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Resistance Predictions For A High Speed Sealift Trimaran
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Book Synopsis Resistance Predictions for a High-speed Sealift Trimaran by : K. J. Maki
Download or read book Resistance Predictions for a High-speed Sealift Trimaran written by K. J. Maki and published by . This book was released on 2007 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this work is to compare the capability of two different numerical techniques for predicting the calm-water resistance of a high-speed sealift trimaran. The vessel is representative of a future advanced naval design that must be able to travel long distances with heavy payloads, but is constrained geometrically in order to operate in austere ports upon arrival. It has a relatively shallow draft and has an extendable center hull that possesses a wave-piercing bow. This particular design has hulls that are of essentially equal dimensions. For comparison of the codes, a series of large-scale model tests was conducted for six different configurations of the three hulls (variations of overall vessel beam and length). A thin-ship theory is shown to be effective in predicting resistance. Results for both the absolute value and the relative change in resistance due to change in the hull configuration, together with the computational efficacy of the method demonstrate utility for the designer. The complex effect on the resistance due to the proximity of the three hulls is addressed in a first-principle manner to enhance the prediction from the thin-ship theory. The commercial computational fluid dynamics code FLUENT is shown to more accurately predict the resistance when the calculations are performed with the body fixed at the experimental sinkage and trim. The temporal expense associated with computational fluid dynamics is reduced in this study by using very simple computational grids. Also, the solution convergence is enhanced by using polyhedral finite volumes which improve cell skewness.
Download or read book HSMV 2020 written by E. Begovic and published by IOS Press. This book was released on 2020-11-03 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the proceedings of the 12th International Symposium on High Speed Marine Vehicles, held virtually as an e-conference for the first time on 15 and 16 October 2020. High Speed Marine Vehicles Conference has almost 30-year history since the first Conference held in Naples in 1991. Since then, it has been an opportunity to present and discuss developments in the design, construction and operation of High Speed Marine Vessels. More than 40 abstracts were submitted for this edition of the conference, and following a rigorous review process, 26 papers were selected for inclusion in this book. These have been divided into 7 sections: CFD/EFD/sea trials; hydrofoils; multi-hull hydrodynamics; planing-hull hydrodynamics; propulsion and ship machinery; second generation intact stability criteria; and structures, loads, strength and materials. Topics covered include updated aspects of and developments in ship design, numerical and experimental hydrodynamics, seakeeping and maneuvering, and marine structures and machinery. This publication will be of interest to researchers from academia, industry, government agencies and certifying authorities, as well as designers and operators of high-speed vessels.
Book Synopsis Marine Design XIII by : Pentti Kujala
Download or read book Marine Design XIII written by Pentti Kujala and published by CRC Press. This book was released on 2018-06-11 with total page 1144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Marine Design XIII collects the contributions to the 13th International Marine Design Conference (IMDC 2018, Espoo, Finland, 10-14 June 2018). The aim of this IMDC series of conferences is to promote all aspects of marine design as an engineering discipline. The focus is on key design challenges and opportunities in the area of current maritime technologies and markets, with special emphasis on: • Challenges in merging ship design and marine applications of experience-based industrial design • Digitalisation as technological enabler for stronger link between efficient design, operations and maintenance in future • Emerging technologies and their impact on future designs • Cruise ship and icebreaker designs including fleet compositions to meet new market demands To reflect on the conference focus, Marine Design XIII covers the following research topic series: •State of art ship design principles - education, design methodology, structural design, hydrodynamic design; •Cutting edge ship designs and operations - ship concept design, risk and safety, arctic design, autonomous ships; •Energy efficiency and propulsions - energy efficiency, hull form design, propulsion equipment design; •Wider marine designs and practices - navy ships, offshore and wind farms and production. Marine Design XIII contains 2 state-of-the-art reports on design methodologies and cruise ships design, and 4 keynote papers on new directions for vessel design practices and tools, digital maritime traffic, naval ship designs, and new tanker design for arctic. Marine Design XIII will be of interest to academics and professionals in maritime technologies and marine design.
Book Synopsis Transactions - The Society of Naval Architects and Marine Engineers by : Society of Naval Architects and Marine Engineers (U.S.)
Download or read book Transactions - The Society of Naval Architects and Marine Engineers written by Society of Naval Architects and Marine Engineers (U.S.) and published by . This book was released on 2007 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: List of members in vols. 1-24, 38-54, 57.
