Results 11 to 20 of about 174 (116)
Zhongguo Jianchuan Yanjiu, 2023 ObjectiveDue to the different arrangement and control mode of an underwater vehicle with an X-rudder configuration, the effectiveness of the after-control-surface is influenced by the angle of incidence of the underwater vehicle.MethodsNumerical ...
Jijun CHEN +5 more
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Comparisons between seabed and free surface effects on underwater vehicle hydrodynamics
International Journal of Naval Architecture and Ocean Engineering, 2022 This paper presents a numerical study on the hydrodynamic coefficients of the DARPA SUBOFF hull when deeply submerged and near the seabed. The CFD-based model was validated with experimental data, namely experiments involving the SUBOFF and BB2 ...
Xavier Ling +4 more
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Hydrodynamic Analysis of KVLCC2 Ship Sailing near Inclined Banks
Mathematical Problems in Engineering, Volume 2021, Issue 1, 2021., 2021 The hydrodynamic forces of KVLCC2 ship sailing near inclined banks are calculated by using CFD based on RANS equation. Corresponding CFD uncertainty analysis is conducted according to the procedure recommended by ITTC. An unstructured grid, tetrahedral grid, is employed for discretization.
Weilin Luo +3 more
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SCALE EFFECT ON THE LINEAR HYDRODYNAMIC COEFFICIENTS OF DARPA SUBOFF
Journal of Naval Sciences and Engineering, 2023 As well known, forces and moments acting on a ship are functions of Froude and Reynolds numbers. As a ship gets larger in size, these two numbers grow, which leads to different flow regimes around the hull. However, the state-of-the-art in maneuvering calculations is to consider the hydrodynamic coefficients as constants for model and full ship scales.
Furkan KIYÇAK, Ömer Kemal KINACI
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Theoretical and Applied Mechanics Letters, 2022 Flow around a real-life underwater vehicle often happens at a high Reynolds number with flow structures at different scales from the boundary layer around a blade to that around the hull.
Zhideng Zhou +3 more
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On the Influences of Air Bubbles on Water Flow in a Two‐Dimensional Channel
Mathematical Problems in Engineering, Volume 2021, Issue 1, 2021., 2021 As an inevitable trend for the sustainable development of the global economy, saving energy and reducing emissions are key goals for the entire world. The use of air bubbles to reduce viscous friction is one of the most effective approaches to achieve this goal, as it may significantly reduce the frictional drag of ships.
Wenyun Huang +5 more
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Influence of Full and Symmetrical Domains on the Numerical Flow around a SUBOFF Submarine Model using OpenFOAM [PDF]
Journal of Applied Fluid Mechanics, 2023 In this research, we consider the influence of two kinds of domain on the numerical flow around a submarine model. A fully appended SUBOFF submarine model was used, and the structure and characteristics of the flow were investigated under a full domain ...
N. V. A. Permadi +2 more
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Similarity analysis of the flow-induced noise of a benchmark submarine
Frontiers in Physics, 2023 As one of the three major noise sources of submarines, flow-induced noise plays a key role for the stealth capability of submarines. Several research studies based on experiment or simulation have evaluated the sound radiation from the scale model ...
Yao Qu +3 more
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Applied Sciences, 2023 Maneuverability is one of the submarine’s most important features, and is closely related to hydrodynamic coefficients. The submarine standard motion equation is the most commonly used hydrodynamic mathematical model, estimating more than 100 ...
Guo Xiang +4 more
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Experimental Results of an Underwater Glider Hydraulic Model Test in Towing Tank of NIMALA [PDF]
Journal of Hydraulic and Water Engineering, 2023 In this article, the hydraulic experimental results of a model of an underwater glider in the marine laboratory (towing tank) of NIMALA are presented. In these hydraulic tests, the resistance force has been extracted at 7 speeds and in three different ...
E. Asadi Asrami +3 more
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