Download or read book Development and Model Tests of a Surface Ship Additive System written by A. Gollan and published by . This book was released on 1970 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Froude scaled ship model 11.4 feet long and 1.4 feet girth was tested for drag while dilute polymer (FRA) water solutions were ejected around the hull. A ram scoop-slot ejective arrangement in conjunction with a polymer mixing and feed system was developed and utilized successfully to affect the model's drag. Four series of tests were conducted at various operating conditions including three ejection slot gap settings and two ejective slot locations. An actual drag reduction of about 12 percent of the total drag at top speed (20 ft/sec), was obtained. Drag reduction of over 18 percent of the total drag or more than 55 percent in the frictional drag is conceivable at proper ejection conditions with two ejection stations. This may be obtained when the ejected flow amounts only to about ten times the sublayer flow rate and contains a polymer concentration between 1000 and 1300 ppm. Additional studies are recommended to enable the optimization of the polymer ejective system and assess its full potential. (Author).
Download or read book Chemical Additives for Improvement of Oil Spill Control August 1974 written by United States. Coast Guard and published by . This book was released on 1974 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Government Research Development Reports written by and published by . This book was released on 1970 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rheology of Drag Reducing Fluids written by Aroon Shenoy and published by Springer Nature. This book was released on 2020-03-25 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explains theoretical derivations and presents expressions for fluid and convective turbulent flow of mildly elastic fluids in various internal and external flow situations involving different types of geometries, such as the smooth/rough circular pipes, annular ducts, curved tubes, vertical flat plates, and channels. Understanding the methodology of the analyses facilitates appreciation for the rationale used for deriving expressions of parameters relevant to the turbulent flow of mildly elastic fluids. This knowledge serves as a driving force for developing new ideas, investigating new situations, and extending theoretical analyses to other unexplored areas of the rheology of mildly elastic drag reducing fluids.The book suits a range of functions--it can be used to teach elective upper-level undergraduate or graduate courses for chemical engineers, material scientists, mechanical engineers, and polymer scientists; guide researchers unexposed to this alluring and interesting area of drag reduction; and serve as a reference to all who want to explore and expand the areas dealt with in this book.
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1972 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of Ship Research written by and published by . This book was released on 1976 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NBS Special Publication written by and published by . This book was released on 1978 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements written by and published by . This book was released on 1971 with total page 1484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of Basic Engineering written by and published by . This book was released on 1972 with total page 982 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1975-10 with total page 1322 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Air Lubricated and Air Cavity Ships written by Gennadiy Alexeevitch Pavlov and published by Springer Nature. This book was released on 2020-03-28 with total page 495 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 828 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book MRIS Abstracts written by Maritime Research Information Service and published by . This book was released on 1975 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Previews of Heat and Mass Transfer written by and published by . This book was released on 1976-10 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Government Research Reports written by and published by . This book was released on 1964 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydraulic Research in the United States 1968 written by United States. National Bureau of Standards and published by . This book was released on 1969 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report written by United States. National Bureau of Standards and published by . This book was released on 1968 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
