Propulsion Tests In Level Ice On A Model Of A 140 Ft Wtgb Icebreaker

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Propulsion Tests in Level Ice on a Model of a 140-ft WTGB Icebreaker

Author : Jean-Claude Tatinclaux
Publisher :
ISBN 13 :
Total Pages : 13 pages
Book Rating : 4.:/5 (121 download)

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Book Synopsis Propulsion Tests in Level Ice on a Model of a 140-ft WTGB Icebreaker by : Jean-Claude Tatinclaux

Download or read book Propulsion Tests in Level Ice on a Model of a 140-ft WTGB Icebreaker written by Jean-Claude Tatinclaux and published by . This book was released on 1985 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of propulsion tests in level ice on a model of the WTGB 140-ft. Great Lakes icebreaker are presented and compared to available full-scale data. In spite of the difficulties in exactly modeling full-scale conditions, the predictions based on the model test results of the ship performance compared reasonably well to those measured during full-scale trials. Several possible sources of errors are identified. In particular, duplication at the model scale of the ship hull's ice friction coefficient is considered to be critical in determining the ice resistance and the corresponding propulsion characteristics, namely propeller speed, thrust and torque. Keywords: Coast Guard ships; Ship models; Icebreakers; and Model tests.

Propulsion Tests in Level Ice on a Model of a 140-ft WTGB Icebreaker

Author : Jean-Claude Tatinclaux
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis Propulsion Tests in Level Ice on a Model of a 140-ft WTGB Icebreaker by : Jean-Claude Tatinclaux

Model Tests on Two Models of WTGB 140-foot Icebreaker

Author :
Publisher :
ISBN 13 :
Total Pages : 17 pages
Book Rating : 4.:/5 (17 download)

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Book Synopsis Model Tests on Two Models of WTGB 140-foot Icebreaker by :

Download or read book Model Tests on Two Models of WTGB 140-foot Icebreaker written by and published by . This book was released on 1984 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of resistance tests in level ice and broken ice channels are presented for two models of the WTGB 140-ft icebreaker at scales of 1:10 and 1:24, respectively. No scale effect on the resistance in level ice could be detected between the two models. From the test results an empirical predictor equation for the full scale ice resistance is derived. Predicted resistance is compared against, and found to be 25 to 40% larger than, available full-scale values estimated from thrust measurements during full-scale trials of the Great Lakes icebreaker Katmai Bay.

Technical Report

Author : Cold Regions Research and Engineering Laboratory (U.S.)
Publisher :
ISBN 13 :
Total Pages : 328 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Technical Report by : Cold Regions Research and Engineering Laboratory (U.S.)

Download or read book Technical Report written by Cold Regions Research and Engineering Laboratory (U.S.) and published by . This book was released on 1950 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Model Tests on Two Models of WTGB 140-foot Icebreaker

Author : Jean-Claude Tatinclaux
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis Model Tests on Two Models of WTGB 140-foot Icebreaker by : Jean-Claude Tatinclaux

Download or read book Model Tests on Two Models of WTGB 140-foot Icebreaker written by Jean-Claude Tatinclaux and published by . This book was released on 1984 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

CRREL Report

Author :
Publisher :
ISBN 13 :
Total Pages : 588 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis CRREL Report by :

Download or read book CRREL Report written by and published by . This book was released on 1988 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Ship Model Testing in Level Ice

Author : Jean-Claude Tatinclaux
Publisher :
ISBN 13 :
Total Pages : 44 pages
Book Rating : 4.:/5 (359 download)

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Book Synopsis Ship Model Testing in Level Ice by : Jean-Claude Tatinclaux

Download or read book Ship Model Testing in Level Ice written by Jean-Claude Tatinclaux and published by . This book was released on 1988 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Analysis of the Performance of a 140-foot Great Lakes Icebreaker

Author : George P. Vance
Publisher :
ISBN 13 :
Total Pages : 44 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis Analysis of the Performance of a 140-foot Great Lakes Icebreaker by : George P. Vance

Download or read book Analysis of the Performance of a 140-foot Great Lakes Icebreaker written by George P. Vance and published by . This book was released on 1980 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Level Ice Breaking by a Simple Wedge

Author : Jean-Claude Tatinclaux
Publisher :
ISBN 13 :
Total Pages : 64 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Level Ice Breaking by a Simple Wedge by : Jean-Claude Tatinclaux

Download or read book Level Ice Breaking by a Simple Wedge written by Jean-Claude Tatinclaux and published by . This book was released on 1985 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tests in level ice on an idealized icebreaker bow in the shape of a simple wedge were conducted in the test basin. The horizontal and vertical forces on the wedge were measured, and floe size distribution in the wake of the wedge was observed. From the force measurements, the ice wedge/hull friction factor was calculated and found to be in general agreement with the friction factor measured in separate friction tests. The ice floe length and ice floe area measured in the current study were found to follow log-normal probability distributions defined by the length average L and area average A and corresponding standard deviations S sub L and S sub A. The results of these tests and other tests conducted at another facility showed that the ratios A/h squared and L/h (A = average floe area, L = average floe length, h = ice thickness) were, for the same type of model ice, directly proportional to the parameter sigma/gamma h (sigma = ice bending strength, gamma = specific weight of water) and sigma/gamma h, respectively, and independent of the velocity and ice strain modulus or ice characteristic length. However, the coefficients of proportionality appear to depend upon the type of model ice used in the tests. The ratios S-sub-L/A were independent of sigma/gamma h but varied with the bow shape and the type of ice. The available field data are not sufficient for meaningful comparison with the laboratory results. (Author).

