| Description |
1 online resource (495 pages) |
| Contents |
Intro -- Preface -- Acknowledgements and Thanks -- Acknowledgements for Images and Data -- Contents -- About the Authors -- List of Figures -- List of Flow Charts -- List of Tables -- Chapter 1: Introduction -- 1.1 Resistance to Motion of Marine Vessels -- 1.2 Introduction to Air Lubrication and Air Cavity Vessels -- 1.2.1 Air Lubrication Displacement Ships -- Air Bubble Method -- Air Layer Method -- Air Cavity Method -- 1.2.2 High-Speed Air Cavity Craft -- Air Cavity Monohull -- Air Cavity Catamaran -- 1.3 Development of Displacement Air Lubrication Ships -- 1.3.1 Air Bubble Stream |
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1.3.2 MHI ̀MALS ́ -- 1.3.3 Foreship Air Lubrication System (ALS) -- 1.3.4 Silverstream Air Lubrication System -- 1.3.5 Developments and Trials Using Winged Air Induction Pipe -- 1.3.6 Air Layer Development at WTSRI, Shanghai -- 1.3.7 Samsung Heavy Industries ̀Saver Air ́ -- 1.4 Development of Displacement Air Cavity Ships -- 1.4.1 Developments in Russia -- 1.4.2 Stena Air Cavity Ship Research -- 1.4.3 Damen Ecoliner ACES and DACS -- 1.5 Development of High-Speed Air Cavity Craft -- 1.5.1 Opportunities and Challenges -- Opportunities -- Challenges -- 1.5.2 Developments in Russia |
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1.5.3 Developments in USA, Norway, and European Union -- 1.5.4 Developments in China -- 1.6 Closing Out -- References -- Chapter 2: Reducing Friction Resistance -- 2.1 Reducing Friction Resistance by Changing the Boundary Layer -- 2.1.1 Introduction -- 2.1.2 Suction of Boundary Layer with Aim of Preventing Its Separation from Ship Hull -- 2.1.3 Reducing Turbulence by Viscous-Elastic Coating -- 2.1.4 Using the Mechanism of the Running Wave -- 2.1.5 Introduction of Long Chain Polymer into Boundary Layer -- 2.2 Reducing Friction Resistance by Air Lubrication or Air Cavities |
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2.3 Concluding Thoughts -- References -- Chapter 3: Air Lubrication and Air Cavity Analysis -- 3.1 Introduction -- 3.2 Bubble Drag Reduction -- 3.2.1 Force Acting on a Bubble in the Boundary Layer -- 3.2.2 Downstream Persistence of BDR -- 3.2.3 Characteristics of Bubbly Flow Under the Surface -- 3.2.4 Scaling of BDR -- 3.3 Air Layer Drag Reduction -- 3.3.1 Transition from BDR to ALDR -- 3.3.2 Flow Characteristics of ALDR -- 3.3.3 Scaling of ALDR -- 3.4 Drag Reduction by Cavitation and Ventilated Cavities -- 3.4.1 Basic Parameters -- 3.4.2 Potential-Flow Solution for Cavity Geometry |
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3.4.3 Establishing and Maintaining a Cavity -- 3.5 Approach Developed in Russia for ̀Artificial ́Cavity Generation -- 3.5.1 Linear Theories of Gravitational Cavitation in a Fluid -- 3.5.2 Flow Around a Wedge under a Flat Surface -- 3.5.3 Cavitation Flow Around an Infinite Plane Wedge Under a Horizontal Plane -- 3.5.4 Calculation and Experimental Results -- 3.5.5 Flow Over a System of Infinite Straight Wedges Under a Horizontal Plane -- 3.6 Air Cavity Practical Application -- 3.7 Flow under a Planing Craft with a Cavity Under Its Bottom -- 3.7.1 Planing on a Free Surface |
| Summary |
Air Lubrication and Air Cavity Technology is a major development that has emerged in recent years as a means to reduce resistance and powering for many types of ships, and an efficient design for high speed marine vessels. This book introduces the mechanisms for boundary layer drag reduction and concepts studied in early research work. Air bubble and sheet lubrication for displacement vessels is outlined and the key projects introduced. Generation of low volume flow air cavities under the hull of displacement, semi displacement and planing vessels are introduced together with theoretical and empirical analysis and design methods. Resistance reduction, power reduction and fuel efficiency are covered for both displacement and high speed vessels. Air layer and air cavity effects on vessel static and dynamic stability are covered, linked to regulatory requirements such as IMO. Seaway motions and reduced impact load of high speed craft in waves are discussed including model test results. Integration of propulsion systems for optimum powering is summarized. A design proposal for a wave piercing air cavity craft is included in an appendix. A comprehensive listing of document resources and internet locations is provided for further research. Covers new developments in resistance reduction for both large displacement ships and smaller high speed vessels which have improved performance, fuel efficiency, motions and accelerations; Details design methods and applications, technology developments and fundamentals of Air Lubrication and Air Cavity systems together with propulsion system interaction allowing readers to investigate and design vessels including this technology; Introduces the primary contributions to technology developments from Russia and Ukraine as well as Norway, Japan, South Korea, The Netherlands, USA, UK, Finland and China |
| Bibliography |
Includes bibliographical references and index |
| Notes |
3.8 Reduction of Resistance by Means of Side Wedge Interceptors |
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Print version record |
| Subject |
Ships -- Lubrication
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Ships -- Aerodynamics.
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Ships -- Aerodynamics
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| Form |
Electronic book
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| Author |
Yun, Liang.
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Bliault, Alan.
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He, Shu-Long
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| ISBN |
1071604252 |
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9781071604250 |
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