Practical Ship Hydrodynamics Episode 5 doc

... 73 Table 3.1 Recommended values for C A L pp (m) c A 50 – 150 0.000 35 0.0004 150 –210 0.0002 210–260 0.0001 260–300 0 300– 350 0.0001 350 –4000 0.000 25 3.2.4 Method of Hughes–Prohaska This approach decomposes ... 0 .5 0.6 0.7 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...

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... rpm n in non- dimensional form as: K T D T  Ð n 2 Ð D 4 K Q D Q  Ð n 2 Ð D 5 34 Practical Ship Hydrodynamics 1 .5. 7 Grid generation Grid generation for CFD computations, especially RANSE computations, accounts ... employed for ship flows, because they require very small time steps for the necessary very fine spatial discretization. A popular implicit scheme is the Crank–Nicholson s...

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... 0.7nD 2 0 .5 0.4 0.3 0.2 0. 15 0.08 0.06 0. 05 0.1 0.1 0. 15 0.2 0.3 0.4 0 .5 0.6 0.8 1 .5 2.0 6′ v 1.0 Upper limit for merchant ship propellers t Figure 2.13 Burill diagram Resistance and propulsion 65 3.1.2 ... The model is kept on 52 Practical Ship Hydrodynamics 6′ 2 6′ 2 6′ 2 K T K Q h h 10 . K Q K T J Figure 2.11 Influence of cavitation on propeller characteristics 0 5...

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... workstations, in practice 146 Practical Ship Hydrodynamics 4.6 Exercises: seakeeping Solutions to the exercises will be posted on the internet (www.bh.com/com- panions/0 750 64 851 1) 1. Solve the following ... pressure measured by 150 Practical Ship Hydrodynamics A z denotes the ratio of amplitude of the radiated waves and the motion ampli- tude: A 2 z D jhj 2 ju 3 j 2 D ω 3 e ...

Ngày tải lên: 13/08/2014, 09:20

... 0.04420 Ł 0.04420 Ł 0.02208 Ł 0.01 25 0. 055 3 0. 055 3 0.0306 0.0230 0.03 156 0.03 156 0.02177 0.0 250 0.0732 0.0732 0.0409 0.0306 0.04 356 0.04 356 0.030 05 0. 050 0 0.0946 0.0946 0. 053 0 0.0419 0. 059 24 0. 059 24 0.04186 0.1000 ... 0.31 0.24 0. 25 0.23 0.23 NACA NACA IFS62 IFS61 IFS58 Plate NACA Profile 00 15 00 25 TR 25 TR 25 TR 15 t/c D 0.03 00 15 ^ 11111 1 1 t/c max 15 25...

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... integration: f 1 D  S pn 1 dS f 2 D  S pn 2 dS 236 250 Practical Ship Hydrodynamics C C B B A A z w z w Figure 7.4 Partially submerged triangle with subtriangle ABC submerged (left) or surfaced (right) for the trimmed ship by: z D ... moments are used to adjust the position of the ship. We assume small changes of the position of the ship. z is the deflection of the ship (positi...

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... 43, 46–49, 167–168 Manoeuvring, 3, 16, 151 –206 Manoeuvring simulations, 152 –169 Model test, 1–4, 54 56 , 68–80, 99–101, 1 75 177 269 256 Practical Ship Hydrodynamics and the diffraction problem ... 151 Yaw rate, 153 Yaw stability, 151 , 156 Index Actuator disk, 44 Added mass, 148– 150 , 158 Added resistance, 132 Advance number, 40 Air flow, 18 Airy wave, 101 Appendages, 80 BEM, 1...

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... methods 45 2.3.4 Lifting-surface methods 46 2.3 .5 Boundary element methods 49 2.3.6 Field methods 50 2.4 Cavitation 51 2 .5 Experimental approach 54 2 .5. 1 Cavitation tunnels 54 2 .5. 2 Open-water ... (two dimensional) 250 7 .5 Rankine panel method in the frequency domain 253 7 .5. 1 Theory 253 7 .5. 2 Numerical implementation 261 References 2 65 Index 269 Introduction...

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... methods have no practical relevance for ship flows. The interested reader may find some introduction in Peyret and Taylor (19 85) . 1.4.3 Applications Practical CFD applications for ship flows concentrate ... debate over turbulence modelling for engineering applications, but for ship flows we will have to wait at least 20 Practical Ship Hydrodynamics full-scale will become availab...

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... 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 approach of ITTC 57 is used ... 10 6 m 2 /s. The experiments yield for the model: V m (m/s) 0 .5 0.6 0. 75 0. 85 1.0 1.1 1.2 R T,m (N) 0.402 0 .56 4 0.867 1.114 1 .58 4 2. 054 2. 751 (a) Determine the form factor f...

Ngày tải lên: 13/08/2014, 09:20