Gas turbine powerplants and industrial applications. Gas turbine and combined cycle
off-design analysis; Low emission combustion systems.
2-Heat Transfer and Combustion in Gas Turbine
Cooling systems (turbolators, impingement). Protection systems (Film
cooling and Barrier coatings) . Secondary air system and sealing
solutions, Gas Turbine Combustors, Convective and Conductive heat
transfer numerical simulations; Experimental techniques for Heat
H.Saravanamuttoo, G.Rogers, H.Cohen "Gas Turbine Theory"
Pearson Education Limited 2009
J.C Han; S. Dutta and S.V. Ekkad " GAs Turbine Heat Transfer and Cooling
Technology" Taylor&Francis; New York, 2000.
B. Lakshminarayana; "Fluid Dynamics and Heat Transfer of
Turbomachinery". Jhon Wiley and Sons; New York, 1996.
Arthur H. Lefebvre "Gas Turbine Combustion"; Taylor&Francis; New York,
Lesson notes, in english, available @ Moodle https://e-l.unifi.it/ in the specific course section
Learning Objectives - Part A
The objective of the course is to provide knowledge about Gas Turbines
in different use for the land-based applications; in particular specific sections deal with
thermal and combustion process problems
CAPACITY ACQUIRED AT THE END OF THE COURSE:
Able to assess the performance of a powerplants system
based on gas turbine under real operating conditions.
Know and compare different types of power systems.
Being able to define a thermal problem in a gas turbine.
Identify calculation methodologies for the determination of the
loading and thermal state of a component. Know how to select suitable systems
to contain the thermal load of a component. Know how to define
a combustion system in a gas turbine. Calculation methodologies for the combustor thermal design.
With reference to the knowledge (CC) identified for the course, reference is made to the following descriptors:
cc1: In-depth knowledge in the field of energy and electricity cc2:Tools for modeling energy/mechanical/propulsion systems and their role in supporting the analysis and design of systems and components. Understanding the organization of information in databases and computer design to support processes cc5: Applied fluid dynamics and machinery: machine components and systems for energy conversion, propulsion and design principles: from the 0D basic approach to CFD for advanced design (optimization). cc6:Principles and problems of heat transfer in machinery and plants in systems and components of energy conversion machinery and plants: modeling techniques and computational simulation. Optimized design, management and control methods for heat transfer networks. cc7: Measurement of operating parameters, performance and emissions of components and energy conversion systems: standard and advanced techniques and technologies. Measurement chains, instruments and techniques for the detection of the most important thermofluid-dynamic parameters, instrumental uncertainties and propagation
While in reference to the competences acquired (CA) identified for the Course reference is made to the following descriptors:
ca1: Ability of analysis and modeling of mechanical/electrical/propulsive components and systems: basic problems and models for industrial engineering, with special reference to mechanical and energy engineering. ca3: Ability of designing, analyze, plan and manage energy conversion systems and their environmental impact, as well as complex and/or innovative service and process systems. ca5:Identify, formulate and solve industrial engineering problems, with special focus to energy issues. ca8:Ability of analyzing plants, components and process technologies and methods of engineering and their economic implications ca10: Communication skills to transfer information, ideas and solutions to specialists and others, in Italian and English
Prerequisites - Part A
Concepts of energy systems and turbo machinery with particular reference to
gas-turbine cycles and multistage gas turbines. Concepts of
convective and radiation heat exchange. Fundamentals of
heat conduction. Basics of combustion. Concepts of numerical calculation
and experimental techniques
Teaching Methods - Part A
Lessons, classroom exercises and workshops with activities in small groups. Guided tours to industries and laboratories.
Type of Assessment - Part A
Thermofluidodynamic analysis laboratory (numerical, experimental design) of high temperature gas turbine components -
Gas turbine Cycle modelling laboratory -
In the Thermofluidodynamic Analysis Laboratory students in small groups (3-4) deal with specific cases of study of high temperature components (turbine blades, discs, combustors) choosing between numerical approach (CFD), experimental investigation and design approach (simplified models 1-0D).
In the Gas Turbine Cycle Modeling Laboratory, students in small groups (3-4) deal with specific cases of study of gas turbine plants with OD numerical models of the different components. Laboratories activities are held in the last month of the course during which no frontal lessons are held. In the oral test we discuss Laboratories works and a theoretical question related to the lessons topics is discussed.
In the laboratory of thermofluidodynamic analysis, the cc 2,5,6,7 are highlighted in a context addressed to problem solving, from the discussion of the results it is also necessary to highlight the ca 2,4,5,6 in a multidisciplinary context (ca9) with adequate presentation capabilities (ca10). In the Laboratory of gas turbine cycle modeling the 1.2 cc are highlighted in a context addressed to problem solving, the discussion of the results must also highlight the ca 1 with adequate presentation capacity (ca10). In the course of the oral discussion, the most theoretical ccs are particularly verified and adequate skills are required to deal with the topics discussed in lessons.
N.B. For the definition of cc and ca please see the section Learning Objectives
13 January 2020
3 February 2020
24 February 2020
15 June 2020
13 July 2020
27 July 2020
14 September 2020
Location S.Marta Room 1 9.00 AM
Access to examinations list using http://sol.unifi.it
Course program - Part A
Gas turbine powerplants and propulsion (Actual development trend and
Gas turbine and combined cycle off-design analysis
Low emission combustion systems
Energy systems simulations approach and training lab
2-Heat Transfer and Combustion in Gas Turbines.
Heat Transfer analysis criteria. Gas Turbine cooling systems. Cooling:
solutions: Internal channels, turbolators, impingenent. Protection
systems: Film cooling and Barrier coatings. Typical nozzle/blade cooling
solutions. Secondary air system and sealing solutions. Gas Turbine
Combustors: classification and design criteria. Premixed and/or diffusive
flames adoption and relative definition of temperature and emissivity;
reactor modelling. DLN Combustor characteristics. – Classification and
design criteria of cooled liner; cooling solutions.
Heat Transfer numerical simulations: general criteria and guidelines:
RANS approach and turbulence modelling - LES/DNS approach –
Combustion process numerical simulations: general criteria and
guidelines: Liquid and gaseous fuels modelling; Radiation modelling. Heat
conduction numerical simulation, FEM approach and relative applications.
Experimental techniques for Heat Transfer analysis. Guidelines and
examples for specific application to gas turbine/combustor cooling