Wuyi Wan
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View article: Breaking Kirchhoff's Law in Nonlinear Thermal Emission
Breaking Kirchhoff's Law in Nonlinear Thermal Emission Open
Thermal radiation is strictly governed by Kirchhoff s law to reach thermal equilibrium. The violation of Kirchhoff s law decouples nonreciprocally the equity between absorptivity and emissivity, enabling exotic thermal engineering applicat…
View article: Research Progress of Safety Assessment Technology of Pressure Vessel Pipeline with Defects
Research Progress of Safety Assessment Technology of Pressure Vessel Pipeline with Defects Open
Pressure vessel is widely used in the energy industry, military industry, scientific research and many other fields, the importance of its safe operation is self-evident, the safety of pressure vessel and pipeline has been an important res…
View article: Integrated learning model for water intake capacity of Tyrolean weirs under supercritical flow
Integrated learning model for water intake capacity of Tyrolean weirs under supercritical flow Open
Tyrolean weir can be used as an effective solution to address floatation and sediment deposition in runoff hydropower stations. To improve the efficiency and accuracy of calculating this structure's water intake capacity. The integrated le…
View article: Combustion characteristics and mechanism of hydrothermally aged asphalt in underwater tunnels
Combustion characteristics and mechanism of hydrothermally aged asphalt in underwater tunnels Open
Asphalt could suffer hydrothermal ageing in underwater tunnels, which varies its combustion characteristics significantly. The hydrothermally aged asphalt (HA) was comparatively studied with base asphalt (BA) and thermal-oxidatively aged a…
View article: Research on a Multi-Objective Optimization Method for Transient Flow Oscillation in Multi-Stage Pressurized Pump Stations
Research on a Multi-Objective Optimization Method for Transient Flow Oscillation in Multi-Stage Pressurized Pump Stations Open
The long-distance multi-stage pressurized pump station water delivery system involves numerous valve closure parameters, complicating the rapid identification of an optimal valve closure scheme that satisfies multiple transient flow oscill…
View article: Dual-objective optimization strategy of self-adaptive transient pressure controller in water delivery engineering
Dual-objective optimization strategy of self-adaptive transient pressure controller in water delivery engineering Open
Controlling pressure impact of water hammer is an important guarantee for safe and stable running of pipeline systems. Previously, we proposed a spring self-adaptive auxiliary control (SAC) system to improve the pressure control ability of…
View article: Analysis of discharge characteristics of a symmetrical stepped labyrinth side weir based on global sensitivity
Analysis of discharge characteristics of a symmetrical stepped labyrinth side weir based on global sensitivity Open
In this paper, the discharge coefficient prediction model for this structure in a subcritical flow regime is first established by extreme learning machine (ELM) and Bayesian network, and the model's performance is analyzed and verified in …
View article: FDC prediction and inference: insights from the fusion of machine learning methods and basin characteristic factors
FDC prediction and inference: insights from the fusion of machine learning methods and basin characteristic factors Open
This paper aims to solve the problem of accurately estimating flow duration curves (FDC) in catchments lacking diachronic flow data. Based on 645 sets of observed data in the middle and lower reaches of the Yangtze River (YZR), which inclu…
View article: Numerical Study of Viscoelastic Microfluidic Particle Manipulation in a Microchannel with Asymmetrical Expansions
Numerical Study of Viscoelastic Microfluidic Particle Manipulation in a Microchannel with Asymmetrical Expansions Open
Microfluidic microparticle manipulation is currently widely used in environmental, bio-chemical, and medical applications. Previously we proposed a straight microchannel with additional triangular cavity arrays to manipulate microparticles…
View article: Investigation of partially expanded surge tank with self-adaptive auxiliary system controlling water hammer in pipelines
Investigation of partially expanded surge tank with self-adaptive auxiliary system controlling water hammer in pipelines Open
Intensive water hammer can cause pipe collapse in long-distance water transfer pipeline systems. Pressure control facilities like surge tank have been widely applied to help control the extensive pressure fluctuations. In our previous work…
View article: Investigation on Hydraulic Characteristics of Turbine-Type Manhole Cover
Investigation on Hydraulic Characteristics of Turbine-Type Manhole Cover Open
Manhole cover is an important device of urban drainage infrastructures. The hydraulic characteristics of turbine-type manhole covers were studied through numerical simulations and physical experiments. The flow field characteristics and wa…
