Propulsion System Choices for Modern Naval Vessels MTU: Partner of Navies (Example German Navy)
Total Page：16
File Type：pdf, Size：1020Kb
Load more
Recommended publications
-
The Propulsion of Sea Ships – in the Past, Present and Future –
The Propulsion of Sea Ships – in the Past, Present and Future – (Speech by Bernd Röder on the occasion of the VHT General Meeting on 11.12.2008) To prepare for today’s topic, more specifically for the topic: ship propulsion of the future, I did what every reasonable person would have done in my situation if he should have a look into the future – I dug out our VHT crystal ball. As you know, our crystal ball is a reliable and cost-efficient resource which we have been using for a long time with great suc- cess. Among other things, we’ve been using it to provide you with the repair costs or their duration or the probable claims experience of a policy, etc. or to create short-term damage statistics, as well. So, I asked the crystal ball: What does ship propulsion of the future look like? Every future and all statistics lie in the crystal ball I must, however, admit that what I saw there was somewhat irritating, and it led me to only the one conclusion – namely, that we’re taking a look into the very distant future at a time in which humanity has not only used up all of the oil reserves but also the entire wind. This time, we’re not really going to get any further with the crystal ball. Ship propulsion of the future or 'back to the roots'? But, sometimes it helps to have a look into the past to be able to say something about the fu- ture. According to the principle, draw a line connecting the distant past to today and simply extend it into the future. -
Rocket Nozzles: 75 Years of Research and Development
Sådhanå Ó (2021) 46:76 Indian Academy of Sciences https://doi.org/10.1007/s12046-021-01584-6Sadhana(0123456789().,-volV)FT3](0123456789().,-volV) Rocket nozzles: 75 years of research and development SHIVANG KHARE1 and UJJWAL K SAHA2,* 1 Department of Energy and Process Engineering, Norwegian University of Science and Technology, 7491 Trondheim, Norway 2 Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Guwahati 781039, India e-mail: [email protected]; [email protected] MS received 28 August 2020; revised 20 December 2020; accepted 28 January 2021 Abstract. The nozzle forms a large segment of the rocket engine structure, and as a whole, the performance of a rocket largely depends upon its aerodynamic design. The principal parameters in this context are the shape of the nozzle contour and the nozzle area expansion ratio. A careful shaping of the nozzle contour can lead to a high gain in its performance. As a consequence of intensive research, the design and the shape of rocket nozzles have undergone a series of development over the last several decades. The notable among them are conical, bell, plug, expansion-deflection and dual bell nozzles, besides the recently developed multi nozzle grid. However, to the best of authors’ knowledge, no article has reviewed the entire group of nozzles in a systematic and comprehensive manner. This paper aims to review and bring all such development in one single frame. The article mainly focuses on the aerodynamic aspects of all the rocket nozzles developed till date and summarizes the major findings covering their design, development, utilization, benefits and limitations. -
The Heroic Destroyer and "Lucky" Ship O.R.P. "Blyskawica"
Transactions on the Built Environment vol 65, © 2003 WIT Press, www.witpress.com, ISSN 1743-3509 The heroic destroyer and "lucky" ship O.R.P. "Blyskawica" A. Komorowski & A. Wojcik Naval University of Gdynia, Poland Abstract The destroyer O.R.P. "Blyskawica" is a precious national relic, the only remaining ship that was built before World War I1 (WW2). On the 5oth Anniversary of its service under the Polish flag, it was honoured with the highest military decoration - the Gold Cross of the Virtuti Militari Medal. It has been the only such case in the whole history of the Polish Navy. Its our national hero, war-veteran and very "lucky" warship. "Blyskawica" took part in almost every important operation in Europe throughout WW2. It sailed and covered the Baltic Sea, North Sea, all the area around Great Britain, the Atlantic Ocean and Mediterranean Sea. During the war "Blyskawica" covered a distance of 148 thousand miles, guarded 83 convoys, carried out 108 operational patrols, participated in sinking two warships, damaged three submarines and certainly shot down four war-planes and quite probably three more. It was seriously damaged three times as a result of operational action. The crew casualties aggregated to a total of only 5 killed and 48 wounded petty officers and seamen, so it was a very "lucky" ship during WW2. In July 1947 the ship came back to Gdynia in Poland and started training activities. Having undergone rearmament and had a general overhaul, it became an anti-aircraft defence ship. In 1976 it replaced O.R.P. "Burza" as a Museum-Ship. -
Propulsion and Flight Controls Integration for the Blended Wing Body Aircraft
