A5036872201- Cavitation Phenomena in Pumps
- Hydraulic and Pneumatic Systems
- Water Systems and Optimization
- Hydraulic flow and structures
- Fluid Dynamics and Turbulent Flows
- Oil and Gas Production Techniques
- Fluid Dynamics and Vibration Analysis
- Lattice Boltzmann Simulation Studies
- Computational Fluid Dynamics and Aerodynamics
- Wind Energy Research and Development
- Cyclone Separators and Fluid Dynamics
- Turbomachinery Performance and Optimization
- Fluid dynamics and aerodynamics studies
- Particle Dynamics in Fluid Flows
- Rocket and propulsion systems research
- Vibration and Dynamic Analysis
- Fluid Dynamics Simulations and Interactions
- Hybrid Renewable Energy Systems
- Energy Load and Power Forecasting
- Combustion and flame dynamics
- Fluid Dynamics and Heat Transfer
- Ship Hydrodynamics and Maneuverability
- Erosion and Abrasive Machining
- Mechanics and Biomechanics Studies
- Maritime Transport Emissions and Efficiency
Hohai University
2015-2024
Saint Anthony College of Nursing
2020
University of Minnesota
2020
As a low-cost scheme for small-scale hydropower generation, pump as turbines (PATs) are used at different hydrosites around the world. Nevertheless, big number of recently conducted studies on PAT performance have mainly focused centrifugal type, despite fact that axial-flow type has comparatively large flow capacity, thus disposing higher power density. Therefore, this article seeks to investigate dynamics an and associated energy loss characteristics, under both turbine operating modes. It...
Air-core vortices are a ubiquitous phenomenon in the intakes of hydropower stations. Due to transient and instability two-phase vorticial flow, prediction air-core vortex formation is challenging, understanding mechanism remains elusive. In this study, large eddy simulation (LES) method coupled level-set volume-of-fluid (CLSVOF) performed study benchmark reservoir with horizontal intake pipe. The process can be classified into an inception stage, stability stage. surface repeatedly goes...
Abstract Tip leakage flow (TLF) is a typical phenomenon in the internal of axial-flow pumps that has serious impact on their safety and stability. In this study, numerical simulations are performed to investigate influence various tip clearances operating conditions characteristics vortex (TLV) energy loss prototype vertical pump. First, based entropy production theory, TLV-induced quantitatively studied. The rate caused by turbulence dissipation (EPTD), which pulsating velocity, contributes...
Inside the pump-turbine, energy is irreversibly lost due to turbulent pulsations in high Reynolds number zone and actions of viscous forces close wall. The conventional differential pressure method cannot obtain specific details hydraulic loss within machine’s flow passages; on other hand, entropy production can provide accurate information location irreversible losses spatial distribution dissipation. Therefore, based theory, this study investigates composition under different conditions...
The phenomenon of rotating stall in centrifugal pumps is closely associated with the evolution blade boundary layer. Aiming to accurately predict characteristics layer, this study investigates pump impellers using gamma (γ) transition model. accuracy numerical simulation was confirmed by comparing its conclusions results testing. In calculations considering characteristics, distribution low-pressure areas inside impeller relatively discontinuous, while pressure more uniform. However, without...
The flow around airfoil is a significant topic due to the complexities associated with separated structures and fluctuating forces. This study investigates transition vortex evolution for symmetric within range of Reynolds number Re=800–2000 angle attack AoA=18∘–26∘. A series numerical simulations are performed using well-validated level-set based immersed boundary method. effects increasing Re AoA on near-profile examined comprehensively through various physical results from time-averaged,...