View article: Stepped Spillway Slope Effect on Air Entrainment and Inception Point Location
Stepped Spillway Slope Effect on Air Entrainment and Inception Point Location Open
Spillway is a crucial hydraulic structure used to discharge excess water from the dam reservoir. Air entrainment is essential to prevent cavitation damage on the spillway, however, without air entrainment the risk of cavitation over the sp…
View article: Features and Control of Submerged Horizontal Vortex in Stepped Dissipation Wells
Features and Control of Submerged Horizontal Vortex in Stepped Dissipation Wells Open
Unlike a horizontal intake vortex, a submerged horizontal vortex is not bounded by a free surface. It has an axial air core submerged in a vessel such as a dissipation well. Due to the motion of its bound point (where the vortex ends), the…
View article: Water Hammer Control Analysis of an Intelligent Surge Tank with Spring Self-Adaptive Auxiliary Control System
Water Hammer Control Analysis of an Intelligent Surge Tank with Spring Self-Adaptive Auxiliary Control System Open
The water hammer can cause great risks in water supply pipe systems. A surge tank is a kind of general water hammer control device. In order to improve the behavior of the surge tank, a self-adaptive auxiliary control (SAC) system was prop…
View article: Effect of Height and Geometry of Stepped Spillway on Inception Point Location
Effect of Height and Geometry of Stepped Spillway on Inception Point Location Open
Air entrainment in a stepped spillway is very important to protect the spillway from cavitation damage. The inception point is the location where air starts entering the non-aerated flow zone. The inception point location depends on differ…
View article: Investigation into Complex Boundary Solutions of Water Filling Process in Pipeline Systems
Investigation into Complex Boundary Solutions of Water Filling Process in Pipeline Systems Open
Boundary conditions are usually the key problem in the establishment of a numerical model for simulation. An algorithmic method is needed to obtain a concrete numerical solution when the combined controlling equation sets are difficult to …
View article: Investigation on Water Hammer Control of Centrifugal Pumps in Water Supply Pipeline Systems
Investigation on Water Hammer Control of Centrifugal Pumps in Water Supply Pipeline Systems Open
Water hammer control in water supply pipeline systems is significant for protecting pipelines from damage. The goal of this research is to investigate the effects of pumps moment of inertia design on pipeline water hammer control. Based on…
View article: Experimental and Numerical Simulation of Water Hammer in Gravitational Pipe Flow with Continuous Air Entrainment
Experimental and Numerical Simulation of Water Hammer in Gravitational Pipe Flow with Continuous Air Entrainment Open
Water hammer is an undesired hydraulic shock phenomenon in water supply pipe systems. It is very important to simulate water hammer for preventing the hazard of over pressure. In order to predict the transient pressure caused by a valve cl…
View article: Investigation of Water Hammer Protection in Water Supply Pipeline Systems Using an Intelligent Self-Controlled Surge Tank
Investigation of Water Hammer Protection in Water Supply Pipeline Systems Using an Intelligent Self-Controlled Surge Tank Open
A surge tank is a common pressure control device in long pressurized pipelines. The performance is greatly influenced by the location, cross area, and the characteristics of the connector. In order to improve the property of the surge tank…
View article: Numerical Prediction and Risk Analysis of Hydraulic Cavitation Damage in a High‐Speed‐Flow Spillway
Numerical Prediction and Risk Analysis of Hydraulic Cavitation Damage in a High‐Speed‐Flow Spillway Open
Hydraulic cavitation is usually an undesirable phenomenon since it can damage the concrete surface of a chute spillway. In order to numerically predict the potential cavitation of a high‐speed flow in a chute spillway, a compound risk asse…
View article: Three-dimensional Numerical Simulation for a Spillway Tunnel with High Head and Large Discharge
Three-dimensional Numerical Simulation for a Spillway Tunnel with High Head and Large Discharge Open
At present, the domestic large-scale water conservancy projects increase in growing number augmenting the amount of the spillway tunnel with high head and big flow, and then the problem of the high speed air flow occur, which cause a serie…
View article: Shock Wave Speed and Transient Response of PE Pipe with Steel-Mesh Reinforcement
Shock Wave Speed and Transient Response of PE Pipe with Steel-Mesh Reinforcement Open
A steel mesh can improve the tensile strength and stability of a polyethylene (PE) pipe in a water supply pipeline system. However, it can also cause more severe water hammer hazard due to increasing wave speed. In order to analyze the inf…