Cranfield University Naveed ur Rahman Propulsion and Flight Controls Integration for the Blended Wing Body Aircraft School of Engineering PhD Thesis Cranfield University Department of Aerospace Sciences School of Engineering PhD Thesis Academic Year 2008-09 Naveed ur Rahman Propulsion and Flight Controls Integration for the Blended Wing Body Aircraft Supervisor: Dr James F. Whidborne May 2009 c Cranfield University 2009. All rights reserved. No part of this publication may be reproduced without the written permission of the copyright owner. Abstract The Blended Wing Body (BWB) aircraft offers a number of aerodynamic perfor- mance advantages when compared with conventional configurations. However, while operating at low airspeeds with nominal static margins, the controls on the BWB aircraft begin to saturate and the dynamic performance gets sluggish. Augmenta- tion of aerodynamic controls with the propulsion system is therefore considered in this research. Two aspects were of interest, namely thrust vectoring (TVC) and flap blowing. An aerodynamic model for the BWB aircraft with blown flap effects was formulated using empirical and vortex lattice methods and then integrated with a three spool Trent 500 turbofan engine model. The objectives were to estimate the effect of vectored thrust and engine bleed on its performance and to ascertain the corresponding gains in aerodynamic control effectiveness. To enhance control effectiveness, both internally and external blown flaps were sim- ulated. For a full span internally blown flap (IBF) arrangement using IPC flow, the amount of bleed mass flow and consequently the achievable blowing coefficients are limited. For IBF, the pitch control effectiveness was shown to increase by 18% at low airspeeds. -
The Future of European Naval Power and the High-End Challenge Jeremy Stöhs
Jeremy Stöhs ABOUT THE AUTHOR Dr. Jeremy Stöhs is the Deputy Director of the Austrian Center for Intelligence, Propaganda and Security Studies (ACIPSS) and a Non-Resident Fellow at the Institute for Security Policy, HOW HIGH? Kiel University. His research focuses on U.S. and European defence policy, maritime strategy and security, as well as public THE FUTURE OF security and safety. EUROPEAN NAVAL POWER AND THE HIGH-END CHALLENGE ISBN 978875745035-4 DJØF PUBLISHING IN COOPERATION WITH 9 788757 450354 CENTRE FOR MILITARY STUDIES How High? The Future of European Naval Power and the High-End Challenge Jeremy Stöhs How High? The Future of European Naval Power and the High-End Challenge Djøf Publishing In cooperation with Centre for Military Studies 2021 Jeremy Stöhs How High? The Future of European Naval Power and the High-End Challenge © 2021 by Djøf Publishing All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means – electronic, mechanical, photocopying, recording or otherwise – without the prior written permission of the Publisher. This publication is peer reviewed according to the standards set by the Danish Ministry of Higher Education and Science. Cover: Morten Lehmkuhl Print: Ecograf Printed in Denmark 2021 ISBN 978-87-574-5035-4 Djøf Publishing Gothersgade 137 1123 København K Telefon: 39 13 55 00 e-mail: [email protected] www. djoef-forlag.dk Editors’ preface The publications of this series present new research on defence and se- curity policy of relevance to Danish and international decision-makers. -
Spacecraft Propulsion
SPACECRAFT PROPULSION WITH THRUST AND PRECISION INTO SPACE SPACECRAFT PROPULSION THRUST AND PRECISION INTO SPACE ArianeGroup is a market leader in spacecraft propulsion systems and equipment. Since over 50 years, customers worldwide benefit from a competitive portfolio of high quality products and services. We cover the complete range of products and services related to orbital propulsion, from chemical monopropellant systems for smaller satellites to chemical bipropellant systems for larger platforms and completed with the electric propulsion portfolio based on the RIT technology. At ArianeGroup, customers have a single point of contact for the complete propulsion system at all phases of the value chain. From system design up to after-launch services. All key equipment of ArianeGroup propulsion systems (thrusters, propellant tanks and fluidic equipment) are produced in-house. 2 ALL ABOUT PRECISION With our orbital propulsion thrusters and engines our customers can be ensured that their mission requirements related to propulsion will be fulfilled with accurate precision. Our biggest orbital propulsion thruster, the 400N apogee engine, has placed hundreds of satellites in its final orbit With micro precision the RIT µX thruster brings space missions to the exact orbit 2 3 SPACECRAFT PROPULSION ELECTRIC PROPULSION Radio frequency ion propulsion for orbit raising, station keeping and deep space missions ArianeGroup’s electric space propulsion expertise is based on the space proven Radio Frequency Ion Technology (RIT). Within this field, we produce complete propulsion systems, modules, thrusters and related components. This technology features numerous advantages like high specific impulse therefore maximum propellant saving. Low system complexity is another strength of the RIT Technology. -
Three Gray Classics on the Biomechanics of Animal Movement
