Annual Report 1996

December 1997

Report No. 1084 December 1997

ANNUAL REPORT 1996

Deift University of Technology Faculty of Mechanical Engineering and Marine Technology

Mekelweg 2, 2628 CD Deift The Netherlands

Ship Hydromechanics Laboratory

INTRODUCTION

This report contains an overview of the organisation and activities of the department of Ship Hydromechanics of the division of Marine Technology of the Deift University of Technology.

The division of Marine Technology is part of the Faculty of Mechani-cal Engineering and Marine Technology. Other departments in Marine Technology are the Ship Design department, the Ship Strength and Construction department and the Shipbuilding department All four departments are jointly responsible for the education and research in the field of Marine Technology.

From the educational point of view, 1996 was a year in which a larger than usual number of seven students graduated in the specialism of Ship Hydromechanics. In all cases the final year projects werecarried out in co-operation with industrial partners. In most of these cases the project involved the application of hydrodynamic insight or computa-tional methods and experiments in the process of gaining insight ina

practical problem or in to validate a particular design from a hydro-dynamic standpoint. In a nUmber of cases, use was made of numerical

tools available at the department to investigate aspects as the wave

forces on a floating production system or the behaviour of a supply

vessel alongside a large pipe-laying vessel. In five cases, experimental facilities of the department were used to gain insight in such effectsas

the green water on the deck of a flOating productin facility, the

cap-sizing behaviour of Ro-Ro passenger ferries, the behaviour of an SPM buoy and the hydrodynamic forces on a manoeuvring planing craft. We would like to express our appreciation for the unique opportunities which the industrial partners have given to our students in this phase

of their study and we look forward to our continuing good

co-opera-tion.

In this respect we especially want to thank the following

companies:

- Ailseas Engineering, DeIft - Sofec Inc. Houston

- MARIN, Wageningen - SBM Inc. Monaco - TNO-Bouw, Delft

CONTENTS

i

ORGANIZATION OF THE SHIP HYDROMECHANICS

LABORATORY

2 DOCTOR'S THESES

3 EDUCATIONAL PROGRAM

4 STUDENT THESIS

5 MEMBERSHIPS OF INTERNATIONAL ORGANIZATIONS

6 CONTRIBUTIONS TO SYMPOSIA, CONGRESSES ETC.

7 PUBLIC ASSISTANCE

8 SCIENTIFIC SUPPORT TO PROJECTS IN OTHER

FACUL-TIES

9 RESEARCH

lo RESEARCH FACILITIES OF THE SHIP HYDROMECHA-NICS LABORATORY

il

1. ORGANIZATION OF THE SHIP IIYDROMECHANICS LABORATORY Mékelweg 2, 2628 CD Deift, The Netherlands Phone: +31 15 2786882 Fax: +31 1:5 2781836 E-mail:: Secr.hydromech@WbMT.TUDelft.nl PhOne: +31 15-Board:

Prof.dr.ir. J.A. Pinkster (chairman) 2783598

Dr.Ir. JA. Keuning (secretary) 2781897

Ir. J.M.J Journée (member) 2783881

Ing A. Goeman (member) 2781893

Permanent Staff:

Prof. dr.ir. J .A. Pinkster 2783598

Prof.dr.ir. G. Kuiper 2786860

Ir. J.M.J. Journée 2783881

Dr. ir. J.A. Keuning 2781897

Dr.ir. H.J. de Koning Gans 2781852

Ir.. J. Ooms 2783876

Ing. A.A.M. van Gulik 2784684

Ing. A. Versluis 2783871

Instruction- and Research Assistants:

Ing. C. Born 2786870

Ing. A Goeman . '2781!893

P.W. de Heer 2786873

Librarian:

P.W. de Heer 2786873

E-mail: P.W.deHeer@ WbMT. TUDe1ft.nl

Laboratory Manager:

Ing. A. Goeman 2781893

Electronic Devices:

Ir. J. Ooms 2783876

R. van den Oever 2781590

Models:

C.A.C.M. van der Bergh 2786875

Mechanic Devices:

Ing. C.P. Poot

H. van der Hek _2786877

Ph.D. Students:

