Download or read book Feasibility of a Novel Electric Power Propulsion System nepps for a Submarine Volume Iii Hydrodynamic Model Tests written by A. J. Izzo and published by . This book was released on 1963 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the results of tests of a 1/28 scale model of a Novel Electric Power Propulsion System (NEPPS) and prediction of pro totype performance. Analysis of the test re sults leads to the following conclusions: (1) comparison of model cavitation data indicates that the cavitation performance of the NEPPS propeller is better than that of the conventional propeller; (2) torque measurements over a wide range of operating conditions indicate that propeller torque does not exceed the values originally assumed in the design of the elec trical machinery; (3) tests made at zero ad vance speed both for forward and reverse pro pulsor rotation indicates very good reverse thrust characteristics, the reverse thrust being 78% of the forward thrust; (4) the propulsive efficiency, based on the power at the blades of the model, is 90%; (5) self-propulsion was achieved at an advance ratio of 1.134; and (6) the NEPPS prototype submarine will attain a speed of approximately 24 knots. (Author).
Download or read book Notices of Changes in Classification Distribution and Availability written by and published by . This book was released on 1977 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Abstract Bulletin written by Defense Documentation Center (U.S.) and published by . This book was released on 1963 with total page 828 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Feasibility of MHD Submarine Propulsion Phase II MHD Propulsion written by and published by . This book was released on 1992 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the work performed during Phase 1 and Phase 2 of the collaborative research program established between Argonne National Laboratory (ANL) and Newport News Shipbuilding and Dry Dock Company (NNS). Phase I of the program focused on the development of computer models for Magnetohydrodynamic (MHD) propulsion. Phase 2 focused on the experimental validation of the thruster performance models and the identification, through testing, of any phenomena which may impact the attractiveness of this propulsion system for shipboard applications. The report discusses in detail the work performed in Phase 2 of the program. In Phase 2, a two Tesla test facility was designed, built, and operated. The facility test loop, its components, and their design are presented. The test matrix and its rationale are discussed. Representative experimental results of the test program are presented, and are compared to computer model predictions. In general, the results of the tests and their comparison with the predictions indicate that thephenomena affecting the performance of MHD seawater thrusters are well understood and can be accurately predicted with the developed thruster computer models.
Download or read book The Electric Propulsion of Ships written by Henry Metcalf Hobart and published by . This book was released on 1911 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electric Propulsion Development written by Ernst Stuhlinger and published by Elsevier. This book was released on 1963-01-01 with total page 763 pages. Available in PDF, EPUB and Kindle. Book excerpt: Progress in Astronautics and Aeronautics, Volume 9: Electric Propulsion Development covers the proceedings of the Second Electric Propulsion Conference of the American Rocker Society, held in Berkeley, California on March 14-16, 1962. The conference focuses on the existing problems in electric propulsion and their possible solutions. This book is organized into four sections encompassing 35 chapters. The first section deals with the thermodynamics of arcs; the problems of heat and momentum transfer; the chemical processes within arcs; the arc system materials; and the arc jet design problems. The second section considers the problems of ion systems, the various ion sources, and the neutralization of ion beams. This section also looks into the basic ionization processes, the production and charging of heavy particles, the corrosive properties of cesium, and the ion-optical designs. The third section describes various plasma systems, including helical transmission lines, pulsed pinch accelerators, coaxial systems, and j x B accelerators. The theoretical analyses of these systems are briefly examined. The fourth section includes papers on flight testing of electric propulsion models, on vertical rocket probes, and on satellites, This section also discusses some advanced concepts in electric propulsion, such as air scooping during ascent through the atmosphere, systems design and optimization, and planetary and interplanetary missions. This book is of great value to physicists, space engineers and designers, as well as researchers in the fields of astronautics and aeronautics.
Download or read book Feasibility of MHD Submarine Propulsion written by and published by . This book was released on 1992 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the work performed during Phase 1 and Phase 2 of the collaborative research program established between Argonne National Laboratory (ANL) and Newport News Shipbuilding and Dry Dock Company (NNS). Phase I of the program focused on the development of computer models for Magnetohydrodynamic (MHD) propulsion. Phase 2 focused on the experimental validation of the thruster performance models and the identification, through testing, of any phenomena which may impact the attractiveness of this propulsion system for shipboard applications. The report discusses in detail the work performed in Phase 2 of the program. In Phase 2, a two Tesla test facility was designed, built, and operated. The facility test loop, its components, and their design are presented. The test matrix and its rationale are discussed. Representative experimental results of the test program are presented, and are compared to computer model predictions. In general, the results of the tests and their comparison with the predictions indicate that thephenomena affecting the performance of MHD seawater thrusters are well understood and can be accurately predicted with the developed thruster computer models.
Download or read book Impacts of Electric Propulsion Systems on Submarine Design written by Michael Alfred Ballard and published by . This book was released on 1989 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: A theoretical study was carried out on the effects of replacing submarine turbine-reduction gear propulsion drive systems with an equivalent electric drive system. Alternating current (A.C.) and direct current (D.C.) systems were designed using computer based machine synthesis programs. The systems considered included direct drive motors operating at the speed of the submarine drive shaft and motors operating at higher speeds in conjunction with integral single stage reduction gears. Methods to improve the efficiency of the various motors for speeds other than rated speed were examined. The impacts of the electric system designs were evaluated in terms of the ability of a mechanical drive submarine design to accept the replacement of the mechanical components with the equivalent electric components and meet standard submarine design closure criteria. All electric drive variants met the basic naval architectural feasibility requirements. Electric drive systems were heavier, required less arrangeable volume and were generally less efficient than the mechanical baseline ship. Gear reduced electric systems were lighter and more than the direct drive, low speed motor based systems. Electric submarine drive is a feasible alternative to conventional mechanical, locked train transmission systems. Electric drive installations carry penalties in terms of added weight and reduced propulsion plant efficiency that must be recognized and accepted by the ship designer. Keywords: Theses; Submarine engineering; Electric propulsion system.
