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Courses » Combustion in air breathing aero engines

Combustion in air breathing aero engines

ABOUT THE COURSE:

This course will provide detailed, state of the art understanding of chemical kinetics, flames, turbulence and turbulent combustion, followed by discussions on modern aero engine combustors and how they optimize the above processes. Therefore, after successful completion of the course, the student should be well versed with the understanding of the complex, physico-chemical processes in modern air-breathing aero engines. This should allow him/her to model, design and improve combustors towards more efficient engines. Senior B.E., B. Tech, M. Tech, Ph. D students in academia and professionals working at industrial research labs, government or private, with basic background in combustion and fluid mechanics could find this course useful.


INTENDED AUDIENCE

Senior B. Tech, M. Tech, Ph. D students in academia and professionals engineers/scientists working at industrial research labs, government or private, with basic background in combustion and fluid mechanics

PREREQUISITES

Fluid Mechanics, Heat Transfer

1229 students have enrolled already!!

ABOUT THE INSTRUCTOR:

Prof. Swetaprovo Chaudhuri is an Assistant Professor at the Department of Aerospace Engineering, Indian Institute of Science, since June 2013. Prior to this appointment he was a research staff in the Department of Mechanical and Aerospace Engineering and Combustion Energy Frontier Research Centre at Princeton University. He earned his Ph.D. from the University of Connecticut in 2010 and B.E. from Jadavpur University in 2006, both in Mechanical Engineering. His research interests and significant contributions span over fundamental and applied aspects of turbulent combustion and functional droplets. These contributions have been disseminated through over 60 publications in top journals and international conferences.

COURSE OUTLINE :

Introduction and Chemical Thermodynamics
Combustion and its key role in Air-breathing Aero Engines.
Introduction to Classical Thermodynamics; Chemical Equilibrium; Equilibrium Constants; Heats of Formation, Reaction, Combustion; Adiabatic Flame Temperature.

Chemical Kinetics Theory
Motivation; Generalized Description of Chemical Reactions; Law of Mass Action; QSS and PEA Approximations; Arrhenius Law; Reaction Rate Constant; Collision Theory; Transition State Theory; Lindemann Theory; Generalized Description of Chain Reaction Mechanism.

Fuel Oxidation Mechanisms
Practical Fuels; Importance of Detailed Reaction Mechanisms; Oxidation Mechanism of Hydrogen and Z-curve;Oxidation of Carbon Monoxide; Methane Oxidation and Auto-ignition; Low-Temperature Combustion; NOx Formation Mechanisms; Soot Formation Mechanisms; Mechanism Reduction

Transport Phenomena
Transport in Multicomponent Systems; Importance of Diffusion Processes and Derivation of Diffusion Coefficients.

Governing Equations
Reynolds Transport Theorem and Brief Derivation of Mass, Momentum, Species and Energy Equations; Constitutive Relations; Isobaric Assumption; ASimplified Diffusion Controlled System; Coupling Function Formulation.

Non Premixed Flames
1D Chambered Flame Analysis, Stefan Convection, Droplet Evaporation and Combustion.

Premixed Flames
Rankine Hugoniot Relations – Deflagration and Detonation; 1D Laminar Premixed Flame: Phenomenological Derivation of Flame Speed, Frank Kamenetskii Analysis of Flame Speed, Methods of Flame Speed Measurement, Chemical Structure of Flames.

Premixed Flames and Limit Phenomena
Quenching Distance and Ignition; Adiabatic Thermal Explosion, Semenov Criteria, S-curve Concept, Premixed Flame Extinction by Heat Loss.

Turbulence and Introduction to Turbulent Combustion
Fundamentals of Turbulence: ReynoldsAveraged Navier-Stokes Equations: Turbulence Kinetic Energy Production and Dissipation; Energy Cascade; Favre Averaging; Mean Reaction Rate Closure Problem; EBU, EDC Closures, and their Limitations.

Turbulent Non-Premixed Combustion
Governing Equations in Mixture Fraction Space; Flamelet Model; Introduction to TPDF and CMC Models.

Turbulent Premixed Combustion
Turbulent Premixed Combustion Regime Diagrams; G Equation; Turbulent Flame Speed; Fundamentals of Turbulence-Flame Interaction.

Gas Turbine Combustors
Liquid Jet Breakup; Basics of Swirling Flows and Flames; Gas Turbine Combustors Design Considerations; Introduction to Thermoacoustic Instabilities.

Flame Stabilization in Afterburners
Mechanism of Flame Stabilization and Blowoff in Prototypical Afterburner using Laser-Based Diagnostics.

Scramjet Combustors
Introduction to Scramjets; Scramjet Combustor Design Considerations, Challenges in Achieving Steady Combustion in Scramjets.

SUGGESTED READING

  1. C. K. Law, Combustion Physics, Cambridge University Press.
  2. I. Glassman, R. A. Yetter, Combustion 4th edition, Elsevier.
  3. F. A. Williams, Combustion Theory, 2nd edition, Addison-Wesley.
  4. N. Peters, Turbulent combustion, Cambridge University Press.
  5. A. Lipatnikov, Fundamentals of Premixed Turbulent Combustion, CRC Press.
  6. A. H. Lefebvre, D. R. Ballal, Gas Turbine Combustion, 3rd edition, CRC Press.
  7. T. Lieuwen, Unsteady Combustor Physics, Cambridge University Press.
  8. C. Segal, The Scramjet Engine, Cambridge University Press.
  9. T. Poinsot, Theoretical & Numerical Combustion, 2nd edition, Edwards.
CERTIFICATION EXAM:
  • The exam is optional for a fee. Exams will be on 22 October 2017
  • Time: Shift 1: 9am-12 noon; Shift 2: 2pm-5pm
  • Any one shift can be chosen to write the exam for a course.
  • Registration url: Announcements will be made when the registration form is open for registrations.
  • The online registration form has to be filled and the certification exam fee needs to be paid. More details will be made available when the exam registration form is published.

CERTIFICATE:

  • Final score will be calculated as : 25% assignment score + 75% final exam score
  • 25% assignment score is calculated as 25% of average of best 8 out of 12 assignments
  • E-Certificate will be given to those who register and write the exam and score greater than or equal to 40% final score.Certificate will have your name, photograph and the score in the final exam with the breakup. It will have the  logos of NPTEL and IISc Bangalore. It will be e-verifiable at nptel.ac.in/noc