• Shipbuilding, Semester 2, position 1

Within the course, students are introduced to the fundamentals of ship propulsion. Special attention is paid to the physical phenomena that characterize the operation of propellers. The study focuses on the complex conditions under which propellers operate, specifically examining propeller-ship interaction and the influence of propeller geometry and ship stern form on hydrodynamic performance. Students are trained to independently determine the optimal propeller characteristics using common engineering methods while considering specific requirements and determining the necessary specifications of the main engine for propelling a typical seagoing cargo ship. Besides, students are introduced to a range of modern technical solutions aimed at enhancing the efficiency of a ship's propulsion system, as well as various regulations concerning technical and environmental requirements related to ship propulsion.

1. The student has developed a thorough understanding of the fundamental physical principles that underlie ship propulsion. Within this framework, both traditional and contemporary methodologies for addressing complex physical phenomena are explored, to determine the optimal characteristics of a propulsion system in alignment with design requirements. The student is acquainted with the model-scale experiments on propeller performance, as well as the procedures required to extrapolate and apply these findings to full-scale propellers. 2. The student adeptly applies a comprehensive understanding of mathematics, fluid mechanics, and fundamental engineering principles to assess the hydrodynamic performance of a propeller. 3. The student demonstrates the ability to critically analyze the impacts of both the basic geometric and hydrodynamic characteristics of propellers, taking into consideration the complex water inflow, particularly influenced by the stern design of typical seagoing vessels. This analysis aims to optimize ship propulsion. 4. The student can evaluate specific propeller characteristics to enhance the energy efficiency of the ship's propulsion system, leading to greater operational economy and minimized environmental impact. 5. The student is qualified to choose and apply appropriate empirical and numerical methods to determine the hydrodynamic characteristics of optimal propeller and required propulsive power while considering the design requirements and limitations of the methods employed. 6. The student can select and critically evaluate relevant technical literature and other sources of information to address complex problems in the field of ship hydrodynamics, with a particular focus on determining ship propulsion performances. 7. The acquired knowledge enables the student to address complex engineering challenges and meet specific design requirements imposed by contemporary trends in naval architecture, particularly those related to ship propulsion.

The student gains an understanding of the fundamental physical phenomena defining propeller operation, including the interaction between the ship's hull and the propeller, the coordinated functioning of the propeller and engine, and the processes involved in propeller selection and design using common engineering methods. Special emphasis is placed on both open-water propeller tests and self-propulsion tests, enabling students to acquire the essential skills to conduct, manage, or commission such tests and effectively analyze their outcomes. Detailed analysis is conducted on the transmission of power from the engine to the propeller, as it significantly influences the characteristics of the optimal propeller and the required power of the main engine. In addition, students are acquainted with a range of contemporary technical solutions aimed at enhancing the efficiency of ship propulsion systems, along with relevant regulations on technical and environmental requirements in ship propulsion. Lastly, students are introduced to a diverse range of propulsors, some of which are based on traditional propeller designs (such as propellers in nozzles, counter-rotating propellers, tandem propellers, etc.), while others represent more innovative designs found in relatively uncommon ship types or vessels (such as water-jet propulsors, propulsors with vertical wings, etc.). In addition, theoretical instruction covers the fundamental elements necessary for conducting sea trials, particularly concerning ship propulsion.

As part of practical teaching, alongside the typical computational tasks accompanying theoretical chapters, there is a particular emphasis on the development of an individual and independent project (which continues on the project from the course Ship Resistance). Projekt se, ukratko, sastoji u sprovođenju proračuna primenom uobičajenih inženjerskih metoda (neki od njih i uz upotrebu računara), s ciljem da se odabere/projektuje optimalan propeler, odnosno odabere adekvatan brodski motor. In short, the project entails implementing calculations using standard engineering methods, including computer/software applications, to select or design an optimal propeller and determine the characteristics of an appropriate main engine. Special attention is paid to the energy efficiency of the adopted solution.

Exam passed in Ship Resistance.

Extracts from lectures (handouts)/In Serbian Instructions for project design /In Serbian Additional literature obtained during lectures Internet resources

Total assigned hours: 75

New material: 30
Elaboration and examples (recapitulation): 0

Auditory exercises: 10
Laboratory exercises: 0
Calculation tasks: 10
Seminar paper: 0
Project: 10
Consultations: 0
Discussion/workshop: 0
Research study work: 0

Review and grading of calculation tasks: 0
Review and grading of lab reports: 0
Review and grading of seminar papers: 0
Review and grading of the project: 10
Test: 0
Test: 0
Final exam: 5

Activity during lectures: 5
Test/test: 0
Laboratory practice: 0
Calculation tasks: 0
Seminar paper: 0
Project: 35
Final exam: 60
Requirement for taking the exam (required number of points): 30

E. Lewis,(editor): Principles of Naval Architecture (Chapter VI – Propulsion), SNAME, Jersey City, 1988. ; SNAME’s Principles of Naval Architecture Series: Propulsion, Justin E. Kerwin and Jacques B. Hadler, 2010.; A. F. Molland, S. R. Turnock and D. A. Hudson, Ship resistance and propulsion, Cambridge University Press, 2017.; John Carlton, Marine Propellers and Propulsion, Butterworth-Heinemann, 2012.; Radojčić, D., Kalajdžić, M., Simić, A., Power Prediction Modeling of Conventional High-Speed Craft, Springer, 2019.