... is assembled by large amounts of floaters with propeller and the sea crossing structure is combined with the driving structure by columns. diagram hydraulic character vibration subsea system transportation platform vortex tab hydraulic diagram floater norske veritas engineering south china...

... ABSTRACT A toroidal propeller is an advanced propulsive system, which is composed of toroidal closed blades and a hub. The open-water performance of the toroidal propeller is numerically simulated in order to examine the influence of the front and aft blades on the tip vortex and wake field...

... ocean engineering boundary optimization journal thickness vortex Proceedings of the Thirty-fourth (2024) International Ocean and Polar Engineering Conference Rhodes, Greece, June 16 21, 2024 Copyright © 2024 by the International Society of Offshore and Polar Engineers (ISOPE) ISBN 978-1-880653...

... numerical calculations, two-dimensional cylinders are often used to save calculation resources. However, the study (Chen et al., 2023) has shown that although the fluid field is two-dimensional in the near wake, with the development of the wake, the wake vortex becomes smaller and more chaotic...

... are obtained; Secondly, the velocity cloud map of the process of generating wake vortices on the oscillating plate was analyzed. Based on the above research, it is shown that as the sharpness of the wing edge of the heave plate increases, the rate of vortex shedding at the wake of the heave plate increases...

... ABSTRACT Vortex shedding of the NACA0009 hydrofoil with oblique truncation trailing edge was studied by three-dimensional (3D) and two-dimensional (2D) numerical simulation using the shear stress transport (SST) k-ω turbulence model. The vortex shedding formation process, the boundary layer...

... on Vortex-Induced Motion of a Platform with Motion Suppression Structure Yanqi Zhu1, Xiaofeng Kuang1, Zhanhua Zhao1, Hongtao Yuan2 1 China Ship Scientific Research Center, Wuxi, Jiangsu, China 2 Shanghai Waigaoqiao Shipbuilding Co., LTD, Shanghai, China ABSTRACT In this paper, vortex induced motion...

... are linked to the hydrodynamic interaction with the propeller wake, whereas the higher values are ascribed to the rudder natural mode of vibrations. Moreover, the identification of the specific contribution of the tip and hub vortex to the rudder deformation is presented. INTRODUCTION Marine rudder...

... operating in open water. We show that the wake topology is similar to that observed in open water only for low-loading conditions. For mild blade loading, the free surface's presence seems to stabilize the flow. On the contrary, for high blade loading, the mutual interaction between the vortex system...

... ABSTRACT In this paper, the dynamic response of a self-induced elastic deformation of a beam attached to a cylinder in channel flow were studied in the two-dimensional flow regime. We explored the response of the elastic deformation of a beam for a wide range of geometric features. The vortex...

... ABSTRACT Floating offshore platforms mostly consist of a single cylinder or multi-cylinder, which is susceptible to vortex-induced motions (VIM) in the ocean current. In this paper, numerical simulations are performed to study the VIM of four rigidly connected cylinder at a large reduced...

... simulation vortex riser tlp platform uniform flow vim standard deviation vim response Proceedings of the Thirty-second (2022) International Ocean and Polar Engineering Conference Shanghai, China, June 5 10, 2022 Copyright © 2022 by the International Society of Offshore and Polar Engineers (ISOPE...

...-rope-drum wave power generation device was calculated by using computational fluid dynamics method and fluent combined with C++ programming. The motion of the floating body was realized by using dynamic grid, and the structural heave and sway curves were obtained. In addition, the vortex induced motion...

... a significant impact on the open water performance, vortex structures, as well as the instability of the wake evolution. In this paper, based on the Ka4-70 propeller and 19A duct model, simulations of open water propeller and a ducted propeller with tip clearance d = 1.01mm are carried out. Firstly, open...

.... The paper compares the simulation results of cylinder and rod-NACA0012, analyzes the difference of vortex distribution using Liutex and turbulent energy distribution in the flow field. Besides, this paper analyzes the linear and nonlinear terms of SPL. Several sound pressure probes are arranged around...

... Abstract Prediction of hydrodynamic forces acting on a ship hull is important to predict ship manoeuvrability precisely. In this paper, SQCM (Source and Quasi Continuous vortex lattice Method) is introduced to predict lateral force and yawing moment acting on a ship hull representing the shape...

... Abstract Theoretically, the vortex–induced vibration, caused by the trailing vortex shedding in flows around the blunt body, is probably major reason for structural fatigue damage. An effective way in engineering is to attach a thin plate in the wake of the blunt rigid body, that can reduce...

... with a certain the vortex shedding frequency of the flow around a bluff body. In this frequency obeying the Strouhal law, i.e., the Strouhal number study, the Strouhal number for a near-wall circular cylinder fully immerged in a shear flow was experimentally investigated within the St = fsD /U , in which fs...

... Abstract In this paper, the forced vibration and vortex induced vibration of a cylinder under the combined action of uniform flow and oscillatory flow were numerically simulated by using dynamic grid technology. The effects of the distance between the cylinder and the wall and the number...

... Abstract Vortex–Induced Vibration (VIV) is an important problem that can be seen in offshore structures such as drilling riser. VIV occurred due to synchronization (lock–in) of the vortex shedding and natural frequency of the structure. The lock–in phenomenon is normally observed...