This course introduce the students in theoretical as well as practical subjects in the area of Energy Engineering, mainly for the production of thrust in aeroplanes, movement of fluids and production of energy with the use of turbomachinery, including wind turbines.

1.  Introduction: Basic Principles. Definition of a turbomachine. Coordinate system. Relative velocities. Velocity diagrams for an axial flow compressor stage. The fundamental laws. Dimensional analysis and performance laws. Incompressible fluid analysis. Performance characteristics for low‐speed machines. Compressible flow analysis. Flow coefficient and stage loading. Performance characteristics for high‐speed machines. Specific speed and specific diameter.
2. Hydroturbines. History, Applications, Pelton turbine, Francis Turbine, Kaplan turbine, The effect of size of efficiency, Cavitation in hydroturbines
3. Wind turbines. Types of wind turbines, Efficiency calculations, Annual energy production, Wind Data Statistical Analysis, Actuator Disc Approach, Control methods, BEM method
4. Two‐Dimensional Cascades. Cascade geometry. Compressor blade profiles. Turbine blade profiles. Cascade flow characteristics. Streamtube thickness variation. Cascade performance parameters. Analysis of cascade forces (lift and drag).
5. Axial‐Flow Turbines: Mean‐Line Analysis and Design. Velocity diagrams of the axial turbine stage. Turbine stage design parameters. Design flow coefficient. Stage loading coefficient. Stage reaction. Thermodynamics of the axial turbine stage. Repeating stage turbines. Stage losses and efficiency. Preliminary axial turbine design.
6. Axial‐Flow Compressors and Ducted Fans. Mean‐line analysis of the compressor stage. Velocity diagrams of the compressor stage. Thermodynamics of the compressor stage. Stage loss relationships and efficiency. Compressor loss sources. Mean‐line calculation
   through a compressor rotor.
7. Centrifugal Pumps, Fans and Compressors. Definitions. Thermodynamic analysis of a centrifugal compressor. The impeller. The diffuser. Inlet velocity limitations at the compressor eye. Design of a pump inlet. Design of a centrifugal compressor inlet. The slip factor. The relative eddy concept. Slip factor correlations. Head increase of a centrifugal pump. Performance of centrifugal compressors. Determining the pressure ratio. Effect of backswept vanes.

There are no prerequisite courses. It is recommended that students who are
interested in attending the course have completed successfully the following courses:
ΕΝ0101 THERMODYNAMICS  I

ΕΝ0112 THERMODYNAMICS II

ΕΝ0201 FLUID MECHANICS I

ΕΝ0202 FLUID MECHANICS II 
ΕΝ0400 AERODYNAMICS

-Suggested bibliography:

• S.L. Dixon and Cesare Hall -Fluid Mechanics and Thermodynamics of Turbomachinery-Butterworth- Heinemann (2014)
• Erik Dick-Fundamentals of Turbomachines-Springer Netherlands (2015)
• David Gordon Wilson, Theodosios Korakianitis-The Design of High-Efficiency Turbomachinery and Gas Turbines-MIT Press (2014)
• Aungier, Ronald H – Axial-flow compressors _ a strategy for aerodynamic design and analysis-ASME Press (2003)
• Aungier, Ronald H – Turbine aerodynamics _ axial-flow and radial-inflow turbine design and analysis- ASME Press (2006)

 Related academic journals:

• Transactions of the American Society of Mechanical Engineers ASME
• Journal of Turbomachinery
• Journal of Engineering for Gas Turbines and Power
• ΑΙΑΑ
• AIAA Journal
• Journal of Propulsion and Power
• ΙMechE
• Journal of power and energy ‐ part a
•  Journal of aerospace engineering ‐ part g
•  International Journal of Turbo and Jet‐Engines /Freund Publishing House

Greek

Lectures and practice exercises