Results 41 to 50 of about 174 (116)
A numerical investigation on interaction effects between two underwater vehicles in close proximity
Journal of Ocean Engineering and ScienceUnderwater vehicles operating in close proximity suffer from significant hydrodynamic interactions, especially when there is a prominent vehicle size disparity.
Zi-Qiang Zheng +3 more
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Computational investigation of the self propulsıon performance of Darpa Suboff vehicle [PDF]
, 2017 In this paper, the resistance and power values which are very important for the hydrodynamic performance of an underwater vehicle have been calculated using both an empirical method and Computational Fluid Dynamics (CFD) analysis. The self-propulsion of the vehicle has been investigated using Actuator Disk Theory.
Delen, Cihad, Sezen, Savas, Bal, Sakir
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DES-based computation of the flow around the DARPA suboff
IOP 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.
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Journal of Marine Science and EngineeringIn this paper, the hydrodynamic characteristics of a rim-driven thruster (RDT) behind the hull of an underwater vehicle are investigated. The studied underwater vehicle is the benchmark DARPA (Defense Advanced Research Projects Agency) suboff model, with
Bao Liu +3 more
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A Study on Flow-Induced Noise Simulation Using SUBOFF ModelBased on Bayesian Sparse Grids
水下无人系统学报This paper proposed a Bayesian-based sparse grid correction method to address the degradation in flow-induced noise prediction accuracy arising from mismatched spatial scales between finite element model grid dimensions and turbulent boundary layer ...
Jiayu LIU +6 more
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Evaluating Ice Load during Submarine Surfacing and Ice Breaking
Journal of Marine Science and Engineering, 2023 At present, the calculation method of ice load on surface navigation ships has been very mature, but the calculation method of submarine ice load is very few. The reasonable evaluation of submarine ice load has become an urgent problem to be solved.
Liang Li +5 more
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SIMULATION OF MICROBUBBLE RESISTANCE REDUCTION ON A SUBOFF MODEL
Brodogradnja : An International Journal of Naval Architecture and Ocean Engineering for Research and Development, 2014 This paper presents a mixture-model based computational fluid dynamics (CFD) simulation on the two-phase microbubble flow over the hull of a SUBOFF model, aimed at assessing the roles of air-injection-to-freestream velocity ratio and air volume fraction in microbubble resistance reduction. The numerical framework consists of the Reynolds-average Navier-
Lyu, Xujian +4 more
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Numerical Self-Propulsion Assessment of a Generic Submarine Model at Various Forward Speeds
Journal of Eta Maritime Science, 2021 In this study, we use computational fluid dynamics (CFD) to investigate the self-propulsion characteristics of a submarine model. Predicting a marine vehicle’s self-propulsion features, and as a result, determining the thrust force required to drive the ...
Taner Çoşgun
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Numerical Study on the Influence of Rudder Fillets on Submarine Wake Field and Noise Characteristics
Journal of Marine Science and EngineeringThe submarine rudder configuration and arrangement significantly impact its hydrodynamic performance. This paper takes the SUBOFF standard submarine model as the research object, constructs a geometrically parameterized rudder fillet structure based on ...
Hao Yuan +3 more
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International Journal of Naval Architecture and Ocean Engineering, 2019 In order to provide a complementary perspective to the effects of the maneuvering motions on the unsteady propeller performance, the numerical simulation of the flow field of the hull-rudder- propeller system is performed by Unsteady Reynolds-averaged ...
Yu-cun Pan, Huai-xin Zhang, Qi-dou Zhou
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