Zhonghua Gui
YOU?
Author Swipe
View article: Influence of Different Power Factors and Slips on End Temperature Rise of Variable Speed Pumped Storage Machine
Influence of Different Power Factors and Slips on End Temperature Rise of Variable Speed Pumped Storage Machine Open
Relative to the traditional pumped storage machines, the variable speed pumped storage machine (VSPSM) has strong frequency and voltage regulation capabilities by the AC excitation. However, the enhancement of the regulation capability als…
View article: Enhanced High Overall Performance of Solution-Processed Ito/Igo Thin Film Transistor Via Heterogeneous -Bilayer Channel
Enhanced High Overall Performance of Solution-Processed Ito/Igo Thin Film Transistor Via Heterogeneous -Bilayer Channel Open
View article: Analysis of flow and energy dissipation in pump turbine with small guide vane opening
Analysis of flow and energy dissipation in pump turbine with small guide vane opening Open
In this study, a detailed flow state analysis of a reversible pump turbine (RPT) under small guide vane opening conditions was conducted using both numerical simulation and experimental methods on three analysis planes at 0.5 span. The ent…
View article: Research on the performance of pump-turbine during the transition process from pump mode to turbine mode
Research on the performance of pump-turbine during the transition process from pump mode to turbine mode Open
In current engineering, the transition process of pump turbines from pump to turbine mode mainly includes the shutdown process of pump operating and the startup process of turbine operating, and the switching of working conditions mostly d…
View article: Research on Automatic Testing of Pump Turbine Model Test Based on Intelligent Technology
Research on Automatic Testing of Pump Turbine Model Test Based on Intelligent Technology Open
In order to test the performance of pump turbine, it is necessary to collect and analyze the performance indexes such as energy characteristics, stability performance, cavitation performance and force characteristics of the unit through th…
View article: Effect of guide vane closing speed deviation on transition process in pumped storage power plant
Effect of guide vane closing speed deviation on transition process in pumped storage power plant Open
The guide vane closing law is a crucial role in ensuring the hydraulic transients of pumped storage power plant. It is also essential for ensuring the safe operation of pumped storage power plant after long-term operation. Variations in th…
View article: Pressure pulsation of pump turbine at runaway condition based on Hilbert Huang transform
Pressure pulsation of pump turbine at runaway condition based on Hilbert Huang transform Open
Pumped storage is an important component of electrified wire netting. The safe and stable operation of pump turbines is extremely important. Among them, pressure pulsation is one of the main causes of pump turbine vibration. The characteri…
View article: Influence of asymmetric-paths winding on electromagnetic force of variable speed pump storage generator-motor
Influence of asymmetric-paths winding on electromagnetic force of variable speed pump storage generator-motor Open
Stator asymmetric-paths winding of variable speed pump storage (VSPS) generator-motor can solve the problem of mismatch of unit speed, capacity and outlet voltage. However, different winding connection schemes will lead to the change of ma…
View article: High Performance All Oxide Thin Film Transistor With Ink-Jet Printing Metal Oxide Dielectric Pattern
High Performance All Oxide Thin Film Transistor With Ink-Jet Printing Metal Oxide Dielectric Pattern Open
View article: Prediction accuracy improvement of pressure pulsation signals of reversible pump‐turbine: A LSTM and VMD‐based optimization approach
Prediction accuracy improvement of pressure pulsation signals of reversible pump‐turbine: A LSTM and VMD‐based optimization approach Open
The reversible pump‐turbine plays an important role in hydropower stations, but pressure pulsation during their operation affects their performance and lifespan. Accurate prediction of pressure pulsation signals can provide an important ba…
View article: Analysis of the Energy Loss Mechanism of Pump-Turbines with Splitter Blades under Different Characteristic Heads
Analysis of the Energy Loss Mechanism of Pump-Turbines with Splitter Blades under Different Characteristic Heads Open
The operating efficiency of high-head pump turbines is closely related to the internal hydraulic losses within the system. Conventional methods for calculating hydraulic losses based on pressure differences often lack detailed information …
View article: Study on Distribution Law of Gas Phase and Cavitation in the Pressurization Unit of Helical Axial Flow Multiphase Pump
Study on Distribution Law of Gas Phase and Cavitation in the Pressurization Unit of Helical Axial Flow Multiphase Pump Open
Due to the irregular change of gas void fraction (GVF) in multiphase pumps, the pressure distribution in the pump is often uneven, which leads to the formation of low-pressure area and thus the occurrence of cavitation. In order to study t…
View article: Numerical Investigation of Gas-Liquid Flow in a Multiphase Pump with Special Emphasis on the Effect of Tip Leakage Vortex on the Gas Flow Pattern
Numerical Investigation of Gas-Liquid Flow in a Multiphase Pump with Special Emphasis on the Effect of Tip Leakage Vortex on the Gas Flow Pattern Open
In this paper, the gas-liquid flow is comprehensively analyzed under different inlet gas void fractions, and the effect of tip leakage vortex (TLV) on the gas flow pattern in multiphase pumps is revealed. The results show that the gas flow…
View article: Effect of the Diameter of Pressure-Balance Pipe on Axial Hydraulic Thrust
Effect of the Diameter of Pressure-Balance Pipe on Axial Hydraulic Thrust Open
The axial hydraulic thrust has great influence on the safety and stability of a pump turbine. A common way to balance hydraulic thrust is to install a pressure-balance pipe, and the change in pipe diameter is one of the important factors a…
View article: Discussion on the Issues of Rotor-Stator Interference in Pump Turbine
Discussion on the Issues of Rotor-Stator Interference in Pump Turbine Open
There are serious vibration issues of powerhouse in some pumped storage power plants and it affects severely the safe and stable operation of power plant. In order to settle the issues which have troubled the hydropower technology for seve…
View article: Numerical simulation of solid-liquid two-phase flow in a centrifugal pump with different wear blades degree
Numerical simulation of solid-liquid two-phase flow in a centrifugal pump with different wear blades degree Open
Based on the SST liquid turbulence model, using the Euler-Lagrange method to simulate solid-liquid two-phase flow in the centrifugal pump with different degree of wear blades. When the pump was transporting silt-laden flow, numerical simul…
View article: Numerical prediction of hydraulic performance in model and homologous prototype Pelton turbine
Numerical prediction of hydraulic performance in model and homologous prototype Pelton turbine Open
Pelton turbine is widely used in in utilizing the high water head resource. The multiphase flow in the Pelton turbine is too complex to be analysed detailed as the flow in the reaction turbines. So the hydraulic design of Pelton turbine wa…
View article: Numerical analysis of a Pelton runner water sheet flow under super-high head
Numerical analysis of a Pelton runner water sheet flow under super-high head Open
The hydraulic performance of Pelton turbine is different from reaction turbines due to its unsteady flow of rotating buckets with time and space. The water sheet flow in Pelton turbine is also very complex as the jet flow is often interact…
View article: Study on internal flow field simulation accuracy of centrifugal impellers based on different meshing types
Study on internal flow field simulation accuracy of centrifugal impellers based on different meshing types Open
Meshing is an important preprocessing part of numerical simulation for water pump, which has important influence on numerical results. In order to simulate internal flow field in water pump more accurately, three different types of grids w…