| Description |
1 online resource |
| Contents |
Machine generated contents note: ch. 1 Interaction of the Free Stream with an Elastic Surface -- 1.1. Introductory Remarks -- 1.2. Basic Types of Coherent Vortical Structures arising in the Flow about a Body, and Methods of their Control -- 1.2.1. CVS Types -- 1.2.2. Methods of CVS Control -- 1.3. Coherent Structures in a Turbulent Boundary Layer -- 1.4. The Flow over Elastic Surfaces -- 1.5. Experimental Studies on the Characteristics of Elastic Plates -- 1.6. Experimental Investigations of Coherent Vortical Structures in a Transitional Boundary Layer on the Flow over a Rigid Plate -- 1.7. Distribution of Disturbing Movement across the Thickness of a Laminar Boundary Layer over a Rigid Surface -- 1.8. Physical Process of Laminar-Turbulent Transition of a Boundary Layer over a Rigid Plate -- 1.9. Hydrobionic Principles of Drag Reduction -- 1.10. Experimental Investigation of Coherent Vortical Structures in a Transitional Boundary Layer over an Elastic Plate |
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1.11. Distribution of Disturbing Movement on the Thickness of a Laminar Boundary Layer on an Elastic Surface -- 1.12. Receptivity of the Boundary Layer to Different Disturbances -- 1.13. The Boundary Layer as a Heterogeneous, Asymmetric Wave-Guide -- 1.14. Control Methods of the CVSs of a Boundary Layer -- 1.14.1. Experimental Investigation of a Flow of the Localized Hollows -- 1.14.2. Concentrated and Distributed Methods of Formation of Longitudinal Vortical Systems in a Boundary Layer -- 1.14.3.Combined Method of Drag Reduction -- 1.15. Physical Substantiation of the Interaction Mechanism of the Flow with an Elastic Surface -- ch. 2 Types of Elastic Surfaces and Research of their Mechanical Characteristics -- 2.1. Models of Elastic Surfaces -- 2.2. Mechanical Characteristics of Elastomers -- 2.3. Methods of Measuring the Mechanical Characteristics of Elastomers -- 2.4. The Apparatus and Devices for Measuring the Mechanical Characteristics of Elastomers |
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2.4.1. Apparatus for Measuring the Static Characteristics -- 2.4.2. Equipment for Measurement Elastomers being Stretched -- 2.4.3. Apparatus for Compression Testing -- 2.4.4. Apparatus for Measuring the Dynamic Parameters -- 2.5. Construction of Elastic Surfaces -- 2.6. Main Similarity Parameters -- 2.7. Measurement of Static Mechanical Characteristics of Elastomers -- 2.8. Measurement of Dynamic Characteristics of Elastomers -- 2.8.1. Determination of Elasticity by the Ball Recoil Method -- 2.8.2. Determination of Elastomer Characteristics by the Method of Forced Non-Resonant Oscillation -- 2.8.3. Determination of Elastomer Parameters by the Method of Wave and Pulse Propagation -- 2.8.4. Definition of the Complex of Mechanical Characteristics of Elastomers -- 2.9. Oscillations and Waves in Composite Elastomers -- ch. 3 The Turbulent Boundary Layer over Elastic Plates -- 3.1. Experimental Equipment and Methods of Measurement -- 3.2. Velocity Profiles of Average Speed over Elastic Plates |
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3.3. Profiles of Fluctuation Velocities -- 3.4. Velocity Field in the Near-Wall Region -- 3.5. Energy Balance of a Turbulent Boundary Layer over an Elastic Plate -- 3.6. Correlation and Spectral Parameters of a Turbulent Boundary Layer over an Elastic Plate -- ch. 4 Fluctuations of an Elastic Surface in a Turbulent Boundary Layer -- 4.1. Apparatus for Research on Fluctuations of an Elastic Surface -- 4.2. Investigation of Fluctuations of an Elastic Surface -- 4.3. Structure of a Turbulent Boundary Layer over Elastic Plates in Water -- 4.4. Interaction of Different Disturbances in a Boundary Layer over Elastic Plates -- 4.5. Boundary Layer over a Controlled Elastic Plate -- 4.6. Investigation of Velocity Fluctuations on Dolphin Skin -- ch. 5 Experimental Investigation of Friction Drag -- 5.1. Methods of Determining Friction Drag on Plates -- 5.2. The Complex Apparatus for Experimental Research -- 5.3. Experimental Investigations of Friction Drag on Elastic Plates |
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5.4. Drag of Cylinders in the Longitudinal Flow -- 5.5. Friction Drag of Elastic Cylinders in the Longitudinal Flow -- 5.6. Influence of Polymer Additives on the Friction Drag of an Elastic Plate -- 5.7. Engineering Method for the Selection of Elastic Plates -- ch. 6 Hydrobionics and the Anatomy of Fast Swimming Hydrobionts -- 6.1. Interaction of High-Speed Hydrobionts and Flow -- 6.1.1. Structural Peculiarities of Swordfish Skin Coverings -- 6.1.2. Hydrodynamic Peculiarities of the Skin Structure and Body of the Swordfish -- 6.2. Experimental Research of Bodies with Xiphoid Tips -- 6.3. Theoretical Research on Bodies with Xiphoid Tips -- 6.4.Combined Method of Drag Reduction of a Body with a Xiphoid Tip and Injection of Polymer Solutions -- 6.4.1. Experimental Equipment and Technique of Measurements -- 6.4.2. Drag of the Model with No Injection of a Polymer Solution -- 6.4.3. Drag of the Model with the Ogive Tip and at an Injection of Polymer Solutions |