Ice Resistance Tests on Two Models of the WTGB Icebreaker

Author : J. C. Tatinclaux
Publisher :
ISBN 13 :
Total Pages : 12 pages
Book Rating : 4.:/5 (228 download)

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Book Synopsis Ice Resistance Tests on Two Models of the WTGB Icebreaker by : J. C. Tatinclaux

Download or read book Ice Resistance Tests on Two Models of the WTGB Icebreaker written by J. C. Tatinclaux and published by . This book was released on 1983 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the particular full-scale conditions modelled in the tests, the dimensionless level ice resistance obtained with the two models of the 140-foot WTGB was essentially independent of the model scale. The fact that no scale effects were identified in the present tests can be interpreted in two ways: one is that icebreakers of size and operating conditions in ice similar to those of the WTGB can be confidently model tested at a scale of at least 1:24. The second interpretation is that model tests of icebreakers may be conducted in model ice 2 cm thick or thicker and/or with a bending strength of 30 kPa or more, since these values were the test conditions for the smaller WTGB model; these tests conditions would then specify a limiting model scale so that they correspond to the desired operating conditions of an icebreaker under design. By conducting model tests not only in level ice but also through broken ice channels, it was possible to separate the level ice resistance into two main components. According to this analysis, it was shown that the ice-breaking component is primarily a function of the Cauchy number but also the Froude number, especially at speed low enough for the ship to experience significant pitching and heaving motions when riding on the level ice and falling back as the ice sheet fails.

Monthly Catalog of United States Government Publications

Author :
Publisher :
ISBN 13 :
Total Pages : 1110 pages
Book Rating : 4.:/5 (891 download)

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Book Synopsis Monthly Catalog of United States Government Publications by :

Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on with total page 1110 pages. Available in PDF, EPUB and Kindle. Book excerpt:

CRREL Benchnotes

Author :
Publisher :
ISBN 13 :
Total Pages : 8 pages
Book Rating : 4.3/5 (121 download)

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Download or read book CRREL Benchnotes written by and published by . This book was released on 1985 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Model Tests in Ice of a Canadian Coast Guard R-class Icebreaker-high Friction Model

Author : Jean-Claude Tatinclaux
Publisher :
ISBN 13 :
Total Pages : 52 pages
Book Rating : 4.3/5 (121 download)

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Book Synopsis Model Tests in Ice of a Canadian Coast Guard R-class Icebreaker-high Friction Model by : Jean-Claude Tatinclaux

Download or read book Model Tests in Ice of a Canadian Coast Guard R-class Icebreaker-high Friction Model written by Jean-Claude Tatinclaux and published by . This book was released on 1989 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Marine Propellers and Propulsion

Author : John Carlton
Publisher : Butterworth-Heinemann
ISBN 13 : 0081003749
Total Pages : 612 pages
Book Rating : 4.0/5 (81 download)

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Book Synopsis Marine Propellers and Propulsion by : John Carlton

Download or read book Marine Propellers and Propulsion written by John Carlton and published by Butterworth-Heinemann. This book was released on 2018-11-30 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt: Marine Propellers and Propulsion, Fourth Edition, offers comprehensive, cutting edge coverage to equip marine engineers, naval architects or anyone involved in propulsion and hydrodynamics with essential job knowledge. Propulsion technology is a complex, multidisciplinary topic with design, construction, operational and research implications. Drawing on experience from a long and varied career in consulting, research, design and technical investigation, John Carlton examines hydrodynamic theory, materials and mechanical considerations, and design, operation and performance. Connecting essential theory to practical problems in design, analysis and operational efficiency, the book is an invaluable resource, packed with hard-won insights, detailed specifications and data. - Features comprehensive coverage of marine propellers, fully updated and revised, with new chapters on propulsion in ice and high speed propellers - Includes enhanced content on full-scale trials, propeller materials, propeller blade vibration, operational problems and much more - Synthesizes otherwise disparate material on the theory and practice of propulsion technology from the past 40 years' development, including the latest developments in improving efficiency - Written by a leading expert on propeller technology, essential for students, marine engineers and naval architects involved in propulsion and hydrodynamics

Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering

Author :
Publisher :
ISBN 13 :
Total Pages : 492 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering by :

Download or read book Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering written by and published by . This book was released on 1989 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Icetech '90

Author : Society of Naval Architects and Marine Engineers (U. S.)
Publisher :
ISBN 13 :
Total Pages : 330 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Icetech '90 by : Society of Naval Architects and Marine Engineers (U. S.)

Download or read book Icetech '90 written by Society of Naval Architects and Marine Engineers (U. S.) and published by . This book was released on 1990 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Analysis of the Performance of a 140-foot Great Lakes Icebreaker

Author : George P. Vance
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.:/5 (227 download)

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Book Synopsis Analysis of the Performance of a 140-foot Great Lakes Icebreaker by : George P. Vance

Download or read book Analysis of the Performance of a 140-foot Great Lakes Icebreaker written by George P. Vance and published by . This book was released on 1980 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents the results of the tests on the new U.S. Coast Guard 140-ft icebreaker Katmai Bay (WTGB-101) in the level plate ice and brash ice in Whitefish Bay and the St. Marys River. The results indicate that the vessel can penetrate 22 in. of level freshwater ice with 2-3 in. of snow cover. It can also penetrate up to 48 in. of brash ice in a continuous mode and at least 30 in. of plate ice by backing and ramming. The installed bubbler system decreased the required power of the vessel from 10 to 30% in brash ice and 25 to 35% in level ice. The low friction coating appears to be effective in decreasing the friction factor when it remains intact; when it peels off it appears to make conditions worse than plain paint. An average dynamic friction factor of 0.15 could be used over the entire hull for these tests. (Author).