COURSE UNIT TITLE

: RESISTANCE AND PROPULSION OF SHIPS

DEGREE PROGRAMMES

Description of Individual Course Units

Course Unit Code Course Unit Title Type Of Course D U L ECTS
NAV 5043 RESISTANCE AND PROPULSION OF SHIPS COMPULSORY 2 0 0 6

Offered By

Graduate School of Natural and Applied Sciences

Level of Course Unit

Second Cycle Programmes (Master's Degree)

Course Coordinator

PROFESSOR IZZET DENIZ ÜNSALAN

Offered to

NAVAL ARCHITECTURE
NAVAL ARCHITECTURE

Course Objective

This course aims the students to acquire the background for the basic principles of a ship resistance and propulsors. Fluid mechanics principles of the components of ship resistance are discussed, frictional, viscous pressure and wavemaking components are discussed in detail. Starting from the initial approach of Froude, modern towing tank techniques are discussed. Ship propulsion is studied with a special emphasis on screw propellers, their design and selection.

Learning Outcomes of the Course Unit

1   The basic principles of ship resistance and propulsor systems are covered, starting with general principles.
2   Experimental procedures and numerical prediction methods are presented.

Mode of Delivery

Face -to- Face

Prerequisites and Co-requisites

None

Recomended Optional Programme Components

None

Course Contents

Week Subject Description
1 1. Review of fluid mechanics for drag and lift 2. Formulation of ship resistance from the phenomenological point of view 3. Classification of marine craft from the point of view of support
2 1. Formulation of ship resistance from the dimensional point of view 2. Significance of Froude and Reynolds numbers 3. Towing tanks, approach of Froude. 4. ITTC 1978 methods
3 1. Frictional resistance 2. Viscous pressure resistance and form factor 3. Determination of form by experiment: Prohaska s method 4. Analysis of ship waves, Kelvin wave pattern 5. Reduction methods for ship waves and wave resistance, bulbous bows 6. Wave breaking resistance
4 1. Spray resistance 2. Wind resistance 3. Appendage resistance and its incorporation into total resistance 4. In-service resistance components: Wave added resistance 5. Steering resistance
5 1. Shallow water resistance 2. Hull roughness and its consequences 3. Effect of subsurface waves 4. Ice-breaking resistance
6 Exam #1
7 1. The path of energy in ship propulsion from fuel to propeller slipstream 2. Components of efficiency in ship propulsion 3. Hull-propeller interaction, wake and thrust deduction 4. Geometry of a screw propeller
8 1. Dimensional analysis for a screw propeller, nondimensional coefficients for propellers. 2. Simple momentum theory of propellers 3. Momentum theory of propellers with slipstream rotation 4. Airfoil theory and three-dimensional effects, cascade effect
9 1. Blade element theory 2. Vortex theory of propellers 3. Circulation about a propeller, Goldstein and Prandtl factors 4. Lifting line theory 5. Lifting surface theory
10 1. Cavitation phenomenon, phases of cavitation of a propeller 2. Determination of propeller blade area ratio: Burril diagram and Keller relation
11 1. Standard propeller series 2. Propeller selection processes by design charts 3. Example of a propeller calculation
12 Exam #2
13 1. Controllable-reversible pitch propellers 2. Nozzle propellers 3. Transcavitating propellers 4. Supercavitating and ventilated propellers
14 1. Tandem, contra-rotating and overlapping propellers 2. Grimm vane wheel 3. Propellers with reduced tip and boss vortices 4. Other nonconventional propellers

Recomended or Required Reading

Resistance and Propulsion of Ships, Sv. AA. Harald, Wiley, 1983
Basic Ship Theory, K.J. Rawson and E.C. Tupper, Longmans, 2006

Planned Learning Activities and Teaching Methods

The learning and teaching methods are class-based lectures and tutorial sessions, and problem-solving exercises.

Assessment Methods

SORTING NUMBER SHORT CODE LONG CODE FORMULA
1 MTE 1 MIDTERM EXAM 1
2 MTE 2 MIDTERM EXAM 2
3 FIN FINAL EXAM
4 FCG FINAL COURSE GRADE MTE 1 * 0.25 + MTE 2 * 0.25 + FCG * 0.5
5 RST RESIT
6 FCGR FINAL COURSE GRADE (RESIT) MTE 1 * 0.25 + MTE 2 * 0.25 + RST * 0.50


Further Notes About Assessment Methods

None

Assessment Criteria

To be announced.

Language of Instruction

English

Course Policies and Rules

To be announced.

Contact Details for the Lecturer(s)

To be announced.

Office Hours

To be announced.

Work Placement(s)

None

Workload Calculation

Activities Number Time (hours) Total Work Load (hours)
Lectures 12 2 24
Preparations before/after weekly lectures 12 5 60
Preparation for midterm exam 2 4 8
Preparation for final exam 1 8 8
Preparing assignments 6 5 30
Midterm 2 2 4
Final 1 4 4
TOTAL WORKLOAD (hours) 138

Contribution of Learning Outcomes to Programme Outcomes

PO/LOPO.1PO.2PO.3PO.4PO.5PO.6PO.7PO.8PO.9PO.10PO.11
LO.122332115322
LO.213221215232

CONTACT INFORMATION
Dokuz Eylül Üniversitesi Cumhuriyet Bulvarı No: 144 35210 Alsancak / İZMİR
Phone: +90(232) 412 12 12 - Fax: +90 (232) 464 81 35

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