Courses

Thermal Engines

General

Course Contents

Introduction: Basic principle, definition of a turbomachine, coordinate system, relative velocities.
Velocity diagrams for an axial flow compressor stage, the fundamental laws.
Compressible flow analysis, flow coefficient, performance characteristics for high speed machines.
Thermodynamic analysis of internal combustion engines (Otto cycle, Diesel cycle, Dual cycle)
Introduction: Basic principles, historic evolution of internal combustion engine, engine classifications, engine operating cycles, engine components.
Engine design and operating parameters.
Kinematics and force analysis of internal combustion engines.
Thermochemistry of fuel-air mixtures.
Diesel and gasoline fuel injection systems, fuel jet behavior, droplet distribution, droplet vaporization–ignition, gasoline direct injection engines (GDI).
Engine friction and lubrication. Introduction to tribology.
Pollutant formation and control in spark ignited and diesel engines.

Educational Goals

After successful completion of the course, the student should be able to:
-explain how and why an IC engine works. Recognize the basic types of engines and basic differences in their characteristics
-understand the mechanics and dynamics of the powertrain
-recognize the importance of minimizing various types of friction losses in an ICE and increase its efficiency
-understand the basic requirements on engine exhaust emissions abatement
-explain how and why a turbomachine works
-recognize the basic types of turbomachinery
-know the basic differences between a turbine and a pump, understand the dynamics and velocity triangles for each type of machine

General Skills

Research, analysis and synthesis of data and information, Adaptation to new situations, Decision making, Autonomous work, Exercise criticism and self-criticism, Promoting free, creative and inductive thinking.

Teaching Methods

Lectures, Exercises, Online guidance, Projected Presentations, E-mail communication, Online Synchronous and Asynchronous Teaching Platform (moodle).

Students Evaluation

Assessment Language: Greek/English
The final grade of the course is formed by 70% by the grade of the theoretical part and by 30% by the grade of the laboratory part.
1. The grade of the theoretical part is formed by a written final examination.
The written final examination of the theoretical part may include:
Solving problems of application of the acquired knowledge, Short answer questions etc.
2. The examination of the Laboratory Exercises is carried out with the continuous evaluation of the laboratory skills and the theoretical knowledge that were acquired in the course by the method of continuous evaluation and submission of weekly assignments.

Recommended Bibliography

1. J. B. Heywood: Internal Combustion Engine Fundamentals. McGraw Hill International Editions, 1988.
2. K. Mollenhauer and H. Tschoeke: Handbook of Diesel Engines. Springer-Verlag. London, 2010.
3. Woodruff E.B, Lammers H.B., Lammers T.F.: Steam Plant Operation, 8th Ed. McGraw-Hill Professional, 2004.