... ABSTRACT Numerical analysis based on stress-breeding eddy simulation (SBES) is carried out for the submarine at different speeds. The strengths of the two typical vortex structures were firstly compared, and the strength of the horseshoe vortex was larger than that of the top tip vortex...

... ABSTRACT In the development of modern marine technology, the hydrodynamic performance of submarine is very important to its maneuverability. However, under extreme maneuvering conditions, the complex dynamic behavior of submarines is difficult to accurately simulate by traditional experimental...

... ABSTRACT The self-propelled Joubert BB2 submarine near the free surface is studied in homogeneous, strongly stratified, and linearly stratified fluids respectively. The differential effects of the flow field are analyzed under varying submergence conditions across these three kinds of fluids...

... ABSTRACT The present study predicts the underwater resistance of a SUBOFF submarine model based on the Reynolds-averaged Navier-Stokes (RANS) method. The impacts by forward speed, pitch angle, diving depth and appendages are investigated. With the increase of pitch angle, the resistance...

... ABSTRACT As a heavy weapon of great powers, submarines play an important role in the strategic competition in the polar region. The existence of ice sheet in the polar region has an impact on the navigation of submarines, especially hindering their surfacing movement. The bond-based...

... ABSTRACT For submarines, at the model scale, it is rare to simultaneously consider the effects of high Reynolds numbers and stratified flow on the wake. In this study, numerical simulations of the wake of the SUBOFF bare hull are conducted under Reynolds number ( Re = 1.2×10 7 ) and Froude...

... ABSTRACT This study uses STAR-CCM+ 2302 to numerically investigate the flow field and hydrodynamic performance of Joubert BB2 and SUBOFF submarine models under straight and oblique navigation. Key analyses include the comparative analysis of free surface waveform, longitudinal force, velocity...

...Proceedings of the Thirty-fourth (2024) International Ocean and Polar Engineering Conference Rhodes, Greece, June 16 21, 2024 Copyright © 2024 by the International Society of Offshore and Polar Engineers (ISOPE) ISBN 978-1-880653-78-4; ISSN 1098-6189 www.isope.org Simulation analysis of submarine...

... and the semi-submersible or full-submersible low-speed navigation state by changing the parameters such as displacement and speed. It takes into account the high speed of the surface ship and the concealment of the submarine. And it can quickly enter the target area to perform tasks and retreat. It also has...

... ABSTRACT The density is not constant in the real environment of submarine navigation. So it's necessary to study the hydrodynamic characteristics and wake of full-scale submarine in weakly stratified fluid. For the purpose of simulating the submarine sailing in the real sea condition...

... submarine numerical simulation investigation operation modeling & simulation navigation variation mesh coefficient engineering journal generator reservoir simulation shanghai jiao tong university characteristic tank hydrodynamic characteristic Proceedings of the Thirty...

... Induced by a Moving Submarine Model in Two-Layer Fluids Linjie Li1, Qingjie Meng2, Liushuai Cao1, Decheng Wan1* 1 Computational Marine Hydrodynamics Lab (CMHL), School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai, China 2 Wuhan Second Ship Design and Research...

... submarine and stroke speeds of a system of hydraulic actuators. In the next sections, the implementation of dimensional analysis is demonstrated using a case study containing only four input variables and two responses, followed by a description of the procedure extending the model applicability for single...

... upstream oil & gas frequency efficiency coefficient equation submarine thrust generation strouhal number open water condition asia government simulation total resistance efficiency value thrust coefficient foil propulsive performance amplitude pivot axis simulation...

... ABSTRACT This study conducted a comparative analysis between the captive model test results of BB2 submarine model with a scale ratio of 1/15 and the relevant computational fluid dynamics (CFD) results based on an Unsteady Reynolds-averaged Navier-Stokes (URANS) and large eddy simulation (LES...

... experience is designed and the depth control effect diagram is given. Compared with the traditional double closed-loop PD controller, the adaptive fuzzy controller has better control effect. The residual buoyancy observer is added to eliminate the trim angle caused by the imbalance of the submarine's direct...

... artificial intelligence flow field high frequency data prediction method prediction low frequency data submarine time step deep learning machine learning prediction result neural network cylinder network model original data characteristic frequency data grid point fore region...

... are hard to control, so an integrated and easily controlled SUV is needed. upstream oil & gas simulation hydrodynamic coefficient motion stability artificial intelligence stability motion test submarine suv coefficient underwater vehicle coordinate system rotation plane tank curve...

... dawson wave resistance theoretical result model iii coefficient slender body geometry submarine free surface spheroid trim angle kozin formula ice cover submergence depth lift force magnitude length-to-diameter ratio ABSTRACT The article touches upon an unsteady...

...Proceedings of the Thirty-first (2021) International Ocean and Polar Engineering Conference www.isope.org Rhodes, Greece, June 20 25, 2021 Copyright © 2021 by the International Society of Offshore and Polar Engineers (ISOPE) ISBN 978-1-880653-82-1; ISSN 1098-6189 Numerical simulation of submarine...