... systematically. This approach delivers a consistent geometry around the tip even when the underlying conventional propeller geometry changes. Using this controlled geometry generation various tip rake designs are evaluated for its performance in open water, propulsion, cavitation and pressure pulse behaviour...

... ABSTRACT Super cavitating propellers design takes advantage of the formation of large cavities to increase flow velocity by reducing drag. Inter-blade flow of such a propeller is investigated experimentally via Laser Doppler Velocimetry and high-speed visualizations. Mean flow and fluctuations...

... ABSTRACT In this paper image-processing techniques for the study of cavitation types associated with erosion of marine propellers are presented. Blade root cavitation erosion was documented on three model-scale controllable pitch propellers using a combination of soft-paint techniques and high...

.... Analysis and practice show that in the outflow of the high-pressure area, a low-pressure area is created because of the inertial effect, which may cause cavitation bubbles in the fluid. This paper explains the mechanism of generating cavitation by an opened hole on ship bottom, and proposes methods...

... ABSTRACT The cavitating flow and cavitation-induced noise are evaluated for a seven-blade highly skewed propeller behind the SUBOFF boat under different cavitation numbers by numerical and experimental approaches. The hybrid method of Reynolds-Averaged Navier-Stokes (RANS) solver and Ffowls...

... ABSTRACT The fluid-structure interaction (FSI) effect of a two-dimensional rudder in the cavitating flow is numerically calculated by using a two-way FSI method, with Reynolds-Averaged Navier-Stokes (RANS) method for the solution of the fluid flow field and finite element method (FEM...

... ABSTRACT The main incentive to study cavitation inception has been the accompanying jump of noise. In this paper, the problem of tip leakage vortex cavitation inception is studied through experiments methods. The model tests of cavitation inception have been carried out at SSSRI K15 Cavitation...

... ABSTRACT Cavitation can be classified as gasification cavitation, vaporization cavitation and quasi cavitation. Cavitation produced by propeller can be further divided into vortex cavitation, vesicular cavitation, sheet cavitation and cloud cavitation. Vaporization cavitation phenomenon...

... ABSTRACT Aiming at the impeller of trailing suction dredger, on the premise of the same impeller dimensions, three kinds of twisted blades with inlet edge shape were designed. The model pump was made according to the proportion of 1:2. The external characteristics and cavitation performance...

... ABSTRACT This paper assesses cavitation inception on an 8.5 m tidal turbine blade by varying design parameters such as pitch angle, rotor speed, and tidal inflow speed. The research method uses JavaFoil to calculate hydrofoil data and AeroDyn to investigate cavitation and performance...

... ABSTRACT Underwater noise (URN) is the focus of academic research, and cavitation is an important source of underwater noise. This paper takes NACA66 (mod) two-dimensional hydrofoil as the research object, and uses the open source software OpenFOAM to simulate the sheet cavitation and sound...

... ABSTRACT The tip vortex induced cavitation affects the performance of the thrusters and causes noise radiation and vibration. Thus, it is desirable to know how to predict and control the tip vortex cavitation (TVC) and understand its mechanism, which a full understanding has not yet been...

... ABSTRACT Cavitation is a complex hydrodynamic phase transition phenomenon occurring in the low-pressure region of liquid, the interface between liquid and steam is fuzzy and requires high mesh resolution. Based on STAR-CCM+, this paper uses adaptive mesh refinement to simulate and analyze NACA...

... propeller hull noise cavitation channel sheet cavitation vortex cavitation synchronization test test section noise signal tip vortex cavitation cavitation pressure fluctuation propeller cavitation high-speed video hydrophone cavitation behavior ABSTRACT In order to obtain...

... Cavitation Flows in Non-Uniform Flow Fields Minsheng Zhao1, Decheng Wan1*, Changhong Hu2 1 Computational Marine Hydrodynamic Lab (CMHL), School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai, China 2 Research Institute for Applied Mechanics, Kyushu University...

... Abstract In this paper, to reveal the influence of different turbulence models on cavitation dynamics of a hydrofoil, we take NACA0015 geometry as an example, the Shear Stress Transport (SST) k-ω turbulence model and Large Eddy Simulation (LES) method are utilized to simulate the cavitation...

... Abstract The cavitation induced by tip vortices affects the hydrodynamic performance of a propeller and causes vibration and noise radiation. Thus, it is desirable to understand and predict its behavior. In this work, we present an adaptive mesh refinement (AMR) method to control the mesh size...

... via the volume of fluid (VOF) mode by CFD package. The cavitation effect which is frequently encountered in the case of high velocity flow condition was also included in this simulation. Two parameters that have a great influence on the hydrodynamics inside the nozzle are considered,including...

... CFD Study of Tip Vortex Cavitation around Hydrofoil Shang Liang1, Decheng Wan1*, Changhong Hu2 1 Computational Marine Hydrodynamics Lab (CMHL), State Key Laboratory of Ocean Engineering, School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai, China 2...

... Numerical Simulation of Cavitation Flows around NACA66 Hydrofoil by Adaptive Mesh Refinement Minsheng Zhao1, Decheng Wan1*, Zhonghua Li2 1 Computational Marine Hydrodynamics Lab (CMHL), State Key Laboratory of Ocean Engineering, School of Naval Architecture, Ocean and Civil Engineering, Shanghai...