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Harvard University - DASH Three Gray Classics on the Biomechanics of Animal Movement The Harvard community has made this article openly available. Please share how this access benefits you. Your story matters Citation Lauder, G. V., Eric Tytell. 2004. Three Gray Classics on the Biomechanics of Animal Movement. Journal of Experimental Biology 207, no. 10: 1597–1599. doi:10.1242/jeb.00921. Published Version doi:10.1242/jeb.00921 Citable link http://nrs.harvard.edu/urn-3:HUL.InstRepos:30510313 Terms of Use This article was downloaded from Harvard University’s DASH repository, and is made available under the terms and conditions applicable to Other Posted Material, as set forth at http:// nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of- use#LAA JEB Classics 1597 THREE GRAY CLASSICS locomotor kinematics, muscle dynamics, JEB Classics is an occasional ON THE BIOMECHANICS and computational fluid dynamic column, featuring historic analyses of animals moving through publications from The Journal of OF ANIMAL MOVEMENT water. Virtually every recent textbook in Experimental Biology. These the field either reproduces one of Gray’s articles, written by modern experts figures directly or includes illustrations in the field, discuss each classic that derive their inspiration from his paper’s impact on the field of figures (e.g. Alexander, 2003; Biewener, biology and their own work. A 2003). PDF of the original paper accompanies each article, and can be found on the journal’s In his 1933a paper, Gray aimed to website as supplemental data. -
Naval Craft, Weapon and Sensor Systems
++ I&S NAVAL CRAFT, WEAPON AND SENSOR SYSTEMS Fr. Lürssen Werft Abstract: The article provides an inside view on trends in technology of current and future naval construction programmes as seen by Lürssen, the German shipyard for naval vessels located in Bremen, Germany. The changing operational require- ments recognised in many western European and overseas navies focus on a surface combatant such as a corvette-sized ship with advanced capabilities to meet the spe- cific demands for littoral warfare operations. Based on these new requirements the article outlines technologies in current and future designs for Corvette- and Frigate- sized ships. It includes different types of platforms together with their specific benefits and capabilities for the intended employment in littoral warfare. In addi- tion, measures to reduce the ship’s signatures for enhanced survivability are broadly discussed. With respect to adequate sea-keeping, manoeuvrability, speed and en- durance (properties) in the littoral environment, the article also expands on the de- velopment and characteristics of new propulsion systems emphasising the overall need for a high degree of automation in all system components. The discussion on modern combat system technology once again underlines the need for a modular and flexible system design with open system architecture. The highest possible level of system automation reducing the number of personnel in the CIC and en- suring immediate reaction in a threat scenario is a further topic. Full integration of all sensors and weapons coupled with proven operational software is the essential technical requirement in this context. Finally, the article comments on some eco- nomical aspects of current building philosophies touching thereby on possibilities for crew reduction, costs reduction, potential capabilities for midlife refit, and growth potential. -
GE Marine Gas Turbine Propulsion for Frigates
GE Marine Gas Turbines for Frigates March 2018 GE’s Marine Solutions One Neumann Way MD S156 Cincinnati, Ohio USA 45215 www.ge.com/marine GE Marine Gas Turbines for Frigates Introduction The important role of a frigate is to escort and protect other high value fleet and merchant ships the world over. Frigates operate independently and possess sufficient capabilities (i.e. anti-submarine, anti-ship and anti-air) to provide missions in maritime and wartime environments. With GE being the market leader in the supply of marine propulsion gas turbines and seeing the proliferation in the demand for frigates, we wanted to know how our gas turbines and product roadmap compared to the needs of frigates. Before we could answer that question, we needed to answer the following two questions: 1. What are propulsion trends for frigates? 2. What are key attributes or requirements, and how do they translate to gas turbine propulsion characteristics? The key attributes of a frigate were taken from the July 2017 United States Navy Future Guided Missile Frigate (FFG(X)) Request for Information (RFI). It is anticipated the attributes would be common to many of the world’s frigates. Frigate Propulsion Trends and GE LM2500 Family Gas Turbine Suitability GE performed an analysis of all the frigates built since 1960 excluding certain countries such as Russia and China. Classification of a ship as a frigate is a gray area as there is blending of smaller corvettes and larger destroyers. For this analysis, we used the Wikipedia listing of frigates. All of the following ship data was obtained from public information such as Wikipedia and IHS Jane’s Fighting Ships. -
Alexander 2013 Principles-Of-Animal-Locomotion.Pdf
