Practical Ship Hydrodynamics Episode 9 ppt

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Ngày tải lên: 13/08/2014, 09:20

... containerships and ro-ro ships model tests are often performed as part of the regular design process, as IMO regulations require Practical Ship Hydrodynamics Volker Bertram 6 Practical Ship Hydrodynamics This ... Data Bertram, Volker Practical ship hydrodynamics 1. Ships – Hydrodynamics I. Title 623.8 0 12 Library of Congress Cataloguing in Publication Data Bertram, Volker...

Ngày tải lên: 13/08/2014, 09:20

... Bertram ( 199 8b), and Bertram and Thiart ( 199 8). The oscillating ship creates a vorticity. The problem is similar to that of an oscillating airfoil. The circulation is assumed constant within the ship. ... d 2 226 Practical Ship Hydrodynamics The derivation used  t 2 C a 2  3/2 dt D t/a 2 p t 2 C a 2 .Forx 2 C y 2 − jz 1 jjz 2 j or y 2 C z 2 1 − x 2 special formulae a...

Ngày tải lên: 13/08/2014, 09:20

... model for ship flow applications in practice in the 199 0s was the standard k-ε model, although its results were not convincing in benchmark tests for several ship geometries. By the late 199 0s, k-ω ... methods have no practical relevance for ship flows. The interested reader may find some introduction in Peyret and Taylor ( 198 5). 1.4.3 Applications Practical CFD applications for s...

Ngày tải lên: 13/08/2014, 09:20

... lifting-surface and panel methods, can be found in, e.g., Breslin and Andersen ( 199 3), Kinnas ( 199 6), and Streckwall ( 199 3, 199 9). Propellers 47 power. The earliest lifting-surface attempts were based ... alternative propulsive systems for fast ships, or ships operating in extremely shallow water are discussed by, e.g., Allison ( 199 3), Kruppa ( 199 4), and Terswiga ( 199 6). The Roya...

Ngày tải lên: 13/08/2014, 09:20

... singularities on the image panels. An image for the source that 64 Practical Ship Hydrodynamics Schneekluth and Bertram ( 199 8) give several empirical formulae to estimate w in simple design approaches. ... 66 Practical Ship Hydrodynamics ž Wave resistance The ship creates a typical wave system which contributes to the total resistance. ... velocity components) Ship propeller...

Ngày tải lên: 13/08/2014, 09:20

... 0.8 V 2 /( g . H ) 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 .9 √ A m / H 10% 9 8 7 6 5 4 3 2 1% 0.1% Figure 3.10 Percentage loss of speed in shallow water (Lackenby ( 196 3)) 74 Practical Ship Hydrodynamics 0 0.2 0.4 0.6 0.8 ... prediction. Schneekluth and Bertram ( 199 8) compile some data from shipbuilding experience: properly arranged bilge keels contribute only 1–2% to the total resista...

Ngày tải lên: 13/08/2014, 09:20

... fieldsuchasFlowtech (Larsson ( 199 7, 199 8)), or HSVA (Bertram and Jensen ( 199 4)), Bertram ( 199 8a). The state of the art in research is documented in validation workshops like the Tokyo 199 4 workshop and the ... 96 Practical Ship Hydrodynamics What is the resistance of a ship with L pp D 150 m if the ship is geometri- cally and dynamically similar to the base ship and the ap...

Ngày tải lên: 13/08/2014, 09:20

... 106 126 132 151 154 162 327 314 268 187 86 27 5 FCUM 9. 8 30.3 51 .9 68.7 80.2 87 .9 92 .9 95.7 97 .4 98 .5 99 .5 99 .8 99 .9 100.0 100.0 100.0 100.0 Ship seakeeping 111 0.015 0.010 0.005 012345 a U c / c p Figure ... 78 0 0 0 0 14.6 16.4 99 .1 2 69 412 7 19 942 1 0 69 1 2 59 1 312 1 374 1 358 1 325 2 246 1 303 378 44 0 0 0 16.4 18.6 99 .8 110 124 290 314 424 451 516 534 5 5...

Ngày tải lên: 13/08/2014, 09:20

... Bertram ( 199 8) for practical recommendations translated from the Kansai Society of Naval Architects, Japan. ž Mizoguchi and Tanizawa ( 199 6) for stochastical slamming theories. ž Korobkin ( 199 6) for ... response to impact. In the late 196 0s and 197 0s, slamming and whipping resulted in some spectac- ular ship wrecks, e.g. bulkers and container ships breaking amidships. The disasters...

Ngày tải lên: 13/08/2014, 09:20