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6.4.4. Drag of the Model with Xiphoid Tips and Injection of Polymer Solutions -- 6.4.5. Friction Drag for the Injection of Polymer Solutions into a Boundary Layer -- 6.5. Physical Mechanism of the Influence of Xiphoid Tip on Drag Reduction -- 6.6. Kinematic Characteristics of the Model Flow at the Injection of Polymer Solution through a Ring Slot -- 6.7. Method and Apparatus for the Optimum Injection of Liquids in a Boundary Layer -- 6.7.1. Method for Reducing the Dissipation Rate of Fluid Injected into a Boundary Layer -- 6.7.2. Method and Apparatus for Increasing the Effectiveness and Efficiency of Multiple Boundary Layer Control Techniques -- 6.7.3. The Underwater Apparatus with Fin Propulsive Device -- 6.7.4. The Underwater Apparatus -- 6.8. Modeling of Disturbance Development in the Flow Behind a Ledge -- 6.9. Basic Conclusions -- 6.9.1. Flow of Elastic Surfaces -- 6.9.2. Injection of Polymer Solutions at a Flow of Elastic Surfaces Generating Longitudinal Vortical Structures |
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6.9.3. Influence of Nasal Parts of a Body on the Efficiency of Polymer Solution Injection into a Boundary Layer -- 6.9.4. Influence of a Static Electrical Field on the Characteristics of a Boundary Layer -- 6.9.5. Injection of Polymer Solutions from Two Slots -- 6.9.6. Injection of Polymer Solutions from One Nasal Slot for a Flow of the Cylinder with an Elastic Surface -- 6.9.7. Various Methods of Injection into a Boundary Layer of Gas Microbubbles -- 6.9.8. Injection of Polymer Solutions Through Three Slots -- ch. 7 Mathematical Modeling of the Turbulent Boundary Layer with Injection of Polymer Additives -- 7.1. Introduction -- 7.2. Statement of Problem -- 7.3. Brief Analysis of Known Results for Turbulent Flows in the Presence of Solutions of High-Molecular-Weight Polymers -- 7.3.1. Physical Aspects of Influence of the Polymeric Components on the Structure of a Boundary Layer Flow -- 7.3.2. Influence of the Components of a Polymer on the Profile Longitudinal Component Velocity |
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7.4. Governing Equations -- 7.5. Calculation Method -- 7.6. Turbulence Model -- 7.7. Calculations Results and Discussion -- 7.8. Conclusions -- 7.9. Probable Directions for Further Developments |
| Summary |
While other methods of drag reduction are well-known in marine R & D and ship design environments worldwide, compliant coating drag reduction remains less well-known and poorly understood. This important book presents cutting-edge techniques and findings from research sources not generally accessible by Western researchers and engineers, aiding the application and further development of this potentially important technology. Beginning with an introduction to drag reduction that places the authors' work on elastic surfaces and combined techniques in context, the book moves on to provide a comprehensive study of drag reduction through elastic coating with both flow and material properties considered. Coverage includes: Experimental findings around coherent vortical structures (CVS) in turbulent boundary layers and methods of controlling them Static and dynamic mechanical characteristics of elastic composite coatings, as well as new techniques and devices developed for their measurement Combined methods of flow control and drag reduction, including the effect of injection of polymer solutions, elastic coatings and generated longitudinal vortical structures on hydrodynamic resistance Intended as a reference for senior engineers and researchers concerned with the drag reduction and the dynamics of turbulent boundary layer flows, Boundary Layer Flow over Elastic Surfaces provides a unique source of information on compliant surface drag reduction and the experimental techniques around it that have shown measurable and repeatable improvements over recent years. This compilation of research findings and new techniques developed for measurement will aid R & D engineers, naval architects and senior designers in their quest to achieve drag reductions that will deliver significant efficiency savings. Unique source of information on compliant surface drag reduction-an important area of technology with practical application to ships-from otherwise inaccessible research studiesUpdates the knowledge-base on boundary layer flow and surface friction reduction, critical topics in the global quest for increased ship efficiency and fuel economyReveals new techniques and devices developed for measurement and provides a comprehensive study of drag reduction through elastic coating with both flow and material properties covered |
| Bibliography |
Includes bibliographical references and index |
| Notes |
Title from publisher data |
| Subject |
Ships -- Aerodynamics.
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Frictional resistance (Hydrodynamics)
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Boundary layer control.
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Boundary layer control
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Frictional resistance (Hydrodynamics)
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Ships -- Aerodynamics
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| Form |
Electronic book
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| Author |
Chun, Ho-Hwan
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Lee, Inwon
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