Arun Kr. Dey, BScEngg. MSc. CEng. 2781570

Ir. J.C. Moulijn 2785562

Ir. A.P. van't Veer

During this year the following persons left the Ship Hydromechanics Laboratory:

2. DOCTOR'S THESES

At the Ship Hydromechanics Laboratory the following persons were working on their doctor's thesis:

Doctor's Thesis, April 25, 1996 at the Delft university of

Technology

Terwisga, Tom J.C. van on the Theme: 'Waterjet-Hull Interaction'

Supervisor: Prof.dr.ir. G. Kuiper

Doctor's Thesis, October 14, 1996 at the Delft University of Technology

Arun Kr. Dcv, BScEngg. MSc. CEng. on the theme: 'Hydrodynamic Aspects of Moored Semi-Submersibles in Extreme Seas'

Supervisor: Prof.dr.ir. J.A. Pinkster

Veer, Ir. A.P. van 't

'Catamaran Sea-Keeping Predictions' Supervisor: Prof.dr.ir. J.A. Pinkster

Mouhjn, Ir. J.C.

'Motions and added resistance of Surface Effect Ships'. Supervisor.: Prof.dr.ir. J..A. Pinkster

3. EDUCATIONAL PROGRAM (in Dutch)

Prof.dr.ir. J.A. Pinkster

'Ship Motions and Steering I' Part 1: Ship Motions

Part 2: Steering and manoeuvring Part 3: Waves

'Ship Motions and Steering II' Part 1: Steering

Part 2: Ship Motions

Prof.dr.ir. G. Kuiper

MT512, 'Resistance and Propulsion' (in English)

Ir. J.M.J. Journée

X2MT1, 'Offshore Hydromechanics'

Xl,

Dr.Ir. J.A. Keuning

WbmlO7, 'Technical Systems'

4. STUDENT THESES 08-02-1996 10-04-1996 25-10-1996 13-12- 1996 Beenen, M.

'Hydrodynamiç analysis of a small Tension Leg

Platform in deep water'.

Cozijn, J.L.

'Development of a calculation tool for green water simulation'.

12-07-1996 Kernkamp, A.J.

'Motion Behaviour of Pipe Suppliers Alongside

29M8- 1996 Berg, E.G. van den

'Resistance PredictiOn using Local Linear Kernel Estimation'.

23-10-1996 Dijk, J.M.

Dynamic capsize behaviour of passenger roro-vessels in waves'.

Toxopeus, S.

'A tome domain simulation program for manoeuvríng of planing ships'.

Heyl, C.N.

'Prediction of wave loads and motions of a calm

5. MEMBERSHiPS OF INTERNATIONAL ORGANIZATIONS - Member Advisory board Offshore MARIN.

- KIVI/MarTec, Chainnan.

- Ocean Engineering: International editor.

- International Shipbuilding Progress (ISP): Senior editor.

- SNAME

- mt. Techn. committee of Offshore Racing Council, London - High Speed Marine Vehicles Committee of the International Towing

Tank Conference

- Chairman of the Organisation Committee of International Symposium on Yacht Design and Yacht Construction

6. CONTRIBUTIONS TO SYMPOSIA, CONGRESSESetc.

'Fluid momentum in ship hydronmechanics' by W. Beukehnan

CRF-96 Conference, June 3-9, St. Petersburg, Russia

'The behaviour of ships in a seaway' by J.M.J. Journée

AlO-Course of J .M. Burgerscentrum. on "Free surface waves 20 - 24 May 1996, ISBN: 90-370-0142-4

Pinkster, J.A.,

'Hydrodynamic Aspects of Floating Offshore Structures' by J.A.

Pinkster

AlO-Course of J .M. Burgerscentrum on "Free surface waves", 20 - 24 May 1996, ISBN: 90-370-0154-8

'Scheepvaart' doorJournée, J.M.J., A.C.M. Baaten, J. Ooms and

J. Piiìkster

Schip en Werf de Zee, 6ejaargang, augustus, september en oktober

1996

'Design optimisation of a fast monohull' by J.A. Kewiing and J.

