BASIC SHIP PROPULSION GHOSE PDF

The propulsion machinery inside the ship is however considered only very briefly. The first chapter describes the development of ships and ship machinery and then introduces various ship propulsion devices. Subsequent chapters deal with conventional screw propellers that are used in most ships today. Among the subjects covered are screw propeller geometry, the theory of propellers, propeller characteristics, hull-propeller interaction, propeller cavitation, strength of propellers and model experiments involving propellers. The design of propellers for ships as well as for tugs and trawlers is given in a separate chapter, which also discusses the application of propeller theory to design. Ship trials and service performance analysis are then described.

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The propulsion machinery inside the ship is however considered only very briefly. The first chapter describes the development of ships and ship machinery and then introduces various ship propulsion devices. Subsequent chapters deal with conventional screw propellers that are used in most ships today. Among the subjects covered are screw propeller geometry, the theory of propellers, propeller characteristics, hull-propeller interaction, propeller cavitation, strength of propellers and model experiments involving propellers.

The design of propellers for ships as well as for tugs and trawlers is given in a separate chapter, which also discusses the application of propeller theory to design. Ship trials and service performance analysis are then described. Some miscellaneous topics including propeller unsteady forces, propeller induced vibration and noise, propulsion in a seaway, engine-propeller matching, and propeller manufacture and repair are discussed next.

The last chapter of the book describes unconventional ship propulsion devices such as controllable pitch propellers, ducted propellers, contra-rotating propellers, azimuthing and podded propellers, cycloidal propellers and waterjet propulsion as well as energy saving and flow improvement devices such as various types of ducts and fins.

There is a glossary of technical terms for those unfamiliar with ships. An important feature of the book is the large number of numerical examples to illustrate various points, over one hundred and fifty problems with answers and a set of review questions to facilitate self-study. The book also has nearly one hundred figures, appendices containing useful data and references for those who wish to pursue certain topics to a more advanced level.

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BASIC SHIP PROPULSION GHOSH PDF

Yozshurg Towing duty propellers are designed using methodical series data. There are also vessels that provide auxiliary services such as tugs and propylsion. A method to determine the Reynolds number correction for propeller open water characteristics is given in Chapter 8. When considering the performance characteristics of a propeller in open water, some simplifications are usually made in Prooulsion. The angle Os between a straight line joining the centre of the propeller tq.

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Amazon Rapids Fun stories for kids on the go. Two other ship propulsion devices may be IIl;entioned here. Gawn Propeller Series Geometry. Acknowledgements l, I t rI The authors acknowledge their debt to the students of the Department of Naval Architecture and Ocean Engineering, Indian Institute of Technology, Kharagpur, who provided the motivation for writing this book. Cavitation is discussed in Chapter 6.

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Low speed diesel engines can be directly connected to ship propellers and can be reversed to allow the ship to move astern. Another type of engine used for ship propulsion is the gas turbine. Like the steam turbine, the gas turbine runs at a very high speed and cannot be reversed. Gas turbines are mostly used in high speed ships where their low weight and volume for a given power give them a great advantage over"other types of engines.

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Arashigami In order to further reduce the Reynolds number correction, the model propeller in open water is run at as high an axial propulsionn and revolution rate as possible for the required range of advance coefficient, so that the difference shjp the Reynolds numbers of the model propeller and the ship propeller is minimised. Delivery and Returns see our delivery rates and policies thinking of returning an item? These sections are called radial sections or cylindrical sections. Subsequent chapters deal with conventional screw propellers that are used in most ships today. The result is that increased power is required to aUain a given speed, and yhose cases of severe cavitation the ship may not achieve the specified speed.

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