... the control equipment and the shape of the tethered underwater vehicle carried out. In investigating the influence of the ducted propeller on the underwater vehicle, Wu et al. (2015) investigated the thrust characteristics of the ducted propeller in the flow field of an underwater vehicle in turning motion...

... ABSTRACT Due to its special geometric shape and appropriate propeller and duct design, ducted propeller has the characteristics of low noise, high efficiency, and ability to work normally under heavy load conditions, which are superior to ordinary propellers. The existence of the duct has...

... Abstract The study investigates the maneuverability, and hydrodynamic performance of the underwater robot installs hydrofoils and ducted Propellers symmetrically in a uniform flow field. Numerical simulation is based on the multiple computational fluid dynamics (CFD) technique...

... Abstract This paper carries out investigation on aerodynamic characteristics of an icebreaking hovercraft based on the numerical simulation method. The whole research model is divided into six configurations as follows: ducted propeller only; hull only; lift fan with bow thruster; hull...

... ABSTRACT An underwater robot usually consists of a main body and several control ducted propellers. In numerical simulation on the hydrodynamic behavior of underwater robot at a high speed motion in large computational domain with CFD approaches, some computational failures may occur due...

... ABSTRACT In this paper, a systematic method to design marine ducted propellers is presented for a given duct shape and design conditions to achieve the highest efficiency while avoiding cavitation. The duct is solved by the 2D-axisymmetric Reynolds-Averaged Navier-Stokes (RANS) method...

... Abstract A numerical method to observe thrust behavior of a ducted propeller attached in an underwater vehicle under the influence of flow field of the vehicle's main body is proposed, the thrust characteristics of ducted propeller and the velocity distribution around the propeller when...

... Abstract QCM has been applied to open-water thrust and torque predictions of the ducted propellers with different positions of the propeller and duct. The QCM results are in good agreement with the experimental data of the propellers positioned inside a duct. The results of propellers...

... developed vortex lattice method (VLM) is coupled with Renolds Averaged Navier Stokes (RANS) based Computational Fluid Dynamics (CFD) tools, in order to predict the hydro-dynamic performance of ducted propulsion systems. The analysis of the performance for ducted propellers subject to steady and unsteady...

... ABSTRACT The ducted propeller is widely used as a propulsor in submarines, torpedos, UUVs (unmanned underwater vehicles), underwater robots, and DPDs (diver propulsion devices) because of its high propulsive efficiency. Its merits also include collision protection, efficiency enhancement...

... A CFD (Computer Fluid Dynamics) Analysis Based Design Method For An Autonomous Underwater Vehicle Ducted Propeller Tae-hwan Joung, Karl Sammut, and Fangpo He School of Computer Science, Engineering and Mathematics, Faculty of Science & Engineering, Flinders University, Adelaide, South Australia...

.... INTRODUCTION Ducted propellers have been used for many years in the marine industry to both protect the propeller from damage, and to improve upon the propeller efficiency under certain load conditions, Consequently a wide range of tests have been carried out on the units and much performancee data has been...

... ABSTRACT: This paper presents the key results of a comprehensive study into the nature and magnitude of the mechanisms which contribute to the loads on both open and ducted propellers in the presence of ice. Both model test and full scale trials measurements and visual observations were...