Pinkster

CRF'96 Conference, Jú'ne 3-9, 1996, St. Petersburg, Russia

'Design analysis for grounding experiments' by Jo.A. Pinkster,

Paul P.M. Lemmen and Alex W. Vredeveldt,

TNO Centre for Mechanical Engineering and Deift University of

Technology, Proceedings International Conference on Design and

Methodologies for Collision and Grounding Protection of Ships,

SNAME/SNAJ, San Francisco, California, August 22-23, 1996.

'Statistical aspects of simulations' by J.A. püiksteù

MARIN Training Course Offshore Hydrodynamis, Volume i 47

7. COMMERCIAL WORK.

During this period considered the Laboratory, besides its normal research, provided (payed) services for Industry and Government. This inclUded model tests, full scale trials studies etc In 1.996 the next projects have been carried out:

- 'Motions of Surface Effect Ships',

MARIN - Wageningen and The Dutch Navy- The Hague

- 'Motions and Mean Drift Forces of Solitaire', Allseas Engineering, Postbus 5074, 2600 GB Delft - 'Vergelijkende metingen van twee motorreddingsboten',

Koninldijke Nederlandse Reddings Mij., Haringkade 2, 1976 CP Iimuiden

- 'Instrumentation for Trial Test Measurement Equipment NSDRC-postproject',

Digital Equipment By, Postbus 1068, 3430 BB Nieuwegein. - 'Wash Metingen aan de Grote Stern'

Damen Shipyards By, Postbus 1, 4200 AA Gorinchem - 'Motions of Bijisma Trader 9000 in a Seaway',

Bureau Ventas, Postbus 2705, 3000 CS Rotterdam

- 'Comparative Full Scale Tests ith a Rotary Wing Keel',

Lumiflex Precision Engineering, P.O. Box 28056, 3828 ZH Hoogland

- 'Modeiproef Electrische Rondvaartboot',

Sectie Productie en Constructieve Vormgeving', Faculteit der Werktuigbouwkunde en Maritieme Techniek, TU DeIft

- 'Shipping water due to snapping of the hoisting wire of a crane', De Merwede Shipyard, Hardinxveld- Giessendam

8. SciENTIFiC SUPPORT TO PROJECTS IN OTHER FACULTIES

During 1996 support was given to a ni.imber of final year student projects from other faculties within the Deift University of

Techno-Iogy A brief review is given of the nare of the support for the

various projects:

Support : Experiments and 3-dimensional diffraction calcula-tions on the effectivity of a deep water breakwater. Membership of examination committee.

Model tests were carried out by the student in wave tank #2. Computations were carried out using DELFRAC

Thesis

: 'The Deep Water Breakwater"

Faculty : Civil Engineering,

Coach : Prof. dr. ir. J.A. Battjes

Support : General support on ship motions.

Membership of examination committee

Thesis

: 'Evaluation of a Polyester Taut Mooring in Deep

Water'

Coach : Prof. dr. ir. J.H. Vugts

Support : General support n platform motions.

Membership of examination committee

Thesis

: 'Extreme Response Statistics of Tension Leg

Platforms'

Student : S.F. Castillo

Faculty : Civil Engineering

Coach : Prof. dr. ir. J.H. Vugts

Membership of examination committee

Thesis : 'Feasibility Study of a Floating Airport supported

by Air Cushions'

Student M. Edelman

Faculty Civil Engineering

Coach

Prof. dr. ir. J.H. Vugts

Support : General support on platform mot ions.

Membership of examination committee.

Thesis

: 'Dynamic Behaviour of Taut Moorings in Deep

Water'

Student : J.A. Lemmens

Faculty : Civil Engineering

Coach

: Prof. dr. ir. J.H. Vugts

Support : General support on platform behaviour in waves.

Membership of examination committee.

Thesis :

'Optimisation of a Conventional Deep Water

Anchorline'

Student : M.T.A. Weustink

Faculty : Civil Engineering

Coach

: Prof. dr. ir. J.H. Vugts

In co-operation with the J.M. Burgers Center for Fluid Dynamics the department contributed to a workshop on the topic of Applied Fluid Dynamics organised in June 1996 in Delft for the benefit of PhD. students of the universities of Groningen, Twente, Eindhoven and Delft.

