... compared. The results demonstrate that the phenomenon of resistance increase also exists in weakly stratified environment. Moreover, the scale effect on pressure distribution and free surface can be observed at the positions where the submarine surface curvature changes drastically. INTRODUCTION When...

... of the nominal wake field on the propeller disk between the real scale and the model scale (scale effect problem of the wake field) leads to the change of the propeller propulsion efficiency along with a series of problems such as cavitation, noise, and excitation [4-5] (Chu Shaowei, 2012; Han K, 2006...

... with scale ratio λ=1:1 are compared, and the scale effect of the added resistance of moonpool is analyzed. INTRODUCTION In order to meet the needs of underwater drilling operations and ensure the safety of operating equipment and operators, the moonpool structure is often arranged in the middle...

... ABSTRACT The open-water performance of podded propulsors of different sizes are numerically simulated by using the RANS method with a realizable k - ε turbulence model to study the scale effect of each component of the podded propulsor. It focuses on the scale effect associated...

... in order to study the scale effect of appendage resistance. The results demonstrate that the total resistance coefficient of the ship appendage can be obtained by adding the residual resistance coefficient of the experimental results in the tank and the friction resistance coefficient of the ship appendage...

... considerable influence: rough seas impose a fluctuating load on the propeller, possibly increasing the diesel engine's fuel consumption and wear. Moreover, so-called hydrodynamic scale effects occur: incorrectly scaled flow of water around hull and propeller result in incorrect scaling of forces. Despite...

... ABSTRACT In this paper, scale effect of PBCF at different advance coefficients is investigated using IDDES turbulence model and sliding mesh technique. Predicted results of thrust and torque coefficients at different advance coefficients agree well with their experimental counterparts...

... pressure level undersea noise counter-rotating propeller renewable energy predominant frequency tidal turbine tidal stream power unit blade element ocean energy numerical simulation frequency reynolds number total pressure loss scale effect kanemoto Undersea Noise and Scale Effect...

... Investigation on the Scale Effect of Maneuverability Based on Model Tests and Sea Trials of a Ship Xiaojian Liu1,2, Jun Nie1, Zhaodan Xia1,and Sheming Fan1,2 1 Shanghai Key Laboratory of Ship Engineering, Marine Design and Research Institute of China (MARIC 2 Laboratory of Science and Technology...

... out for static drift, pure sway and pure yaw tests to study the scale effects on the forces and moments obtained from the captive manoeuvres. From the obtained results, scale effects are found to influence the predictions of surge force and sway force but are not significant in the yaw moment...

.... resistance numerical result boundary condition experiment marine transportation vlcc channel flow simulation coefficient yang equation ship hull resistance scale effect ballast characteristic value ship model experiment numerical simulation freight & logistics services formula...

... tests and the numerical results by two different simulation models. Discussions were made on the scale effect on towing characteristics of a barge and wave effect. drag coefficient yasukawa resistance hydrodynamic force derivative barge mmg model cross-flow model scale effect upstream oil...

... as the deck and the light source of the BIV system. A high speed camera was used to record images for BIV velocity determination. Measurements taken in the large model basin were used to compare with measurements taken in a small wave tank in a laboratory for examining the scale effect. INTRODUCTION...

..., a probabilistic framework is believed to be most appropriate for modeling spalling fracture. In the present analysis a probabilistic fracture mechanics model has been used to illustrate the link between probabilistic aspects of fracture and the observed scale effect for compressive ice failure, whereby pressure...

... corresponding to the equilibrium stage S is called the equilibrium scour depth. In live-bed scour experiment, scale effects must be considered when the results of small-scale laboratory experiments are extrapolated to real- life situations. There are several scale effects, such as the effect of the Reynolds...

... on the far wake of horizontal axis tidal turbines in an effort to reduce complexity and avoid potentially excessive scale effects within laboratory tests. tip speed ratio production monitoring velocity profile scale effect bahaj experiment marine current turbine reservoir surveillance myer...

...- effective approach compared to the other two approaches. For model test, although it is considered as the most reliable approach in the past, the scale effect problem is still a major uncertainty in load prediction for prototype jack-ups. Engineering calculation approaches in the SNAME guidelines...

... to 7%, that is to say the incremental quantity of form factor due to scale effect of Reynolds number is approximately 7% of experimental value of form factor. And the incremental quantity should be increased when full- scale form factor prediction is done. The value of CR is approximately equal...

... in survival conditions, due to the breakwater type behavior of such platforms. smaller model steepness nonlinear effect scale effect cylinder runup wave steepness subsea system wave runup experiment fiona paterson ka 0 experiment wave runup prediction thiagarajan circular cylinder...

... order of vibration mode in X direction natural frequency analysis unit area exp vibration mode aspect ratio 1 natural frequency aspect ratio scale effect subsea system experimental result response function matrix testing model frequency mass matrix elastic plate pre...