Author: Takeshi FuwaPublisher:
ISBN:
Category :
Languages : en
Pages : 33
Book Description
Measurements of wake flow and hydrodynamic force distribution on a numerical ship hull form with drift angle
Author: Takeshi FuwaMarine Simulation and Ship Manoeuvrability
Author: M.S. ChislettPublisher: Routledge
ISBN: 135143361X
Category : Technology & Engineering
Languages : en
Pages : 660
Book Description
Real-time, interactive ship simulators limped onto the scene, in the wake of flight simulators, some years ago. The maritime industries have a long history of conservatism, but this is now changing rapidly. The information age has also swept over ships and shipping, and has been taken to heart to such an extent that, for example, flight simulators now cooperate with ship simulators and import useful new concepts and methodologies. The more than 50 papers contained in this book show what and why. Although traditionally conservative, the marine world is also traditionally international and this has not changed. The papers in the book are by leading authors from all over the world and provide a detailed snap-shot of the rapidly advancing state-of-the-art, together with pointers to the future. The overall theme of MARSIM '96 and therefore also of this book is: Vessel manouevrability and marine simulation research, training and assessment, and includes original papers on topics such as bridge resource management, distant learning and simulators coupled via The Internet, virtual reality, neural networks, rudder-propeller hydrodynamics, prime mover models, squat in shallow water, and many more.
Practical Ship Hydrodynamics
Author: Volker BertramPublisher: Butterworth-Heinemann
ISBN: 0750648511
Category : Nature
Languages : en
Pages : 281
Book Description
Introduction; Overview of problems and approaches; Model test and similarity laws; Full scale tests; Numerical approaches (Computational Fluid Dynamics); Basic equations, Basic techniques; Applications. Propeller Flows: Propeller geometry and other basics, Propeller curves; Numerical methods for propeller design; Lifting line theory; Lifting surface theory; BEM for propellers; Field methods; Cavitation; Experimental approach; Propeller design procedure. Resistance and propulsion: Resistance and propulsion concepts; Interaction between ship and propeller; Decomposition of resistance; Experimental approach; Towing tanks and experimental set up; Resistance test; Method ITTC 1957; Method of Hughes-Prohaska; Propulsion test; Additional resistance under service conditions; Simple design approaches; CFD approaches for steady flow; Wave resistance computations; Viscous flow computations; Problems for fast and unconventional ships. Ship Seakeeping: Introduction to seakeeping; Experimental approaches (model and full-scale); Waves and seaway; Airy waves (harmonic waves of small amplitude); Natural seaway; Wind and seaway; Wave climate; Numerical prediction of ship seakeeping; Overview of computational methods; Strip method; Rankine panel methods; Problems for fast and unconventional ships; Further quantities in regular waves; Ship responses in stationary seaway; Simulation methods; Long-term distributions; Slamming. Manoeuvring: Simulation of manoeuvring with known coefficients; Coordinate systems and definitions; Body forces and manoeuvring motions; Linear motion equations; CFD for manoeuvring; Experimental approaches; Manoeuvring tests for full-scale ships in sea trials; Model tests; Rudders; Computation of body forces; Slender-body theory; Influence of heel; Shallow-water effect; Jet thrusters; Stop manoeuvres. Boundary element methods: Green function formulation; Integral equations; Source elements; Point source; Regular first-order panel; Jensen panel; Higher-order panel; Vortex elements; Dipole elements; Point dipole. Numerical examples for BEM: Two-dimensional body in infinite flow; Theory; Numerical implementation.
Maritime Information Review
Author: Twenty-Second Symposium on Naval Hydrodynamics
Author: National Research CouncilPublisher: National Academies Press
ISBN: 0309065372
Category : Science
Languages : en
Pages : 1039
Book Description
The Twenty-Second Symposium on Naval Hydrodynamics was held in Washington, D.C., from August 9-14, 1998. It coincided with the 100th anniversary of the David Taylor Model Basin. This international symposium was organized jointly by the Office of Naval Research (Mechanics and Energy Conversion S&T Division), the National Research Council (Naval Studies Board), and the Naval Surface Warfare Center, Carderock Division (David Taylor Model Basin). This biennial symposium promotes the technical exchange of naval research developments of common interest to all the countries of the world. The forum encourages both formal and informal discussion of the presented papers, and the occasion provides an opportunity for direct communication between international peers.
Journal
Author: British Ship Research AssociationPublisher:
ISBN:
Category : Shipbuilding
Languages : en
Pages : 648
Book Description
Consists largely of abstracts of articles and papers of interest to shipbuilders, ship owners and marine engineers.
The Japan Shipbuilding Information Notes
Author: Interactions Between Wavemaking and the Boundary Layer and Wake of a Ship Model
Author: A. ShahshahanPublisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 146
Book Description
A detailed experimental study has been conducted in a towing tank on a 3.048 meter long mathematical model, known as the Wigley hull, to study the effects of viscosity on the wavemaking resistance of the ship form. The measurements included total resistance, viscous resistance, pressure distribution, and boundary layer measurements of the model at zero trim and sinkage. The three dimensional boundary layer measurements extend from midship to a distance of 0.1 model lengths downstream of the eastern and include the pressure distribution on the body, and three components of the mean velocity measured by means of a five hole pitot tube. These measurements were carried out of four Froude numbers of 0.266, 0.313, 0350 and 0.400. A numerical method has been employed to calculate the boundary layer characteristics along the streamlines on the hull which were obtained by using Guilloton's method. The wave-resistance coefficients of the ship form have been calculated by the Michell integral, using the Michell thin ship centerplane distribution, a hull surface distribution and a slender-body centerplane distribution. These calculations have been carried out only to first order and have been compared with the residuary resistance and the wave profile resistance.
Numerical Ship Hydrodynamics
Author: Takanori HinoPublisher: Springer Nature
ISBN: 3030475727
Category : Technology & Engineering
Languages : en
Pages : 442
Book Description
This book explores computational fluid dynamics applied to ship hydrodynamics and provides guidelines for the future developments in the field based on the Tokyo 2015 Workshop. It presents ship hull test cases, experimental data and submitted computational methods, conditions, grids and results. Analysis is made of errors for global (resistance, sinkage, trim and self-propulsion) and local flow (wave elevations, mean velocities and turbulence) variables, including standard deviations for global variables. The effects of grid size and turbulence models are evaluated for both global and local flow variables. Detailed analysis is made of turbulence modeling capabilities for capturing local flow physics. Errors and standard deviations are also assessed for added resistance (captive test cases) and course keeping/speed loss (free running test cases) in head and oblique waves. All submissions are used to evaluate the error and uncertainty by means of a systematic verification and validation (V&V) study along with statistical investigations.
Kinematics of Ship Wake Flow
Author: Karl WieghardtPublisher:
ISBN:
Category : Kinematics
Languages : en
Pages : 86
Book Description