9. RESEARCH

The field of shiphydromechanics covers

aspects of the

interaction between the surrounding water and fixed or floating

structures. This interaction manifests itself in fluid motions and

pressures, hydromechanic loads on the structures and in the motion behaviour of the structures.

For an optimisation of the design or the maritime operations of vessels and floating structures in still water and in waves, an insight in the physical aspects of the hydromechanic behaviour of these structures is essential. Based on insight in these physical aspects, mathematical

models need to be developed for the determination

of the

In still water, the resistance and the propulsion in relation to the

forward speed is an important factor. Savings on energy can be

obtained by an improved design of the hullform and an iñcrease of the propulsive efficiency. The results of research in this field are a basis for a full technical-economical analysis of alternative design concepts,

such as prime costs, investments, operational costs and profits.

Research on wind propulsion and other alternative propulsors will contribute to these aspects too.

Together with the dynamic behaviour of a ship during an ingress of water after a collision, the stability of the intact and the damaged ship

is defining 'for the safety of the crew and the ship. Manoeuvring

properties are of importance for the safety of ships Insight in the

physics are required, not only to improve these properties but also for developing manoeuvring simulators, marine traffic systems, etc.

The linear and nonlinear dynamic behaviour of ships and other

maritime structures in waves depends on the hydromechanic loads and

the wave loads. This dynamic behaviour is of major interest with

respect to the strength of the structure, mooring loads, shipping water, slamming, systems to reduce motions, dynamic positioning and safety..

Also secundary effects,

like optimum routeing, increase of fuel

ships, catamarans, SES (Surface Effect Ships) and SWATH (Small shipform and his curve of statical stability, and a HPGL-file of the linesplan, to print or plot the shipform.

A new serie of hydrostatic programs has been developed (care-ne, trimdiagram and stability), based on a panel-distribution of ship or offshore structures.

The accuracy will be higher than the programs used nowadays, because all patticular forms can be panelised include all kinds of appendages. The' input will be given in the same

format as other programs based on panels (e.g. the Delft Diffraction Program 'Delfrac").

3-D Diffraction,

prof.dr.ir. J.A. Pinkster

The behaviour of moored structures in irregular sea conditions is to a large extent governed by the non-linear second order low frequency wave, drift forces and moments. PredictiOns of the wave frequency motions can be based on frequency domain information on the linear part of the wave exciting force in 'regular waves. Non-linear second order wave forces can, be determined based on knowledge of the quadratic transfer function of the drift forces in bi-chromatic waves. The DELFRAC 'code 'has been extended to be able to compute' these quadratic transfer functions.

In order to be able to analyse the behaviour of large stationary air-cushion supported floating structures in waves, the 3-dimensional

diffraction code was extended to be able to account for multiple

connected or non-connected áir cushions under a single rigid floater. The code was developed to take into, account static air cushions , i.e.

air cushions which are assumed not to leak air. Such air cushions can be deeply submerged under the structure. In the numerical model the free-surface within an air-cushIon is modelled by means of panels representing pulsating sources. Each panel is treated as a body with no material mass but having properties such as added mass, damping and restoring forces due to the air cushion and hydrostatic restoring.

forces. Each panel has one degree of freedom being the vertical

motion. In 1997 model tests will be carried out to validate the results of computations.

Behaviour and safety of ships,

ir. J.M.J. Journée

A method to obtain the dynamic swell-up of the incoming waves, caused the oscillating ship, was developped further on. This method has been used in freeboard calculations, carried out for the SLF Load Lines Working Group of 1MO.. A new computer code was developped to compare the methodologies proposed by Germany, China: and Japan and the Deift method for obtaining the bow height and the freeboard of a ship. This approach includes the hydromechanic behaviour of the ship, obtained by one and the same computation method.

In cooperation with the Ship Design Section, the hydromechanic and hydroelastic behaviour of a pilot vessel have been investigated, using

results of full scale experiments in the North Sea. The results are

summarised and discussed in a paper for RINA, to be presented at Gothenburg.

Extensive capsize tests with 'two Ro-Ro models were completed and analysed. In cooperation with TNO-CMC and DGSM, a selection of

these data are being used now in a joint paper for the STAB'97

Conference in Varna.

A theoretical model to. describe the loads caused :by sloshing in tanks with low water levels has been completed and verified with

experi-mental model' data on oscillating liquid cargo tanks of a product

carrier. The results will be presented in a paper for the STÄB'97

Conference in Varna.

Experiments on the dynamic behaviour of a vessel after snapping of the hoisting wire of a crane have been conducted and analysed. The

results will be used to verify time domain computations, using

Cummins equations.

In behalf of Bureau Ventas, a theoretical study has been carried out

to obtain the operatiónal limits of a container vessel with limited

dimensions.

Yachts,

ing. A. Versluis

For a user's friendly operation of the VPPDe1ft program (Velocity

Prediction' Program DeIft), the control program "TVeloP' has been developed.

The analysis of the DeIft Systematic Yacht Hull Series has been

extended to incorporate new tests data on a wider variety of designs. Additional experiments have been carried out and calculation routines have been developed to assess the appendage resistance of sailing

yachts. A project has been started subsidized by a NIM grant and a

group of 8 Dutch designers to update and extend the Velocity Predic-tion method previously developped by the department.

F

*

F

RK

Advanced ships,

drir. J.A. Keuning

The program to calculate the non-linear behaviour of fast monohulls has been further tested and improved. This method has been used to develop further an improved fast monohull concept, known as the

"Enlarged Ship Concept". Based on assumptions regarding the

operability limits of fast ships in waves this concept has been proven to yield significant improvements over excisting designs. A study has been carried out for a Dutch yard to develop a fast ocean gcing patrol vessel along these lines, which will be build in 1998.

A large experiment has been carried out on the resistance, trim and sinkage of a 20 degrees deadrise series as part of the Delft Systematic Deadrise Series, which data will. be used to improve the existing prediction techniques.

A pilot study has been started on the wash generated by fast ships. This is becoming an increasing problem when fast ferries and patrol boats are being used on inland waters. A method to develop more insight in the problem and to create relevant, criteria and calculation procedures has been set up,.

ENLARGED SHIP CONCEPT

lOOxL

(260Om.)

1.25 x L

iiiiEEE5' (33.00 m.)

Fg. I The M enlarged altemailnee teen9 arte dtC baten vessel, emfigurdlion.

1.50 x L (40.00'm.)

Flow calculations,

dr.ir. H.J. de Koning Gans

A higher order surface panel method for flow calculations with curved panels and a non-linear singularity distribution has been developed further on. This method has been evaluated for the determination of the hydròdynamic influence of a moving ship or a rotating propeller.

For the input of arbitrary shaped bodies, a grid generatión program

has been developed. A start has been made with the development of

a method for the calculation of unsteady free surfaces, using

curvilinear coordinates at the free surface. Intersectión calculations of the ship hull and free surfaces have been implemented.

In cooperation with MARIN at Wagenigen, a propeller geometry grid generation program has been developped.

Manoeuvring,

prof.dr.ir. J.A. Pinkster and ing. W. Beukelinan

In 1996 the final reports of the experiments with wing-shaped vessels were completed. A publication on this subject was presented at an international conference in St.Petersburg.

A prediction method for determining the interaction effects of ships

passing in close proximity to each other has been applied to thecase

of a vessel approaching an underwater obstacle. The purpose of this study was to assess the importance of the hydrodynamic interactión

effects on the manoeuvre of the

The findings

incorporated in a publication presented at an international conference.

Fluid momentum in ship hydrodynamics,

W. Beukehnan

CRF'96 Conference: 3-9 June 1996. St. Petersburg, Russia

Introduction

The rate of change of fluid momentum is a very significant characte-ristic to determine important phenomena in ship hydrodynamics such

as motions in waves, slamming, lift forces on hull and rudder,

Three of these phenomena will be considered closer here, especially the calculation methods viz.:

- slamming

- lift production of thehull

- manoeuvring

For slamming the impact force is determined, with aid of fluid

momentum exchange and strip theory including forward speed

influence.

To determine the lift forces and -moments and also the hydrostatic-and dynamic manoeuvring coefficients the ship hull is considered to

be a low aspect-ratio surface piercing wing. The determination is

based upon potential theory making use of the variation of the added mass impulse or the rate of change of fluid momentum.

Transformation from seakeeping to manoeuvring notation is used to arrive at expressions for sway and yaw derivatives applicable for both deep and shallow water.

CAHKT-ÎIETEPBYPF

Reduction of waterdepth causes a strong increase of lift and conse-quently also of manoeuy ring derivatives.

The calculated results are related to the linear part of the coefficients, which means_validityonl.y-at-smalldriftangles-or-angles-of-attacic.-As

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ir. J. Ooms

In 1995 a start was made to determine the transfer function and

waveheight capabilities of the wavemaker in the No. i Towing Tank.

At the. end of that year measurements were carried out to erify a

simple mathematical model of the wavemaker. The results of these tests were reported in 1996. Using the results the mathematical model was refined. It was also shown that, dúe to the non-ideal motion of the waveflap, the wavemaker generates too much harmonic distortion in

the waves. At high values of wave steepness this may result in

premature develópment of breakers which renders the. waves useless.

The results also proved useful for day to day operation of the

wavemaker.

The verified and extended mathematical model was also. incorporated into a program to calculate the control signals for the generation of irregular waves witha certain, specified, spectrum. Unfortunately, this caused difficulties. due to poor convergence of an iterative parameter estimation procedure used. Another problem was. to properly model the very steeply increasing spectralidensity of the JONS WAP spectrum at low frequencies. A possible solution to the second problem was found but has still to be verified and included into the program.

The completion of the generation program for irregular waves will be the main target for 1:997. Also means will be sought to reduce the

harmonic distortion due to the waveflap. It is hoped that this will

result in increased waveheights that can be generated at high wave frequencies.

Surface Effect Ships,

ir. J.C. Mouhjjn AIO)

The goal of this PhD project is to develop and validate a computa-tional method for motions. and added resistance of Surface Effect Ships

(SES) sailing in waves. This project is financially supported by

MARIN and the Royal Dutch Navy..

A 3D panel code 'has beendeveloped. The panel method can calculate the unsteady hydrodynamic forces on the hulls of the SES and! the wave height in the air cushión and at the seals. The interaction of the air cushion and the free surface is taken into account.

Steady wave pattern of a large SES.

This interaction appears to have a damping effect on heave motions in the high frequency' range.

A non-linear bag stern seal' model has been developed and imple-mented in a simulation method for the motions of SES. Air leakage under the stern, seal also has a damping effect on heave motions 'in the high frequency range. When cushion-wave interaction and non-linear air leakage are taken into account, the calculated 'heave motions of the

Unfortunately the computational method overpredicts the pitch motions at the pitch resonance frequency. However, this resonance occurs at a very low frequency and is because of the high speed of SES at the boundary of the frequency range of interest.

Multi-hull vessels,

ir A.P. van 't Veer (AJO)

A computer program (SEASCAPE) has been under development which calculates the steady and unsteady velocity potential around a monohull or catamaran vessel. The program is a 3D panel method with Rankine singularities positioned on each flat quadrilateral panel. The steady part of this program calculates the double body potential

and the steady wave potential. The unsteady part of the program

calculates the motions and loads on the vessel sailing with forward speed in waves in the frequency domain.

The steady part of the program has been finished, the unsteady part of the program is still under development. Model experiments with a catamaran vessel have been carried out in the Towing Tank No. i of the Ship Hydromechanics Laboratory.

The test program included still water resistance tests, measuring the trim and sinkage of the model, heave and pitch motion tests in head

waves for Fn = 0.30 up to Fn = 0.75, heave and pitch oscillation

tests and wave force measurements in head waves.

10. RESEARCH FA CIL! lES OF THE SHIP HYDRO-MECHANICS LABORATORY

For experimental research the Ship hydromechanics Laboratory has at its disposal of the following facilities:

TOWING TANK NO. ¡

Length : 142.00 m

Width : 4.22 m

Water-depth : 2.50 m

Carriage : manned, motor driven

Carriage speed : 7.00 rn/s (maximum)

Capabilities : Horizontal and Vertical PMM can be fitted

Wavemaker type : flap type, electronic/hydraulic

Wavelength : length 0.30- 6.00 m, regular and irregular

Tests performed : Resistance in calm water and waves.

Open Water Propeller test.

PMM-test on floating and submerged bodies, foils etc.

Wave induced motions and loads on .ships and floating. and moored structures

Slamming phenomena.

Length Width Water-depth Carriage Carriage speed Wavemaker type Wave length Test performed

TOWING TANK NO. 2

85.00 m

2.75m

1.25m

manned, motor driven 3.00 mIs (maximum)

flap type, electronic/hydraulic

length 0.40 - 6.50 m, regular and irregular Resistance and self-propulsion in calm water and waves.

Open Water Propeller tests.

Wave inducec motions and loads on ships and floating and moored structures upright and heeled sailing yacht tests.

cAVITATION TUNNEL

Facility Kempf und Remmers, closed recirculation

tunnel.

Drive system : 4-bladed axial flow propeller with Ward

Leonard' control.

Motor Power F5 Kw,, (total) - 2920 rpm.

Pressures 102 kPa (max) - 11 kPa (mm)

Instrumentation : Propeller dynarnometer, 5-hole pitot-tube, various pressure. sensors, Laser Doppler Anemometry.

Type and location of torque and thrust

dynamometer balance T- and Q' dynamometer at the end

of propellr shaft,

Tmax 400 N, Q,max 10 Nm.

Propeller or model.

size range : Propeller diameters from 50 - 160 mm.

Tets. performed :. Propeller tests in uniform flows. Forces..and pressure. distributions on rudder, fins etc.

11. REPORTS AND PUBLICATIONS OF THE SHIP HYDRO-MECHANICS LABORA TORY

Heer, P.W. de, 'Annual Report 1995',

Report No. 1045-1996, Delft University of Technology Beukelman, W.

'Manoeuvring coefficients for a wing model in deep and shallow

water'.

Experimental results, Part I Calculations, Part II

Report No. 1046-1996, Deift University of Technology Cozijn, J.L..,

'Development of a calculation tool for green water simulation', Script

'TIPHYS - 2D, Manual for 2D nonlinear panel method program used for the calculation of free surface gravìty waves', Student Thesis

Report No. 1047-S-1996, Deift University of Technology Beukelman, W.,

'Fluid momentum in ship hydronmechanics',

CRF-96 Conference, June 3-9, St. Petersburg, Russia Report No. 1048-P-1996, Deift University of Technology Journée, J.M.J.,

'The behaviour of ships in a seaway',

AlO-Course of J. M. Burgerscentrum on "Free surface waves", 20 - 24 May 1996, ISBN: 90-370-0142-4

Report No. 1049-P-1996, Delft University of Technology

Pinkster, J.A.,

'Hydrodynamic Aspects of Floating Offshore Structures', AlO-Course of J. M. Burgerscentrum on "Free surface waves", 20 - 24 May 1996, iSBN: 90-370-0154-8

Moulijn, J.C,

'Motions of Surface Effect Ships',

Commissioned by: MARIN, Wageningen and The Dutch Navy, The Hague

Report No. 105i-O-1996, Deift University of Technology Pinkster, J.A.,

'Motions and Mean Drfl Forces of Solitaire',

Commissioned by Ailseas Engineering, Postbus5074, 2600 GB Deift Report No. 1052-O-1996, Deift University of Technology

Journée, J.M.J., A.C.M. Baaten, J. Ooms and J. Pinkster 'Scheepvaart',

PUblication in:

Schip en Werf de Zee, 6e jaargang, augustus,

Report No. 1053-P-1996, DeIft University of Technology Ooms,J..,

'Vergelifkende metin gen van twee motòrreddingsboten',

Opdrachtgever: KoniUklijke Nederlandse Reddings Mij., IJmuiden Report No. 1054-0-1996, Deift University of Technology

Ooms, J.,

'Instrumentation for Trial Test Measurement Equipment NSDRC'-postproject',

Commissioned by: Digital Equipment By, Postbus 1068, 3430 BB Nieuwegein.

