This course introduces the working principles of turbomachines. It’s aimed at developing an understanding, from fluid mechanics and thermodynamics point of view, how these devices work, performs and can be regulated. By the end of the course, students should have knowledge and understanding of:
- Understand the application of fundamentals of Thermodynamics and Fluid Mechanics to obtain the operating conditions of turbomachines.
- Able to analyze vapor and gas power systems, hydraulic systems, characteristic curves of turbomachines.
- Apply specific speed, specific diameter and Cordier diagram for turbomachine selection.
Luís Miguel Chagas da Costa Gil, Moisés Gonçalves de Brito
Weekly - 4
Total - 70
Fundamentals of Thermodynamics and Fluid Mechanics
Moran, M. J. and Shapiro, H. N. (2010). Fundamentals of Engineering Thermodynamics.
Andrews, J. and Jelley, N. (2007). Energy Science, principles, technologies, and impacts.
White, F. M. (2011). Fluid Mechanics.
Dixon, S. L. and Hall, C. A. (2014). Fluid Mechanics and Thermodynamics of Turbomachinery.
Dick, E. (2015). Fundamentals of Turbomachines.
Lectures and problem-solving sessions.
Assessment consists of 3 parts: two tests; laboratorial work and a project.
Two tests are performed during the semester or a final exam. The tests and exams are closed-book.
1.2. Laboratorial work
The final grade is calculated as:
Final grade = 0,7 x (Average of tests) + 0,15 x (Laboratorial work) + 0,15 x (Project)
A final grade equal or above 9.5 is necessary for approval.
1.1 Definition, classification field of turbomachines
2 Essential thermodynamics and fluid mechanics
2.1 Thermodynamic properties of fluids
2.2 Governing equations of fluid flow
2.2.1 Conservation of mass
2.2.2 Conservation of momentum
2.2.3 Conservation of energy
2.3 Application of energy conservation: Euler and Bernoulli equations
2.4 Incompressible flow in ducts
2.5 Flow around and airfoil: drag and lift forces
2.6 Compressible flow
2.7 Definitions of Efficiency: isentropic, mechanical, volumetric and overall efficiency
3 Incompressible power absorbing and power producing turbomachines
3.1 Introduction: definition e classification of axial, centrifugal and mixed-flow incompressible power absorbing and power producing turbomachines
3.2 Flow analysis: work principle, velocity triangles, application of governing equations, efficiency
3.3 Performance characteristics and operating range: application field of incompressible turbomachines
4 Compressible power absorbing and power producing turbomachines
4.1 Introduction: definition e classification of axial, centrifugal and mixed-flow compressible power absorbing and power producing turbomachines
4.2 Flow analysis: work principle, velocity triangles, application of governing equations, efficiency
4.3 Performance characteristics and operating range: application field of compressible turbomachines
5 Dimensional analysis of turbomachines
5.1 Estimate the dimensions and type of a turbomachine: specific speed, specific diameter and Cordier diagram
6 Wind turbines
6.1 Overall concepts and main components
6.2 Horizontal axis turbines
6.3 Aerodynamic efficiency: Betz limit
Programs where the course is taught: