Download or read book Analysis and Experiments for Contra rotating Propeller written by Eyal Kravitz and published by . This book was released on 2011 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contra-rotating propellers have renewed interest from the naval architecture community, because of the recent development of electric propulsion drives and podded propulsors. Contrarotating propulsion systems have the hydrodynamic advantages of recovering part of the slipstream rotational energy which would otherwise be lost utilizing a conventional screw propeller system. The application of this type of propulsion becomes even more attractive with the increasing emphasis on fuel economy and the improvement of the propulsive efficiency. OPENPROP is an open source propeller design and analysis code that has been in development at MIT since 2007. This thesis adds another feature to the project with the off design analysis of a contra-rotating propeller set. Based on this code, the thesis offers a comparative analysis of two types of propulsors: a single propeller and a contra-rotating propeller set, which were designed for the DDG-51 destroyer class vessel. This thesis also presents the method for using these off-design analysis results to estimate ship powering requirements and fuel usage. The results show the superiority of the contra-rotating propeller over the traditional single propeller, with increased propeller efficiency of about 9% at the design point and up to 20% at some of the off design states. The annual fuel consumption savings for the DDG-51 equipped with a CRP was a total of 8.8% fuel savings.

Download or read book Contra rotating Propellers written by H. Lindgren and published by . This book was released on 1967 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The analysis of counter rotating propeller systems written by Society of Automotive Engineers, Inc and published by . This book was released on 1985 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Analysis of Counter rotating Propeller Performance written by J. L. Colehour and published by . This book was released on 1985 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Efficient Hybrid Scheme for the Analysis of Counter Rotating Propellers written by R. Srivastava and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Theoretical Analysis of a Constant Speed Counter rotating Propeller written by Otto John Veiga Dunhofer and published by . This book was released on 1942 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Numerical Method for the Design and Analysis of Counter rotating Propellers written by Scott Charles Playle and published by . This book was released on 1984 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Vibratory Behaviour of a Rotating Propeller Shaft Part II written by L.J. Wevers and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Analysis of the Propulsion Experiments Performed on a Model Representing the Stretched PONCE DE LEON SPDL Class RO RO Ship Fitted with Two Sets of Design Contrarotating Propellers Model 5362 Propellers 4731 4732 and 9019 9020 written by Steven C. Fisher and published by . This book was released on 1981 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of propulsion experiments were performed on Model 5362, representing a Stretched PONCE DE LEON Class RO/RO ship. The model was fitted with two sets of design contrarotating propellers. The results of the propulsion experiments indicate that the ship when equipped with either set of contrarotating propellers should achieve design speed with 12-13% less power than when fitted with the design single screw propeller. The methods used in analyzing the data are discussed. (Author).

Download or read book Free space Oscillating Pressures Near the Tips of Rotating Propellers written by Harvey H. Hubbard and published by . This book was released on 1949 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: An analysis is presented whereby the free-space oscillating pressures associated with a rotating propeller may be determined at any point in space. This analysis is based on the fundamental Gutin equations without some of the simplifying assumptions. Static tests for several different propellers were conducted in the tip Mach number rang 0.45 to 1.00. Charts are given for estimating free-space pressures for a given propeller. The response of the fuselage to these oscillating pressures is also treated and some factors to be considered in solving the problems of fuselage vibration and noise are indicated.

Download or read book Model Tests on Contra rotating Propellers written by Jan Dirk van Manen and published by . This book was released on 1969 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Method for the Design of Contra rotating Propellers written by Knut J. Minsaas and published by . This book was released on 1971 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Marine Propellers and Propulsion written by John Carlton and published by Butterworth-Heinemann. This book was released on 2012-10-30 with total page 539 pages. Available in PDF, EPUB and Kindle. Book excerpt: The early development of the screw propeller. Propeller geometry. The propeller environment. The ship wake field, propeller performance characteristics.

Download or read book Design of Contra rotating Propellers by Circulation Theory and Model Tests written by William M. Devlin and published by . This book was released on 1962 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Tests of Model Contra rotating Propellers with a minimum Body written by R. C. Pankhurst and published by . This book was released on 1946 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Final Report on Study of Contra rotating Propeller Arrangements for Merchant Ships written by Gunnar A. Larsen and published by . This book was released on 1970 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Marine Research written by and published by . This book was released on 1969 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt: