Results 11 to 20 of about 101 (80)

Large Flow Separations around a Generic Submarine in Static Drift Motion Resolved by Various Turbulence Closure Models

open access: yesJournal of Marine Science and Engineering, 2022
A thorough numerical introspection for assessing the particular issues of large flow separations around a submersible hull by using various turbulence models is described.
Adrian Lungu
doaj   +1 more source

Numerical Investigation of Tip Vortex Cavitation Inception and Noise of Underwater Propellers of Submarine Using Sequential Eulerian–Lagrangian Approaches

open access: yesApplied Sciences, 2020
In this study, the high-fidelity numerical methods are developed to investigate the tip vortex cavitation (TVC) inception and noise of underwater propellers, namely, Model-A and Model-B, which are designed to investigate the effects of sweep angle on ...
Garam Ku   +3 more
doaj   +1 more source

Stability and Manoeuvrability Simulation of a Semi-Autonomous Submarine Free-Running Model SUBOFF with an Autopilot System

open access: yesApplied Sciences, 2021
On the basis of a full-appendage DARPA SUBOFF model (DTRC model 5470), a scale (λ = 0.535) semi-autonomous submarine free-running model (SFRM) was designed for testing its manoeuvrability and stability in the constrained water.
Yu-Hsien Lin, Yu-Ting Lin, Yen-Jun Chiu
doaj   +1 more source

Tripping effects on model-scale studies of flow over the DARPA SUBOFF

open access: yesJournal of Fluid Mechanics, 2023
Trip-resolved large-eddy simulations of the DARPA SUBOFF are performed to investigate the development of turbulent boundary layers (TBLs) in model-scale studies. The primary consideration of the study is the extent to which the details of tripping affect statistics in large-eddy simulations of complex geometries, which are presently limited to moderate
Nicholas Morse, Krishnan Mahesh
openaire   +1 more source

Numerical Flow Characterization around a Type 209 Submarine Using OpenFOAM

open access: yesFluids, 2021
The safety of underwater operation depends on the accuracy of its speed logs which depends on the location of its probe and the calibration thoroughness.
Ruben J. Paredes   +3 more
doaj   +1 more source

Hydrodynamic Investigation of a Submarine Moving Under Free Surface [PDF]

open access: yesJournal of Eta Maritime Science, 2019
Submerged bodies are commonly used in many fields such as scientific researches, military and commercial applications. Especially in military applications, submarines have a significant role as a silent and deterrent vehicle. Contrary to popular belief,
Ali DOĞRUL
doaj   +1 more source

The Investigation of a Sliding Mesh Model for Hydrodynamic Analysis of a SUBOFF Model in Turbulent Flow Fields

open access: yesJournal of Marine Science and Engineering, 2020
A computational fluid dynamics (CFD)-based simulation using a finite volume code for a full-appendage DARPA (Defense Advanced Research Projects Agency) SUBOFF model was investigated with a sliding mesh model in a multi-zone fluid domain.
Yu-Hsien Lin, Xian-Chen Li
doaj   +1 more source

Numerical Simulation of Hydrodynamic Forces on an Underwater Vehicle Near the Free Surface [PDF]

open access: yesJournal of Applied Fluid Mechanics
Underwater Vehicles (UVs), including Autonomous and Remotely Operated Vehicles, are increasingly utilized in marine applications such as exploration, surveying, and defense.
M. S. Ahmad   +5 more
doaj   +1 more source

ON SELF-PROPULSION ASSESSMENT OF MARINE VEHICLES

open access: yesBrodogradnja, 2018
Estimation of ship self-propulsion is important for the selection of the propulsion system and the main engine so that the ship can move forward with the required speed.
Omer Kemal Kinaci   +3 more
doaj   +1 more source

DES-based computation of the flow around the DARPA suboff

open access: yesIOP Conference Series: Materials Science and Engineering, 2019
Abstract Flow modelling is a key issue not only for the correct prediction of hull-propeller interactions, manoeuvring characteristics and the flow field in the stern region of any marine vehicle, but also for the correct estimation of the fuel consumption.
openaire   +1 more source

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