JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Pre-Requisites

Nil

Course Objectives:

• Understand the concepts in combustion theory and illustrate students involved in combustion research with the required fundamental knowledge in combustion stoichiometry.
• Familiarize in the area of combustion in various engines, generalise stability limits and flame stabilization in diffusion flame.
• Calculate the combustion efficiency. Discuss fundamental combustion problems arising from gas turbine combustion or more generally from combustion in steady flowing premixed systems.
• Determine the supersonic combustion. Combustion in rocket engines and emission. Different types of combustion chambers in gas-turbine engines, primary requirements of the combustor, afterburners.

Course Outcomes:

• To familiarize the students in the area of combustion in various engines.

UNIT - I

Basics Of Combustion Theory: Combustion stoichiometry and thermo chemical calculation, chemical kinetics and equilibrium, transport phenomena, theory of viscosity, conductivity and diffusivity.

UNIT - II

Pre-Mixed Flames: Description of premixed flames, burning velocity and parametric dependences, experimental methods of measuring burning velocity, simple one-dimensional thermal theory of flame, concepts of minimum ignition energy, quenching distance, stability limits and flame stabilization.

UNIT - III

Diffusion Flame: Jet flame physical description, theoretical analysis-Burke-Schumann‘s analysis, mechanism of soot formation, Defining of premixed, diffusion flames, liquid fuel combustion flames. Liquid fuel combustion, difference between premixed and diffusion flames, liquid fuel combustion- conservation equations, calculation of mass burning rate, droplet burning.

UNIT - IV

Combustion In Reciprocating And Gas- Turbine Engines: Description of the combustion process in piston engines, Combustion efficiency and factors affecting it, Rankine - Hugoniot curves, deflagration and detonation in reciprocating engines and preventive methods; Description of different types of combustion chambers in gas-turbine engines, primary requirements of the combustor, afterburners.

UNIT - V

Combustion In Rocket Engines And Emission: Types of rockets based on combustion, solid fuel combustion, combustion of carbon particle, simplified analysis, boundary layer combustion, combustion of carbon sphere with co burning gas phase; Chemical emission from combustion and its effects, exhaust gas analysis, emission control.

TEXT BOOKS:

• 1. Stephen R Turns, ―An Introduction to combustion Concepts and Applicationǁ, TMH Publication, 3rd Edition, 2011.
• 2. Fawzy El-Mahallawy, Saad El-Din Habik, Elsevier ―Fundamentals and Technology of combustionǁ, 1st Edition, 2002.

REFERENCE BOOKS:

• 1. Charles E. Baukal, ―Heat Transfer in Industrial Combustionǁ, CRC Press, 1st Edition, 2000.
• 2. G. Singer, ―Combustion, Fossil Power Systemsǁ Ed Publications, 4th Edition, 1966.
• 3. S. P. Sharma, Chandra Mohan ―Fuels and Combustionǁ, Tata McGraw Hill Publishing Co., 1st Edition, 1987.