... investigates the propulsion principle and hydrodynamic performance of an undulating fin under varying hydrodynamic conditions near the free surface. The fin was tethered in the flow field and actuated sinusoidally. A high-resolution numerical technique based on the dynamic mesh and volume of fluid method...

...Proceedings of the Thirty-third (2023) International Ocean and Polar Engineering Conference Ottawa, Canada, June 19-23, 2023 Copyright © 2023 by the International Society of Offshore and Polar Engineers (ISOPE) ISBN 978-1-880653-80-7; ISSN 1098-6189 www.isope.org Propulsion shafting vibration...

... ABSTRACT This study focuses on the hydrodynamic testing of a novel wave-propelled Autonomous and Surface Vehicle (ASV) called Demeter. The main objective of the study is to understand the vehicle performance in different wave conditions and its wave propulsion capability. Experiments were...

... conditions, and cavitation will reduce the propulsion efficiency of the propeller. INTRODUCTION The pod propulsion is an innovative propulsion system that combines propellers, pod, strut, and electric motor. Compared with the traditional propulsion system, the pod propulsion has higher transmission...

... ABSTRACT The steering and reversing gear is the main component of the water-jet propulsion which can embody the superiority of the manipulation of the water-jet propulsion ship. However, it is difficult to get an accurate input for mechanism structure optimization and hydraulic system design...

... ABSTRACT This paper presents a new method for transverse and longitudinal vibration monitoring of ship propulsion shafting based on three-axis acceleration sensor. The acceleration sensor is directly placed on the shaft, and the signal is transmitted wirelessly. In addition, to verify...

... oil film inclination angle bearing rotational speed calculation dynamic condition equivalent displacement alignment effective support position bearing load stiffness optimization deformation propulsion alignment calculation speed region load distribution engineering...

... ABSTRACT This paper reviews different hybrid-electric propulsion modes, i.e., series hybrid, parallel hybrid, and series-parallel hybrid. It then focuses on traditional propeller propulsion, shaftless rim propulsion, and pod propulsion. It mainly distinguishes and compares various propulsion...

... Abstract Flapping-foil thrusters arranged below the hull of the ship are examined for the exploitation of energy from wave induced motions by direct conversion to useful propulsive power. In the framework of Seatech H2020 project (https://seatech2020.eu/) flapping-foil thruster propulsion...

... velocity platform polygon calm water wind field host platform sensitivity trajectory experiment velocity vector skid coefficient entry angle propulsion Proceedings of the Thirty-first (2021) International Ocean and Polar Engineering Conference www.isope.org Rhodes, Greece, June 20 25...

... cross-section is better when Re is less than 250,000, and that with a drum-shaped cross-section is better when Re is more than 250,000. INTRODUCTION Marine MHD propulsion uses an electromagnetic force (Lorentz force) acting on seawater to generate a thrust. So few mechanical moving parts...

... CFD Investigations of Ship Propulsion Performance at Different Trim Angles Jianhua Wang1, Decheng Wan1*, Moustafa Abdel-Maksoud2 1 Computational Marine Hydrodynamics Lab (CMHL), State Key Laboratory of Ocean Engineering, School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong...

... ideas for vector control algorithm of waterjet propelled crafts. single waterjet allocation vector control algorithm longitudinal thrust thrust model nozzle angle control system thrust reverse duct angle waterjet propulsion optimization problem propulsion algorithm objective function...

... solution is selected by means of a dynamic programming optimization algorithm, in compliance with the existing geographical, propulsive and operability constraints. Ship seakeeping and propulsion system is modelled to realistically estimate the propulsion performances and fuel consumption, as well...

... speed. Wave glider is driven by the underwater propulsion device, on which the oscillation angle of fin is the key factor affecting wave energy utilization. In this paper, the optimal rotational angle of fin was analyzed by computer fluid dynamic method (CFD). The hydrodynamic model of underwater...

... Big Data Techniques for Ship Performance Study Alexios Anagnostopoulos Department of Mechanics and Maritime Sciences, Chalmers University of Technology. Gothenburg, Sweden ABSTRACT In this paper a new way to predict the propulsion power through the use of Big Data techniques is presented in order...

... ABSTRACT In recent years, with the increasing of the ship size, the ship propulsion should transfer more torque and thrust than before to guarantee the normal operation during the ship navigation which could cause severe vibration of the shaft. For the large vessels, the ship hull is always...

... ABSTRACT The topic of the paper is to answer the question whether wave energy can be utilized to propel a ship. In particular, whether a smart control of stabilizing fins may, in some conditions, produce a thrust easing the action of the propulsion system without losing its stabilizing...

... ABSTRACT Based on the ship model test and sea trial, the propulsion characteristics of a water-jet propelled planing monohull is studied. Carrying out towing test in high speed tank, the sailing characteristics of planing monohull is analyzed and the water-jet propulsion system of target ship...

... ABSTRACT Wave propulsion device (WPD) is a device that can directly absorb wave energy and convert it into forward thrust by using an oscillating hydrofoil. The concept of WPD has been proposed for many years and has been proved to be feasible as the dominating or assistant propulsion of ships...