... ABSTRACT For the tunnel thruster, the strut of the gearbox may impose excessive vibration and noise. The current study separately adopts RANS and DES method to study the influence of the cross-section shape of the gearbox strut on the unsteady hydrodynamics of the tunnel thruster. It mainly...

... ABSTRACT Azimuth propulsors are widely used as main propulsion unit on icebreakers and ice-going ships due to high maneuverability and good performance on ice management. Strength of pod, including strut, of ice-classed azimuth propulsors shall be specially considered since they are exposed...

... of longitudinal and according to available full-scale and model data: transverse ice forces on azimuth thruster = 05 (1) Design scenario Scenario 1. Longitudinal impact of an ice block on a leading edge of the 15 strut of pushing-pulling azimuth thruster where thrust of propulsion complex at bollard, kN; = 5...

.... INTRODUCTION The basic structure of the small water area twin hull ship (SWATH) is two slender underwater bodies and struts, which has a large wetted surface area, and its development trend is high-speed and large-scale. Therefore, Reducing resistance especially friction resistance during high-speed...

... ABSTRACT The free surface turbulent flow around a vertical surface-piercing strut advancing in calm water has been studied by using an open-source Smoothed Particle Hydrodynamics (SPH) solver DualSPHysics. The strut has a symmetric NACA 0024 foil section and it advances with uniform...

... the scale effect of each component of the podded propulsor. It focuses on the scale effect associated with the pod body and the strut. Based on the analysis of the pod body drag and the strut drag at different scales, a correction method is proposed for the frictional drag coefficients of the pod body...

... ABSTRACT An unconventional SWATH vehicle with inclined struts is proposed and the influence of submergence depth on its resistance in calm water is investigated by numerical and experimental method. At different submergence depth, resistance performance of a torpedo hull, which is based...

... at the north. The site contact with the building of 5 stores basement at the east. The earth retaining walls is planned by diaphragm walls of 1,000mm thick. The walls are supported by the slab and strut, which are again resisted by the Barrette piles at each column location. Fig. 8 Plane figure of excavation...

... Abstract Two-dimension numerical simulations are carried out to study the hydrodynamic performance of the SWATH hull sections with inclined struts and vertical ones damping in restricted water based on viscous flow theory, solving the Reynolds-averaged Navier-Stokes equations (or RANS...

... was given. Similarly, Howell et al. (2010) performed with unsteady RANS equations, and showed that the numerical result could differed greatly from experimental one especially with high tip-speed ratio (TSR). The secondary effects by a center shaft and the supporting struts of turbine rotor were found...

... vectors are contained in a perpendicular plane to the rotation axis, which translates into increased hydrodynamic efficiency. On the other hand, this design usually includes a number of struts to support the blades and connect them to the central shaft. The struts disturb the flow through the rotor...

... agreement is obtained. The interaction between the strut and the propeller and the effect of the strut on the hydrodynamic performance are analyzed by comparing the flows around the podded propeller and the single propeller. INTRODUCTION Podded propellers have recently been widely used in modern...

... itself and that of suitable experimental procedures with which to evaluate its hydrodynamic performance. computation boundary condition torpedo-like body artificial reef block test body numerical result submerged body drag force upstream oil & gas strut experiment experimental...

... et al. 2002, Takagi et al. 2003). The structure is composed of slender beams, demi-hulls and struts. Shape of struts is wing so that the wing induces a lateral force to counter the wind drag force. The structure is planned to work in the exclusive economic zone. beam wave displacement head...

... will be discussed. According to the comparison between classic analytic model and continua mechanics model; (1) on the design of the retaining wall and related strut system at un-symmetrical position, the active lateral earth pressure was found much larger than Rankine s predication. (2) The analytic displacements...

..., is a quite difficult task. Different phenomena have to be taken into account: fixed and vortex cavitation, relevant free-surface effect, flow interaction with the strut bearing the hydrofoil. This is the case of the Surface Piercing, Hydrofoil Controlled Wing-In-Ground Effect (SP-HC-WIG) vehicle...

...-speed ships. In this paper we deal with the mea- surements of forces acting on the submerged control surfaces of the scaled model of the SPW-02. In particular, we obtained the force co- efficients of both the after strut and the control foil at different angles of attack and Reynolds numbers. Movies...

... be optimized, by a Total Resistance Linear Theory, maintaining restricted the main design parameters: volume, centre of buoyancy, hull-strut beam and centre of gravity. The implemented tool revealed fast enough to satisfy early design purposes. KEYWORDS SWATH vessels, Ship Design, Wave Making Resistance...

...) the "strut and tie" method. The zooming technique consists of refinement which is obtained by continuously decreasing the size of the meshes : the transition zone where the decrease of size mesh occurs needs to be included into the global model. In this transition zone, triangular or quadrangular elements...

..., the dominant factor affecting wave amplitude and period will be the ratio of the maximum disturbance width (i.e., beam of a vertical strut) over the channel width, while L has little effect. This confirms Ertekin's (1984) and Mei's (1986) earlier results on the "blockage coefficient". When L is of the same...