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Description of Individual Course Units

Course Unit Code Course Unit Title Type Of Course D U L ECTS NAV 6004 HYDROFOIL THEORY AND APPLICATIONS ELECTIVE 2 0 0 7

Offered By

Graduate School of Natural and Applied Sciences

Level of Course Unit

Second Cycle Programmes (Master's Degree)

Course Coordinator

PROFESSOR ÇINAR EMINE YENI

Offered to

NAVAL ARCHITECTURE NAVAL ARCHITECTURE

Course Objective

Basic airfoil theory and airfoil/hydrofoil geometry. Mathematical tools: Conformal mapping. Joukowsky and Karman-Trefftz transformations. Thin and thick airfoil theories, Theodorsen s method. Cavitation and its prevention. Supercavitation. Applications to specific areas in marine field.

Learning Outcomes of the Course Unit

1   The basic principles of hydrofoil theory are presented, including thin and thick wing theories. 2   Applications related to marine field, such as propeller blades, hydrofoil surfaces, rudders and roll stabilizer foils are discussed.

Mode of Delivery

Face -to- Face

Prerequisites and Co-requisites

None

Recomended Optional Programme Components

None

Course Contents

Week Subject Description 1 1. General features of hydrofoils and aerofoils. 2. Geometry of a hydrofoil: thickness, camber, aspect ratio. 3. Lift, drag and circulation about a two-dimensional foil 2 1. Three dimensional airfoil theory, optimum circulation distribution 2. Factors affecting lift, calculation of zero-lift angle 3. Cascade and viscous effects 3 1. Conformal mapping theory. 2. Joukowski transformation 4 1. Kutta-Joukowski foil 2. Thin airfoil theory 3. Perturbation method for thin airfoils 5 1. Thick airfoil theory: Theodorsen's method 2. Three dimensional effects on various types of foils 3. Induced drag calculations 6 Exam #1 7 1. Cavitation phenomenon 2. Types of cavitation 3. Cavitation about airfoils 8 1. Theory of supercavitation 2. Applications of supercavitating foils 9 1. Application of hydrofoil theory to marine propellers 2. Various foil geometries used in marine propellers 10 1. Application of hydrofoil theory to rudders and fin stabilizers 2. Various rudder types 11 1. Hydrofoil boats 2. Various configurations of hydrofoils 3. Stability of hydrofoil boats 12 Exam #2 13 1. Sail theory 2. Various types of sails and their usage 14 1. Advanced concepts: Flettner rotor, blown rotor, blown foil, suction foil 2. Ground effect, analysis of a wing in ground effect 3. Ground effect vehicles and Power-Augmented Wing concepts

Recomended or Required Reading

BRESLIN, J.P., ANDERSEN, P. (1996) : Hydrodynamics of Ship Propellers, Cambridge Ocean Technology Series, Cambridge university Press, U.K. KATZ, J., PLOTKIN, A. (1991) Low Speed Aerodynamics, McGraw-Hill International Editions

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 MIDTERM EXAM 2 ASG ASSIGNMENT 3 FIN FINAL EXAM 4 FCG FINAL COURSE GRADE MTE * 0.25 + ASG *0.25 +FIN *0.50 5 RST RESIT 6 FCGR FINAL COURSE GRADE (RESIT) MTE * 0.25 + ASG *0.25 +RST *0.50

Further Notes About Assessment Methods

None

Assessment Criteria

To be announced.

Language of Instruction

Turkish

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 4 48 Preparation for midterm exam 2 15 30 Preparation for final exam 1 20 20 Preparing assignments 6 6 36 Midterm 2 2 4 Final 1 3 3 TOTAL WORKLOAD (hours) 165

Contribution of Learning Outcomes to Programme Outcomes

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