The Experts below are selected from a list of 7836 Experts worldwide ranked by ideXlab platform
Alfred S Mclaren - One of the best experts on this subject based on the ideXlab platform.
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contour mapping of arctic basin ice draft and roughness parameters
Journal of Geophysical Research, 1992Co-Authors: Robert H Bourke, Alfred S MclarenAbstract:A data base of ice draft and roughness parameters has been constructed for selected portions of the Arctic Ocean based upon analysis of under-ice draft distribution data acquired by inverted echo sounder systems on Submarines. From the voyages of 12 Submarines which traversed the Alaskan, Canadian, and central Arctic regions of the Arctic Ocean during the summer and winter seasons, a series of mean ice draft and deep-draft keel statistics was calculated for 50-km segments along each submarine track. Contour maps of the mean ice draft, its standard deviation, the mean keel draft, and the spatial frequency of ice keels were constructed. They show that the greatest ice drafts, the roughest ice, and the greatest number of deep-draft keels are found off the north coasts of the Canadian Archipelago and Greenland due to ice convergence on these land barriers.
Yongseog Ko - One of the best experts on this subject based on the ideXlab platform.
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analysis of a submarine s evasive capability against an antisubmarine warfare torpedo using devs modeling and simulation
Spring Simulation Multiconference, 2007Co-Authors: Jungho Kang, Yongseog KoAbstract:The evasive capability of a costal conventional submarine against a light antisubmarine warfare (ASW) torpedo has been studied. The simulation systems are first analyzed and designed using Unified Modeling Language (UML). Then, the ASW torpedo, submarine, decoy and jammer model are developed using DEVS formalism and simulated in DEVSim++. We analyzed the submarine's evasive performance according to its maximum speed and acceleration as well as the sonar range of the ASW torpedo. We expect the results to be useful for the simulation based acquisition (SBA) of a submarine system.
Er Ursalov - One of the best experts on this subject based on the ideXlab platform.
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effective depth of regular wave on submerged Submarines and auvs
International Conference on Robotics and Automation, 2017Co-Authors: Mohammad Moonesun, Firouz Ghasemzadeh, Yuri Mikhailovich Korol, Nikrasov Valeri, Alexi Yastreba, Er UrsalovAbstract:This paper evaluates the effective depth of waves on the submarine at the depth of water At the depth called the quot Wave Base quot which equals to l the wave effects become so small that motions are negligible This paper aimed to recommend a minimum safe depth for calm and stable motions of a submarine This paper concludes the depth of lcould be recommended as an operational safe and approximately calm depth for Submarines For this study a torpedo shaped submersible is analyzed in some depths accompanying by regular surface wave By increasing the depth the reduction of submarine motions is evaluated The results of this research can be used for AUVs research submersibles and naval Submarines This analysis is performed by CFD tools of Flow D V software based on solving the RANS equations and VOF method
Mohammad Moonesun - One of the best experts on this subject based on the ideXlab platform.
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effective depth of regular wave on submerged Submarines and auvs
International Conference on Robotics and Automation, 2017Co-Authors: Mohammad Moonesun, Firouz Ghasemzadeh, Yuri Mikhailovich Korol, Nikrasov Valeri, Alexi Yastreba, Er UrsalovAbstract:This paper evaluates the effective depth of waves on the submarine at the depth of water At the depth called the quot Wave Base quot which equals to l the wave effects become so small that motions are negligible This paper aimed to recommend a minimum safe depth for calm and stable motions of a submarine This paper concludes the depth of lcould be recommended as an operational safe and approximately calm depth for Submarines For this study a torpedo shaped submersible is analyzed in some depths accompanying by regular surface wave By increasing the depth the reduction of submarine motions is evaluated The results of this research can be used for AUVs research submersibles and naval Submarines This analysis is performed by CFD tools of Flow D V software based on solving the RANS equations and VOF method
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cfd analysis on the bare hull form of Submarines for minimizing the resistance
International Journal of Maritime Technology, 2015Co-Authors: Mohammad Moonesun, Yuri Mikhailovich Korol, Hosein DalayeliAbstract:Article History: Received: 21 Oct. 2014 Accepted: 14 Apr. 2015 Available online: 20 Jun. 2015 In this paper, a CFD analysis on the bare hull form of Submarines or torpedoes for minimizing the resistance is represented. There are several parameters in submarine form design which the most important parameter is resistance. All operational characteristics of Submarines are related to the resistance, related required power and then, underwater speed and range. Other parameters are only mentioned. In this paper, the bare hull form is only studied without appendages. About seventy percent of the total resistance, is dedicated to the bare hull. The bare hull has three main parts: bow, cylinder and stern. The most real naval Submarines and ROVs have parallel middle body form. Thus in this study, the focus is on this type of hull. The equations of bow and stern form are studied, as well. This paper, has studied the several forms by changing the coefficients of equations. CFD analyses are performed on these shapes for achieving the minimum resistance. The ratio of length on diameter (L/D) is another parameter which is studied in this paper. This analysis is conducted by Flow Vision (V.2.3) software based on CFD method and solving the RANS equations. All analyses are performed for underwater navigation, without free surface effect because, the required power is estimated always by submerged mode of navigation.
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introduction of iranian hydrodynamic series of Submarines ihss
中國造船暨輪機工程學刊, 2014Co-Authors: Mohammad MoonesunAbstract:This paper introduces and describes Iranian hydrodynamic series of Submarines (IHSS) and for describing this series the submarine geometry and non-dimensional ratios are described. IHSS is a new Simple and useful instrument for hydrodynamic design of submarine that is introduced in this paper for first time. Standard series for ships and boats have been very common and applicable such as Series 60, Series 62 and Series 64, but for describing the hull of submarine there have not ever been any series. IHSS uses a special 15 digit code for each submarine hull and each code generally describes the geometry. The manner of this coding is presented in this paper. The main advantage of IHSS compared to other standard series is the presentation of hydrodynamic characteristics such as hydrodynamic coefficients for designing and calculating the maneuvering and resistance. Because of that, IHSS is named a hydrodynamic series. The main basis of this series for providing hydrodynamic characteristics is CFO method but in some cases the physical model test results will be used to validation of the results. In this paper only the general discussions about IHSS and coding are presented and the hydrodynamic results will be present in next papers. For providing general application of this series for all arbitrary tonnages and dimensions, descriptions of geometries are, firstly based on non-dimensional ratios and secondly, the geometries are considered as simple as possible so that the designers can select initial geometry from IHSS as a base and then the variations can be applied on it. Basis of submarine shape in IHSS is parallel middle body shape because the most usual shapes of today's Submarines are such. The end part is conical without propeller, and the bow is elliptical.
Javier Llabres - One of the best experts on this subject based on the ideXlab platform.
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methanol reformer the next milestone for fuel cell powered Submarines
International Journal of Hydrogen Energy, 2015Co-Authors: Stefan Krummrich, Javier LlabresAbstract:Abstract All Submarines with fuel cells built until today are based on hydrogen storage in metal hydride storage cylinders. This technology offers many advantages regarding the special requirements of Submarines, but the AIP energy that can be stored onboard is limited due to the high weight of the metal hydride storage cylinders – a submarine can only carry a limited number of hydrogen storage cylinders. This technology is therefore limited to small-medium sized Submarines. The navies future demand tendency is to develop bigger sized Submarines. This potential problem is solved if the hydrogen is produced onboard, instead of being stored in metal hydride form. A methanol reforming technology development is applied to obtain the hydrogen for the Fuel Cell to power the submarine. This article gives an overview about the methanol reforming development goals, the current status and the further steps to achieve a fully submarine-proven system layout.