.................................................... Principles of Animal Locomotion Principles of Animal Locomotion ..................................................... R. McNeill Alexander PRINCETON UNIVERSITY PRESS PRINCETON AND OXFORD Copyright © 2003 by Princeton University Press Published by Princeton University Press, 41 William Street, Princeton, New Jersey 08540 In the United Kingdom: Princeton University Press, 3 Market Place, Woodstock, Oxfordshire OX20 1SY All Rights Reserved Second printing, and first paperback printing, 2006 Paperback ISBN-13: 978-0-691-12634-0 Paperback ISBN-10: 0-691-12634-8 The Library of Congress has cataloged the cloth edition of this book as follows Alexander, R. McNeill. Principles of animal locomotion / R. McNeill Alexander. p. cm. Includes bibliographical references (p. ). ISBN 0-691-08678-8 (alk. paper) 1. Animal locomotion. I. Title. QP301.A2963 2002 591.47′9—dc21 2002016904 British Library Cataloging-in-Publication Data is available This book has been composed in Galliard and Bulmer Printed on acid-free paper. ∞ pup.princeton.edu Printed in the United States of America 1098765432 Contents ............................................................... PREFACE ix Chapter 1. The Best Way to Travel 1 1.1. Fitness 1 1.2. Speed 2 1.3. Acceleration and Maneuverability 2 1.4. Endurance 4 1.5. Economy of Energy 7 1.6. Stability 8 1.7. Compromises 9 1.8. Constraints 9 1.9. Optimization Theory 10 1.10. Gaits 12 Chapter 2. Muscle, the Motor 15 2.1. How Muscles Exert Force 15 2.2. Shortening and Lengthening Muscle 22 2.3. Power Output of Muscles 26 2.4. Pennation Patterns and Moment Arms 28 2.5. Power Consumption 31 2.6. Some Other Types of Muscle 34 Chapter 3. -
Space Flight Dynamics, 2Nd Edition Craig A
To purchase this product, please visit https://www.wiley.com/en-az/9781119157823 Space Flight Dynamics, 2nd Edition Craig A. Kluever E-Book 978-1-119-15784-7 March 2018 €83.99 Hardcover 978-1-119-15782-3 March 2018 €93.30 DESCRIPTION Thorough coverage of space flight topics with self-contained chapters serving a variety of courses in orbital mechanics, spacecraft dynamics, and astronautics This concise yet comprehensive book on space flight dynamics addresses all phases of a space mission: getting to space (launch trajectories), satellite motion in space (orbital motion, orbit transfers, attitude dynamics), and returning from space (entry flight mechanics). It focuses on orbital mechanics with emphasis on two-body motion, orbit determination, and orbital maneuvers with applications in Earth-centered missions and interplanetary missions. Space Flight Dynamics presents wide-ranging information on a host of topics not always covered in competing books. It discusses relative motion, entry flight mechanics, low-thrust transfers, rocket propulsion fundamentals, attitude dynamics, and attitude control. The book is filled with illustrated concepts and real-world examples drawn from the space industry. Additionally, the book includes a “computational toolbox” composed of MATLAB M-files for performing space mission analysis. Key features: • Provides practical, real-world examples illustrating key concepts throughout the book • Accompanied by a website containing MATLAB M-files for conducting space mission analysis • Presents numerous space flight topics absent in competing titles Space Flight Dynamics is a welcome addition to the field, ideally suited for upper-level undergraduate and graduate students studying aerospace engineering. ABOUT THE AUTHOR Craig A. Kluever is C. -
Interactions Between Flight Dynamics and Propulsion Systems of Air-Breathing Hypersonic Vehicles
Interactions between Flight Dynamics and Propulsion Systems of Air-Breathing Hypersonic Vehicles by Derek J. Dalle A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy (Aerospace Engineering) in the University of Michigan 2013 Doctoral Committee: Professor James F. Driscoll, Chair Michael A. Bolender, Air Force Research Laboratory Associate Professor Joaquim R. R. A. Martins Assistant Professor David J. Singer ©Derek J. Dalle 2013 DEDICATION This dissertation is dedicated to Sara Spangelo, who showed me that graduate school is more than fun, games, doing re- search, and writing papers. Among other things, it was also a lot of running, eating, running, and making pretty graph- ics. She also strongly recommended that I dedicate this dis- sertation to her. ii Acknowledgments I would like to thank Professor Driscoll for guiding me through the Ph.D. program and being a great advisor. My experience here was about as close to perfect as I could hope to expect, and Jim is more responsible for that than anyone else. My colleague Dr. Sean M. Torrez, who was also a Ph.D. student of Professor Driscoll, was essential in the creation of the MASIV and MASTrim models. Also, we made a very good team. I would also like to thank my committee for their support and work in reviewing my thesis. This research was funded by the Air Force Research Laboratory/Air Vehicles Directorate grant FA 8650-07-2-3744 for the Michigan/AFRL Collaborative Center in Control Sciences. iii TABLE OF CONTENTS Dedication ....................................... ii Acknowledgments ................................... iii List of Figures ....................................