Report No. 1055-O-1996, Deift University of Technology Keuning, J.A. and J. Pinkster,

'Design optimisation of a fast monohull',

CRF'96 Conference, June 3-9, 1996, St. Petersburg, Russia Report No. 1056-P-1996, Deift University of Technology Kernkamp, A.J.,

Keuning, J.A.,

'Wash Metin gen aan de Grote Stern'

Opdrachtgever: Damen Shipyards By, Postbus 1, Gorinchem Report No. 1058-O-1996, Deift University of Technology Dey, Arun Kr. MSc

'Viscoue Effect in Drift Forces on Semi-Submersibles', Doctor's Thesis (Price Dfl. 50,00)

Report No. 1059-1996, DeIft University of Technology Berg, Erwin van den,

'Probability based Prediction from Measurements using Gaussian Interpolation' + Appendices, Script,

'Resistance Prediction using Local Linear Kernel Estimation', Student Thesis.

Report No. 1060-S-1996, Delft University of Technology Pinkster, Jo A., Paul P.M. Lemmen .and Alex W. Vredeveldt,

'Design analysis for grounding experiments',

TNO Centre for Mechanical Eng. and DeIft Univ. of Technology Proceedings mt. Conf. on Design and Methodologies for Collision and Grounding Protection of Ships, SNAME/SNAJ, California, 1996. Report No. 1061-P-1996, Deift University of Technology

Ooms, J.,

'Wavemaker capabilities

of the

¡

_{at the DeW}

Shiphydromechanics Laboratory',

Report No. 1062-1996, Delft University of Technology Ooms, J.,

'User 's notes for the wavemaker at the Nr. ¡ model basin at the Deift Shiphydromechanics Laboratory',

Report No. 1063-M-1996, Deift Unìversityof Technology Journée, 'J.M.J.

'Motions of Bijisma Trader 9000 in a Seaway ',

CommissiOned by: Bureau Ventas, Postbus 2705, 3000'CS Rotterdam Report No. 1064-O-1996, Delfi University of Technology

Toxopeus, Serge

'Model experiments on dynamiC stability of planing ships' and 'Mathemetical model of the behaviour of planing ships', Script. A time domain simulationprogram for manoeuvrzng ofplaning ships Student Thesis.

Report No. 1065-S-1996, Delft University of Technology Dijk, J. Marijn,

'Dynamic capsize behaviour of damaged passenger ro-ro-vessels in waves', Student thesis

'Dynamic capsize behaviour of damaged passenger roro-vessels in waves', Part 1.

'Simulation of the capsize mechanism', Part 2...

Report No. 1066-S-1996, Deift University of Technology Heer, P.W. de, J. Gerritsma and LA. Keuning

'Selected Papers HISWA Symposium on Yacht Architecture 1969 -1995',

ISBN: 90-370-0146-7 (Book, price Dfl. 95,00)

Report No. 1067P1996, Deift University of Teçhnológy Ooms, Ir. J.,

'Comparati ve Full Scale Tests with a Rotary Wing Keel',

Commissioned by:Lumiflex Precision Engineering, P.O. Box 28056, 3828 ZH Hoogland

Report No. 1068-O-1996, Deift University of Technology Peters, O.A.J.,

'Time Domain Simulation with Stationary Vessels' and

'Effect of Aircu.chions applied to Floating Storage Units', Script Report No. 1069-S-1996, Deift University of Technology Keuning, J.A. en R. Onnii..,

'Modelproef Electrische Rondvaartboot',

Journée, J.M.J.

'Shipping water due to snapping of the hoisting wire of

_{a crane',}

Commissioned by: De Merwede Shipyard, Hardinxveld- Giessendam Report No. 1072-O-1996, Deift University of Technology

Heyl, C.N.,

'Model tests on hydrodynamic properties of a calm buoy', 'Prediction of wave loads and motions of a calm buoy', Student thesis

Report No. 1073-S-1996, Deift University of Technology

Pinkster, Prof.dr.ir. JA.,

'Statistical aspects of simulations',

MARIN Training Course Offshore Hydrodynamics, Volume 1, 4-7 November 1996

Report No. 1074-P-1996, DeIft University of Technology

Reports not marked with

fax at a price of Dfl. 25,

mailing expenses by P.W. de Heer. An invoice will be included;

please do not send payment in advance. If you want the 'Catalogue of Reports' of the Ship Hydromechanics Laboratory send a letter or E-mail .W. deHeer@wbmt.tudelft.nl.