Book Synopsis Hydrodynamics of Advanced High-speed Sealift Vessels by : Leo Victor Lazauskas
Download or read book Hydrodynamics of Advanced High-speed Sealift Vessels written by Leo Victor Lazauskas and published by . This book was released on 2005 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is at present great interest in large ships capable of carrying substantial cargo at speeds in excess of 40 knots. At the same time, there are large gaps in our understanding of the hydrodynamics, structural engineering, and economics of high-speed vessels. Monohulls, catamarans, trimarans, surface effect ships, and air cushion vehicles are considered in the present work. The total resistance of these vehicles is divided into separate components which are estimated using different methods. Skin-friction is estimated using Grigson's algorithm which gives much better predictions of flat plate skin-friction than the traditional ITTC method. Wave resistance of displacement hulls is estimated using Michell's thin-ship theory: a similar theory is used for the wave resistance of travelling pressure distributions. Several simple formulae are derived that can be used in the preliminary design stage of catamarans to estimate optimum demihull separation. Memetic algorithm techniques are used to find vessels with minimum (calm-water) total resistance. Optimal geometric parameters are found for vessels of 1200 tonnes under a variety of geometric limitations and constraints on upright stability, at design speeds of 50 knots and 75 knots. Estimates are made of the principal weight components of the optimal vessels. Empirical formulae for the efficiencies of powerplants and propulsors then enable estimates to be made of the maximum range, the cargo capacity, and the fuel consumption.
Book Synopsis Wave Making Resistance Characteristics of Trimaran Hulls by : Zafer Elcin
Download or read book Wave Making Resistance Characteristics of Trimaran Hulls written by Zafer Elcin and published by . This book was released on 2003-12-01 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recently, there has been an increased demand for high speed vessels both for military and commercial applications. Many navies are exploring the potential of novel hull forms as part of efforts to achieve transformation in both combat and logistics missions in littoral seas. This demand for high speed vessels has resulted in a need for unconventional hull forms in order to balance speed with payload requirements. One such hull form is the trimaran. The purpose of this thesis is to investigate the effects of side hull position on the wave making resistance characteristics of powered trimarans. Resistance calculations were performed by a three dimensional, Rankine panel code. A systematic series of runs was conducted in order to classify ship resistance in forms of major trimaran hull geometric configurations. The results of this thesis can be directly utilized in design, in order to minimize ship resistance, and maximize available payload.
Book Synopsis Theoretical resistance prediction for high speed catamarans by : Andrew M. Salomon
Download or read book Theoretical resistance prediction for high speed catamarans written by Andrew M. Salomon and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Maritime Information Review written by and published by . This book was released on 2000 with total page 744 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of a CFD Program AEGIR (trademark) for Bare Hull Resistance and Seakeeping Prediction Capability by :
Download or read book Evaluation of a CFD Program AEGIR (trademark) for Bare Hull Resistance and Seakeeping Prediction Capability written by and published by . This book was released on 2009 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this study, a 3D potential flow, panel method based CFD tool called AEGIR(trademark) was assessed for predicting bare hull resistance and seakeeping performance. The program was run on mid-range personal computers, and analyses were performed on few different hullforms including the Joint High Speed Sealift (JHSS) monohull, a catamaran, a trimaran and a hard-chined semi-displacement monohull. Two different bow configurations, an elliptical shaped bulb and a gooseneck shaped bulb, were considered for the JHSS monohull bare hull resistance. For the catamaran and trimaran hullforms, the demihull and the center hull alone configurations were also considered for bare hull resistance. Measured data from model tests was used as a benchmark for validation. The focus was mainly on bare hull resistance with a very limited study on seakeeping. For all the hullforms and configurations, the coefficient of residuary resistance, sinkage and trim over a range of Froude numbers in calm water were obtained in AEGIR(trademark) and compared with model test results. A limited set of seakeeping runs were performed in AEGIR(trademark) on JHSS Monohull with gooseneck bulb and the catamaran demihull to obtain heave and pitch RAOs in regular head sea waves. The correlation between AEGIR(trademark) and model test results for calm water performance (bare hull resistance, sinkage and trim) was excellent for the JHSS monohull configurations but was poor for other hullforms studied. The results are inconclusive for seakeeping assessment due to limited number of studies. The overall conclusion is that AEGIR(trademark) performs well to predict calm water and head sea seakeeping performance for hullforms with small or no transoms.
Download or read book Fast Ferry International written by and published by . This book was released on 2002 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Resistance prediction of high speed vessels using regression analysis by : Malcolm Waugh
Download or read book Resistance prediction of high speed vessels using regression analysis written by Malcolm Waugh and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Marine Technology and SNAME News by :
Download or read book Marine Technology and SNAME News written by and published by . This book was released on 2005 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Theoretical Resistance Prediction of Modern High-speed Vessels by : Jesse Millar
Download or read book Theoretical Resistance Prediction of Modern High-speed Vessels written by Jesse Millar and published by . This book was released on 2004 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: Report for Bachelor of Engineering (Naval Architecture)
Book Synopsis The Routine of Discovery by : Edward G. Ballard
Download or read book The Routine of Discovery written by Edward G. Ballard and published by . This book was released on 1953 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Transactions of the Royal Institution of Naval Architects by : Royal Institution of Naval Architects
Download or read book Transactions of the Royal Institution of Naval Architects written by Royal Institution of Naval Architects and published by . This book was released on 2004 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: List of members in each volume.
Book Synopsis International Journal of Offshore and Polar Engineering by :
Download or read book International Journal of Offshore and Polar Engineering written by and published by . This book was released on 2008 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ship Technology Research written by and published by . This book was released on 2005 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