Download or read book Electric Propulsion for Boats written by Charles A. Mathys and published by . This book was released on 2010-05 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: After years of researching, building and testing many designs, Charlie Mathys has found the answers to inexpensive "Electric Propulsion for Boats." This book starts with an overview of his successes and failures. With each success Charlie moves ahead until you have an excellent understanding of electric propulsion for boats. This book delves deeply into the technical aspects of electric propulsion. However the information remains extremely easy to understand. The book will take you through each phase of the required work thoroughly, with detailed explanations for each step along the way. You will not find another book that explains all aspects of this subject so completely or in such an easily understood format. Although Charlie has limited the examples to smaller boats, the processes can easily be modified for larger vessels. If you have an interest in quiet, clean and green propulsion for your boat, this book is the perfect place to start your project
Download or read book Feasibility of MHD Submarine Propulsion written by and published by . This book was released on 1992 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Electric Propulsion written by Jean L Broge and published by SAE International. This book was released on 2017-05-18 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aviation propulsion development continues to rely upon fossil fuels for the vast majority of commercial and military applications. Until these fuels are depleted or abandoned, burning them will continue to jeopardize air quality and provoke increased regulation. With those challenges in mind, research and development of more efficient and electric propulsion systems will expand. Fuel-cell technology is but one example that addresses such emission and resource challenges, and others, including negligible acoustic emissions and the potential to leverage current infrastructure models. For now, these technologies are consigned to smaller aircraft applications, but are expected to mature toward use in larger aircraft. Additionally, measures such as electric/conventional hybrid configurations will ultimately increase efficiencies and knowledge of electric systems while minimizing industrial costs. Requirements for greater flight time, stealth characteristics, and thrust-to-power ratios adds urgency to the development of efficient propulsion methods for applications such as UAVs, which looks to technologies such as asymmetrical capacitors to enhance electric propulsion efficiency. This book will take the reader through various technologies that will enable a more-electric aircraft future, as well as design methods and certification requirements of more-electric engines.
Download or read book Ship Resistance and Propulsion written by Anthony F. Molland and published by Cambridge University Press. This book was released on 2017-08-17 with total page 627 pages. Available in PDF, EPUB and Kindle. Book excerpt: This second edition provides a comprehensive and scientific approach to evaluating ship resistance and propulsion. Written by experts in the field, it includes the latest developments in CFD, experimental techniques and guidance for the practical estimation of ship propulsive power. It addresses improvements in energy efficiency and reduced emissions, and the introduction of the Energy Efficiency Design Index (EEDI). Descriptions have now been included of pump jets, rim driven propulsors, shape adaptive foils, propeller noise and dynamic positioning. Trial procedures have been updated, and preliminary estimates of power for hydrofoil craft, submarines and AUVs are incorporated. Standard series data for hull resistance and propeller performance are included, enabling practitioners to make ship power predictions based on material and data within the book. Numerous fully worked examples illustrate applications for most ship and small craft types, making this book ideal for practising engineers, naval architects, marine engineers and undergraduate and postgraduate students.
Download or read book Micro Electric Propulsion Feasibility written by and published by . This book was released on 1992 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ship Resistance and Propulsion written by Anthony F. Molland and published by Cambridge University Press. This book was released on 2011-08-08 with total page 569 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ship Resistance and Propulsion provides a comprehensive approach to evaluating ship resistance and propulsion. Informed by applied research, including experimental and CFD techniques, this book provides guidance for the practical estimation of ship propulsive power for a range of ship types. Published standard series data for hull resistance and propeller performance enables practitioners to make ship power predictions based on material and data contained within the book. Fully worked examples illustrate applications of the data and powering methodologies; these include cargo and container ships, tankers and bulk carriers, ferries, warships, patrol craft, work boats, planing craft and yachts. The book is aimed at a broad readership including practising naval architects and marine engineers, seagoing officers, small craft designers, undergraduate and postgraduate students. Also useful for those involved in transportation, transport efficiency and ecologistics who need to carry out reliable estimates of ship power requirements.
Download or read book Shipboard Propulsion Power Electronics and Ocean Energy written by MUKUND R. PATEL and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Speed and Power of Ships written by David Watson Taylor and published by . This book was released on 1943 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book My Electric Boats written by Charles A. Mathys and published by Netcam Publishing. This book was released on 2010-11 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: My Electric Boats is the 2nd Edition of the popular textbook Electric Propulsion for Boats. This updated version includes a new Rhodes 19/Etek conversion, plus more performance and efficiency tests, new photos and four complete step-by-step conversion chapters. Divided into three sections, the book starts with an overview of the author s successes and failures while researching basic concepts. With each success, he moves ahead until you have an excellent understanding of electric propulsion for boats. Delving deeply into all the technical aspects of electric propulsion, the book guides you thoroughly through each phase of the required work, with easy-to-follow explanations for each step. The examples and processes can be easily modified for small or larger vessels. If you have an interest in eco-friendly propulsion for your boat, this is the perfect place to start. www.myelectricboats.com --------- NEW to the Second Edition Four Electric Boat Conversions Convert a Rhodes 19 sailboat with a Lynch/Etek inboard Align the drive shaft electrically Four How-To Chapters More Performance and Efficiency Tests More Photos -------- For anyone with practical skills who wishes to get deeply involved in building or modifying boats, or experimenting with AC drives, this should be a goldmine. Paul Lynn, Electric Boat News review of Electric Propulsion for Boats, First Edition
