|Abbreviation: TURBST||Load: 30(L)
|Lecturers in charge: ||izv. prof. dr. sc. Željko Tuković
|Lecturers: ||izv. prof. dr. sc. Željko Tuković
|Course description: Course objectives:
Introduction of students with basic principles of energy conversion in turbomachines, their flow and working characteristics as basis for efficient buildingup in systems in which the turbomachine is used, in this case in internal combustion engine.
Enrolment requirements and required entry competences for the course:
Regular attendance of lectures and exercizes.
Grading and evaluation of student work over the course of instruction and at a final exam:
Methods of monitoring quality that ensure acquisition of exit competences:
Upon successful completion of the course, students will be able to (learning outcomes):
differentiate types of turbomachineries according to direction of energy transfer, type of fluid and direction of flow through the rotor
apply dimensionless parameters to transform performance characteristics of turbomachineries
apply Euler equation to different types of turbomachineries
calculate efficiency of hydraulic and and thermal turbomachineries
analyze energy conversion process in the stages of different types of turbomachineries
perform preliminary design procedure for different types of turbomachineries
select pump and fan for specified system
1. Introduction remarks and classifications of turbomachines with regard to different criterions.
2. Equations of thermodynamics and fluid mechanics. Equation of turbomachine for incompressible and compressible fluid.
3. Types of turbomachines cascades. Cascades geomatric characteristics. Forces on profile in cascade. Losses and efficiency of cascade.
4. Stage of turbomachine: axial and radial, for incompressible and compressible fluid.
5. Centrifugal pump. Basic principles. Specific speed. Pump power, losses and efficiency.
6. Centrifugal blower and turbocompressor. Geometric characteristics of stage. Blades shape. Velocity triangles. Theoretical power delivered to impeller. Reaction. Vane and vaneless diffuser. Actual power delivered to impeller, losses and isentropic efficiency of stage. The stage flow coefficient and loading factor.
7. Radial and centripetal turbine. Thermodynamics and aerodynamics of stage. Power, losses and relative blade efficiency. Reaction ratio. Specific speed.
8. Axial fan. Pressure, power and fan efficiency. Fan dimensionless characteristics.Velocity triangles, lift and drag coefficient, losses.
9. Axial turbine and compressor. Working principle, constitution and classification. Geometrical characteristics of stage. Working fluid forces on rotor blades. Reaction ratio. Losses and efficiency. Stages with long blades. Determination of blade height. Cooling of gas turbines. Governing and emergency governing. The flow coefficient and loading factor of compressor stage.
10. Multistage turbomachine. Limitation on working characteristics of single stage turbomachine. The need for multistage turbomachine. Polytropic efficiency. Correlation between polytropic and isentropic efficiency. Reheat factor.
11. Working characteristics of turbomachines: determination of working characteristics, working point of turbomachine and installation, change of working point. Boundary working conditions of turbomachine (surge, rotating stall, etc.)
12. Gasturbine cycles: basic, with intercooling, with reheat and with heat exchanger. Combustion chamber: types, organization of combustion process and principles of thermodynamic calculation.
13. Gas turbine for jet propulsion: jet, fanjet and turboprop engine.
14. Turbomachines testing: testing standards, measuring equipments (installations), measuring methods, Aqisition and process of measuring data.
15. Basic turbomachines designs. Basic elements. Manufacture technology. Materials.
1. Introduction with turbomachines types which will be studied by means of figures diapositives.
2. Numerical examples which are related to equation of turbomachines.
3. Examples of twodimensional turbomachine cascade defining using known aeroprofiles, calculation of forces, losses and efficiency.
4. Examples of basic geometrical and flow characteristics calculation of axial and radial stage, both for compressible and incompressible working fluid.
5. Calculation of basic hydraulic and geometrical characteristics of centrifugal pump: velocities triangles, forces on blades, losses, power, efficiency, blades height, etc.
6. Calculation of basic thermo and aerodynamical characteristics of centrifugal blower and turbocompressor: velocities triangles, reaction, forces on blades, losses, power, efficiency, blades height, etc.
7. Calculation of basic thermo and aerodynamical characteristics of radial turbine stage: velocities triangles, reaction, forces on blades, losses, power, efficiency, blades height, etc.
8. Calculation of basic thermo and aerodynamical characteristics of axial fan: velocities triangles, reaction ratio, forces on blades, losses, power, efficiency, blades height, etc.
9. Calculation of basic thermo and aerodynamical characteristics of axial turbine and compressor: velocities triangles, reaction ratio, forces on blades, losses, power, efficiency, blades height, etc.
10. Calculation of isentropic efficiency on the basis of polytropic. Calculation of reheat factor of multistage steam turbine.
11. Review of working characteristic determination of one from studied turbomachines. Determination of working point of turbomachine and installation (of system).
12. Thermodinamical calculation of gas turbine cycle. Thermodynamical calculation of combustion chamber.
13. Thermodynamical calculation of ideal and real cycles and basic characteristics of jet engines.
14. Review of test installation and prototype testing results (of measurements) of one from studied turbomachines.
15. Review of designs and basic elements of studied turbomachines by means of diapositives figures of different manufacturer.
|1. ||Peng, W. W.: Fundamentals of turbomachinery, Wiley, 2008.
|2. ||- Dixon, S.L., Hall, C. A.: Fluid Mechanics and Thermodynamics of Turbomachinery, Butterworth-Heinemann, 2010.
|Recommended literature: - - -