Chen-Jun Yang
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View article: Research on the Gradient of Aquatic Ecological Integrity of Phytoplankton in Regional River Segments of Jiangsu Province and Its Driving Mechanism
Research on the Gradient of Aquatic Ecological Integrity of Phytoplankton in Regional River Segments of Jiangsu Province and Its Driving Mechanism Open
To study the structure and distribution characteristics of the phytoplankton community in the Huaihe River Basin, Yangtze River Basin, and Taihu Lake Basin in Jiangsu Province, 126 sampling sites were set up in 35 rivers in the region, and…
View article: Experimental and Numerical Investigation of the Impacts of Rotor Tip-Rake on Excitation Forces of Pump-Jet Propulsors
Experimental and Numerical Investigation of the Impacts of Rotor Tip-Rake on Excitation Forces of Pump-Jet Propulsors Open
The tip-clearance flow in a pump-jet propulsor exerts great impacts on the fluctuating pressures and resultant unsteady forces, which are important sources of structural vibrations and radiated noise underwater. The blade geometry close to…
View article: Evaluation of Differential Settlement of Subgrade for Highway-Widening Projects
Evaluation of Differential Settlement of Subgrade for Highway-Widening Projects Open
Highway widening is an important way to improve the existing expressway capacity and promote the development of transportation systems. The differential settlement between the old and new subgrade is the key factor to evaluate whether it i…
View article: Numerical study on a coupled viscous and potential flow design method of axial-flow pump impeller
Numerical study on a coupled viscous and potential flow design method of axial-flow pump impeller Open
Axial-flow pump is widely used in water-jet propulsion, and its hydrodynamic and cavitation performance have an important effect on the performance of the vessel. Therefore, the study of pump design is very important. In this work, a coupl…
View article: Dynamic Mechanical and Chemorheology Analysis for the Blended Epoxy System with Polyurethane Modified Resin
Dynamic Mechanical and Chemorheology Analysis for the Blended Epoxy System with Polyurethane Modified Resin Open
As the important matrix material, epoxy resin has been widely used in the composites for various fields. On account of the poor toughness of epoxy resin limiting their suitability for advanced applications, considerable interests have been…
View article: Design of open-water and wake-adapted optimum propellers based on a vortex lattice lifting-surface model
Design of open-water and wake-adapted optimum propellers based on a vortex lattice lifting-surface model Open
A new design procedure has been proposed for optimum marine propellers operating in uniform and radially non-uniform inflows based on a vortex lattice lifting-surface model (VLM). The procedure consists of two stages. In the first stage, t…
View article: Effects of Section Geometry on the Energy-saving Rate of PBCF and Model/full-scale Correlation - A CFD Study
Effects of Section Geometry on the Energy-saving Rate of PBCF and Model/full-scale Correlation - A CFD Study Open
The steady flows and hydrodynamic performances of a propeller without and with the Propeller Boss Cap Fins (PBCFs) are simulated by solving the Reynolds-averaged Navier-Stokes (RANS) equations using the software package STAR-CCM+. To deter…
View article: Numerical investigation of tip geometry on the tip-clearance flow features of a pump-jet propulsor
Numerical investigation of tip geometry on the tip-clearance flow features of a pump-jet propulsor Open
The numerical simulation for pump-jet propulsors is based on the solution of the Reynolds-Averaged Navier-Stokes (RANS) equations using a two-layer realizable k- model for turbulence closure. The computational domain is discretized into b…
View article: Experimental and numerical investigation of blade geometry effect on propeller cavitation and noise
Experimental and numerical investigation of blade geometry effect on propeller cavitation and noise Open
In this paper, the effects of propeller blade geometry on cavitation and noise
\nwere studied by model tests and numerical simulations. Section thickness distribution, skew and tip
\nrake are considered. Propeller model tests were carried…
View article: Full-scale simulation and analysis of self-propulsion performance of CRP-propelled high speed underwater vehicles
Full-scale simulation and analysis of self-propulsion performance of CRP-propelled high speed underwater vehicles Open
[Objectives] In order to numerically predict the self-propulsion factors of high speed underwater vehicles equipped with Contra-Rotating Propellers (CRP),[Methods] RANS modeling approaches are developed for vehicle resistance,self-propulsi…
View article: Numerical Simulation and Uncertainty Analysis of an Axial-Flow Waterjet Pump
Numerical Simulation and Uncertainty Analysis of an Axial-Flow Waterjet Pump Open
Unsteady Reynolds-averaged Navier–Stokes simulations of an axial-flow pump for waterjet propulsion are carried out at model scale, and the numerical uncertainties are analyzed mainly according to the procedure recommended by the twenty-eig…
View article: Effects of blade geometry on cavitation and pressure fluctuations of tunnel thrusters
Effects of blade geometry on cavitation and pressure fluctuations of tunnel thrusters Open
Compared with open propellers, tunnel thruster blades are more vulnerable to cavitation and local structure vibration problems because they are typically heavily loaded and subject to severe non-uniformity of inflow produced by the blunt g…
View article: Observations and computations of narrow Kelvin ship wakes
Observations and computations of narrow Kelvin ship wakes Open
Computations of far-field ship waves, based on linear potential flow theory and the Hogner approximation, are reported for monohull ships and catamarans. Specifically, far-field ship waves are computed for six monohull ships at four Froude…
View article: Detached eddy simulation of blade-pod interactions
Detached eddy simulation of blade-pod interactions Open
For the tractor type podded propulsor there is a strong interaction between
\n
\npropeller wake and pod housing, which would cause fluctuation of pod housing forces, even lead to
\ncavitation on pod housing. In this paper, the DES model i…
View article: Investigation of tunnel thruster performance and flow by quasi-steady and unsteady RANS simulations
Investigation of tunnel thruster performance and flow by quasi-steady and unsteady RANS simulations Open
Two numerical models based on the solution of the RANS equations using the SST
\n
\nk-ω turbulence model have been employed to investigate the hydrodynamic performance and flow of
\ntunnel thrusters. The flow passages between adjacent bla…