 3D steady-state numerical simulation entire turbine flow passage with vanes. internal condition under positive reverse generation conditions also analyzed. At same time, turbine, runner 1.6 m diameter, scaled down to 0.35 diameter...
The shaft tubular turbine is a form of tidal power station which can provide bidirectional power. Efficiency an important performance indicator. To study the influence runner design parameters on efficiency, complete 3D flow-channel model was developed, contains runner, guide vanes, and flow passage integrated with hybrid grids calculated by steady-state calculation methods. Three aspects core component (turbine runner) were optimized numerical simulation. All results then verified...
Due to the uneven distribution of water resources, there are many diversion projects around world, such as South-to-North Water Diversion Project in China, especially some plain areas. To transfer from low high areas, large low-head pumps have been widely used. The transition process pumping station is mainly caused by sudden change flow velocity and pressure fluid pipeline system start-up shutdown processes. previous research has based on one-dimensional characteristic line method. However,...
In the shaft axis monitoring of hydrogenerating unit condition and fault diagnosis, orbit is intuitive comprehensively reflects operation state, different orbits correspond to types, which can accurately indicate a system vibration fault. Shaft identification has important significance for diagnosis. getting feature extraction pattern recognition orbit, Zernike moment better than Hu moment; it advantages small calculation error high rate. A rough set neural network (RS‐BP hybrid model)...
The accumulation of oil mist in the thrust bearings poses a threat to safety unit, leading financial and environmental losses. To investigate generation influencing factors tank bearing pumped-storage power station, novel numerical simulation method is proposed for calculating oil–oil mist–air multi-phase flow based on VOF model, RNG k−ε turbulence Lee model. method’s reliability verified using field operation data. effects rotational speed pad temperature formation inside were examined from...
The bulb tubular unit has advantages over other units in the low head, large discharge, and tidal energy. development utilization of head ultralow hydraulic resources can increase runner’s energy parameters, make up for defects size speed unit, reduce construction investment. turbine’s operation stability structural strength are compared analyzed by orthogonal test method to improve perfomance turbine. results show that optimal design scheme be obtained when number guide vane is 16, distance...