Practical Ship Hydrodynamics Episode 12 pptx

... oscillating ship creates a vorticity. The problem is similar to that of an oscillating airfoil. The circulation is assumed constant within the ship. Behind the ship, vorticity is shed downstream with ship ... results in a Fredholm integral equation of the first kind. (Otherwise a Fredholm equation 212 Practical Ship Hydrodynamics  xx D  2 Ð  x Cd r 1  x d r 2   xz D  2...

Ngày tải lên: 13/08/2014, 09:20

... Data Bertram, Volker Practical ship hydrodynamics 1. Ships – Hydrodynamics I. Title 623.8 0 12 Library of Congress Cataloguing in Publication Data Bertram, Volker. Practical ship hydrodynamics / Volker ... 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 Be...

Ngày tải lên: 13/08/2014, 09:20

... 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 available overcoming current uncertainties ... methods have no practical relevance for ship flows. The interested reader may find some introduction in Peyret and Taylor (1985). 1.4.3 Applications Practical CFD applica...

Ngày tải lên: 13/08/2014, 09:20

... 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 scheme. 32 Practical Ship Hydrodynamics R R P P Grid ... Poisson 36 Practical Ship Hydrodynamics ž Unstructured grids Unstructured grids allow the largest flexibility in grid generation, but require far more effort...

Ngày tải lên: 13/08/2014, 09:20

... 66 Practical Ship Hydrodynamics ž Wave resistance The ship creates a typical wave system which contributes to the total resistance. ... pressure. Vapour pressure depends on the temperature (Fig. 2 .12) . For 15 ° it is 1700 Pa. In real water, cavitation 58 Practical Ship Hydrodynamics number of cylinders, the propeller should have ... velocity components) Ship propeller interac...

Ngày tải lên: 13/08/2014, 09:20

... for model and ship. The form factor is determined by assuming: c T c F0 D 1 C k C ˛ F 4 n c F0 86 Practical Ship Hydrodynamics ž Open-boundary condition: waves generated by the ship pass unreflected ... P i .Thecoefficients CA i to CD i are determined 72 Practical Ship Hydrodynamics S is the wetted surface in calm water, V s the ship speed. The resistance coef- ficient of the...

Ngày tải lên: 13/08/2014, 09:20

... 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 ... Ð10 3 . 6. A ship of 150 m length sails with 15 kn on water of 12 m depth. It experi- ences a dynamic sinkage amidships of 1 m and a trim (bow immerses) of 106 Practical Ship Hydrodynamics the ......

Ngày tải lên: 13/08/2014, 09:20

... large 124 Practical Ship Hydrodynamics solutions based on multipole methods. Today, usually two-dimensional panel methods are preferred due to their (slightly) higher accuracy for realistic ship geometries. ... boundary element methods and need only to discretize the boundaries of the domain, not the 122 Practical Ship Hydrodynamics The fundamental equation of motion is derive...

Ngày tải lên: 13/08/2014, 09:20

... distributions Section 4.4.6 treated ship reactions in stationary seaway. This chapter will cover probability distributions of ship reactions r during periods T with 142 Practical Ship Hydrodynamics However, ... motion of the cylinder: time average of n 33 Pu 3 Pu 3 D 1 2 n 33 ω e ju 3 j 2 144 Practical Ship Hydrodynamics For practical purposes, one tries to obtain quasi thre...

Ngày tải lên: 13/08/2014, 09:20

... 152 Practical Ship Hydrodynamics Understanding ship manoeuvring and the related numerical and experimental tools is important for the designer for the choice of manoeuvring equipment of a ship. ... contract between ship- yard and shipowner. IMO regulations specify minimum requirements for all ships, but shipowners may introduce additional or more severe requirements for certain sh...

Ngày tải lên: 13/08/2014, 09:20