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Syllabus ( ME 540 )


   Basic information
Course title: Combustion
Course code: ME 540
Lecturer: Dr. Öğr. Üyesi Salih Özen ÜNVERDİ
ECTS credits: 7.5
GTU credits: 3 (3+0+0)
Year, Semester: 1/2, Fall and Spring
Level of course: Second Cycle (Master's)
Type of course: Area Elective
Language of instruction: Turkish
Mode of delivery: Face to face
Pre- and co-requisites: none
Professional practice: No
Purpose of the course: Topics of this course are Definition of combustion, combustion modes and flame types, Combustion and thermochemistry , Thermodynamic properties, First law of thermodynamics, stoichiometry of reactant and product mixtures, absolute enthalpy and enthalpy of formation, enthalpy of combustion and heating values, adiabatic flame temperatures, chemical equilibrium, equilibrium products of combustion, recuperation, regeneration and exhaust gas recirculation, Mass transfer rate laws, species conservation, the Stefan problem, liquid-vapor interface boundary conditions, droplet evaporation.
   Learning outcomes Up

Upon successful completion of this course, students will be able to:

  1. Determine necessary coordinate system and physical variables and properties to generate mathematical models of engineering combustion problems.

    Contribution to Program Outcomes

    1. Define and manipulate advanced concepts of Mechanical Engineering
    2. Formulate and solve advanced engineering problems,
    3. Apply modern techniques, skills and equipments to advanced engineering practice
    4. Acquire scientific knowledge
    5. Develop an awareness of continuous learning in relation with modern technology
    6. Apply knowledge in a specialized area of mechanical engineering discipline and use variety of CAD/CAM/CAE tools.

    Method of assessment

    1. Written exam
  2. Model engineering combustion problems with differential and integral control volume approaches.

    Contribution to Program Outcomes

    1. Define and manipulate advanced concepts of Mechanical Engineering
    2. Formulate and solve advanced engineering problems,
    3. Apply modern techniques, skills and equipments to advanced engineering practice
    4. Acquire scientific knowledge
    5. Develop an awareness of continuous learning in relation with modern technology
    6. Apply knowledge in a specialized area of mechanical engineering discipline and use variety of CAD/CAM/CAE tools.

    Method of assessment

    1. Written exam
    2. Homework assignment
  3. Solve engineering combustion problems with analytical and numerical methods.

    Contribution to Program Outcomes

    1. Define and manipulate advanced concepts of Mechanical Engineering
    2. Formulate and solve advanced engineering problems,
    3. Apply modern techniques, skills and equipments to advanced engineering practice
    4. Acquire scientific knowledge
    5. Develop an awareness of continuous learning in relation with modern technology
    6. Apply knowledge in a specialized area of mechanical engineering discipline and use variety of CAD/CAM/CAE tools.

    Method of assessment

    1. Homework assignment
   Contents Up
Week 1: Definition of combustion, combustion modes and flame types.
Week 2: Combustion and thermochemistry - Thermodynamic properties, First law of thermodynamics, stoichiometry of reactant and product mixtures, absolute enthalpy and enthalpy of formation, enthalpy of combustion and heating values, adiabatic flame temperatures, chemical equilibrium, equilibrium products of combustion, recuperation, regeneration and exhaust gas recirculation.
Week 3: Mass transfer - Mass transfer rate laws, species conservation, the Stefan problem, liquid-vapor interface boundary conditions, droplet evaporation.
Week 4: Chemical kinetics - Elementary reaction rates, rates of reaction for multi-step mechanisms, relation between rate coefficients and equilibrium constants, steady-state approximation, the mechanism for unimolecular reactions, chain and chain-branching reactions.
Week 5: Some important chemical mechanisms - Hydrogen-oxygen system, carbon-monoxide oxidation, oxidation of higher paraffins, methane combustion, oxides of nitrogen formation.
Week 6: Coupling chemical and thermal analyses of reacting systems - Constant pressure fixed-mass reactor, constant volume fixed-mass reactor, well-stirred reactor, plug-flow reactor, applications to combustion system modelling.
Week 7: Simplified conservation equations for reacting flows - Overall mass conservation, species mass conservation, momentum conservation, energy conservation, the concept of a conserved scalar.
Week 8: Mid-term exam.
Week 9: Laminar premixed flames - Physical description, simplified analysis, factors influencing flame velocity and thickness, flame speed correlations for selected fuels, quenching by a cold wall, flammability limits and ignition, flame stabilization.
Week 10: Laminar diffusion flames (burning jets) - Non-reacting constant density laminar jet conservation laws, boundary conditions and solution, Jet flame physical description, Simplified theoretical analysis: Burning jet conservation equations, additional relations, conserved scalar approach, various solutions.
Week 11: Laminar diffusion flames (burning jets) - Flame lengths for circular-port and slot burners, Roper's correlations, flowrate and geometry effects, factors affecting stoichiometry, soot formation and destruction.
Week 12: Droplet evaporation and burning - Applications in diesel engines, gas-turbine engines, liquid-rocket engines, simple model of droplet evaporation and droplet lifetime, simple model of droplet burning, burning rate constant and droplet lifetime, extension to convective environments.
Week 13: Droplet evaporation and burning - Advanced approaches, one-dimensional vaporization-controlled combustion modelling and analysis.
Week 14: Axisymmetric turbulent jets, turbulent premixed flames and applications in spark-ignition engines, gas-turbine engines and industrial gas burners, turbulent flame speed, strucure of turbulent premixed flames (wrinkled laminar-flame, distributed reaction and flamelets-in-eddies regime), flame stabilization (by-pass ports, burner tiles, bluff bodies, swirl or jet-induced recirculation).
Week 15*: Turbulent nonpremixed flames - Simplified analysis of jet flames, flame length, flame radiation, liftoff and blowout.
Week 16*: Final exam.
Textbooks and materials: An Introduction to Combustion, Turns S., McGrawHill
Recommended readings: Principles of Combustion, Kuo K., Wiley
Combustion, Glassmann I., Yetter R., Academic Press
Combustion Theory, Williams F., Benjamin-Cummings
Combustion Physics, Law C., Cambridge
Turbulent Combustion, Peters N., Cambridge
Theoretical and Numerical Combustion, Poinsot T., Veynante D., Edwards
  * Between 15th and 16th weeks is there a free week for students to prepare for final exam.
Assessment Up
Method of assessment Week number Weight (%)
Mid-terms: 8 30
Other in-term studies: 0
Project: 0
Homework: 2,4,6,8,10,12,14 10
Quiz: 0
Final exam: 16 60
  Total weight:
(%)
   Workload Up
Activity Duration (Hours per week) Total number of weeks Total hours in term
Courses (Face-to-face teaching): 3 14
Own studies outside class: 4 14
Practice, Recitation: 6 7
Homework: 3 7
Term project: 0 0
Term project presentation: 0 0
Quiz: 0 0
Own study for mid-term exam: 10 1
Mid-term: 3 1
Personal studies for final exam: 10 1
Final exam: 3 1
    Total workload:
    Total ECTS credits:
*
  * ECTS credit is calculated by dividing total workload by 25.
(1 ECTS = 25 work hours)
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